Java Developer Job Description Template

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Java Developer Job Description Template

A Java developer is instrumental in designing, creating, and maintaining high-quality Java-based applications. Proficient in software development and adept in programming languages such as Java, JavaScript, and Python, Java developers work on application development that meets user needs and business requirements. The role involves utilizing frameworks like Spring, Hibernate, and Java EE, as well as adhering to software development lifecycle practices to deliver efficient software solutions. Java developers are responsible for implementing user interfaces, troubleshooting technical issues, and debugging code to ensure functionality and security across various web applications.

This Java developer job description is crafted to attract candidates with hands-on experience and problem-solving skills who are comfortable working in agile and scrum environments. For added flexibility, consider finding full stack Java developers on Upwork who can work on both front-end and back-end components and who are familiar with tools such as Git, Maven, Docker, and AWS.

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Job Overview

Our team is seeking a Java developer skilled in object-oriented programming to join our software engineering department. This role requires proficiency in SQL, Oracle, and relational databases as well as knowledge of HTML, CSS, and APIs for web development and web services. The ideal candidate will have a bachelor’s degree in computer science or a related field and certifications in Java programming language. Candidates should have a demonstrated ability to collaborate with team members, stakeholders, and project managers and should be comfortable conducting code reviews and integrating design patterns like MVC into the development process.

As a Java developer, you will play a critical role in enhancing the functionality of java-based applications by working on interfaces, managing unit testing, and using build tools to streamline the project management workflow.

Key Responsibilities

As a Java developer, your primary responsibilities will include:

Developing Java applications. Design, develop, and implement Java-based applications that meet business requirements and provide optimal user experiences.
Collaborating with team members. Work closely with stakeholders, project managers, and front-end and back-end developers to create effective software solutions.
Debugging and troubleshooting. Identify and resolve technical issues that impact functionality and performance, ensuring seamless application development.
Implementing unit testing. Conduct comprehensive unit testing to validate the functionality of each application module, adhering to software development lifecycle best practices.
Writing optimized Java code. Ensure Java code quality by following best practices and utilizing object-oriented programming principles to build scalable applications.
Utilizing frameworks. Leverage Java frameworks such as Spring, Hibernate, and Java EE to expedite development while maintaining high standards.
Building and managing APIs. Develop and manage APIs to facilitate smooth communication between applications and web services.
Conducting code reviews. Participate in code reviews to ensure code quality, maintain consistency, and share insights on design patterns.
Using development tools. Utilize tools like Git, Maven, Docker, and AWS to manage project dependencies and streamline deployment.
Ensuring application security. Implement security best practices in Java-based applications to protect data and meet compliance standards.

Qualifications and Skills

To be considered for the role of Java developer, candidates should have:

Education. A bachelor’s degree in computer science, software engineering, or a related field. Advanced degrees or certifications are advantageous.
Experience. Three to five years of experience in Java development and working on Java-based applications.
Java proficiency. Strong knowledge of Java programming language and hands-on experience with Java frameworks like Spring and Hibernate.
Back-end development. Practical experience in back-end development for web applications.
Database management. Proficiency in SQL and familiarity with relational databases such as Oracle.
Front-end knowledge. Basic understanding of HTML, CSS, and JavaScript to facilitate integration with back-end systems.
Familiarity with development tools. Skilled in using Git, Maven, Docker, and AWS for efficient code management and deployment.
Problem-solving skills. Strong problem-solving skills for debugging and troubleshooting technical issues.
Communication and teamwork. Excellent communication skills and the ability to work in agile and scrum teams.

About Our Company

[Company Name] is an industry leader in [Industry] that specializes in developing innovative software solutions for clients. Our dynamic work environment encourages collaboration, growth, and creativity. We prioritize high standards and quality in every project, and we are committed to building software that makes a difference. If you have a passion for software development and enjoy tackling challenges, we invite you to join our team and help us deliver impactful solutions to our clients.

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What does a Java developer do?

A Java developer is responsible for creating, testing, and maintaining Java-based applications that support business needs and user requirements. They use the Java programming language and integrate frameworks like Spring and Hibernate to develop software solutions that are efficient, secure, and scalable. This role involves close collaboration with stakeholders, project managers, and other team members to ensure applications meet functional requirements and align with the organization’s goals.

Java developers work within agile and scrum environments, participating in all stages of the software development lifecycle. They conduct debugging, unit testing, and code reviews to maintain quality standards and deliver high-quality applications. Additionally, Java developers ensure compliance with industry standards and implement security measures to safeguard application data.

Java developer duties and responsibilities

A Java developer is responsible for designing, developing, and maintaining software solutions to meet organizational needs. Key duties include:

Developing Java applications. Build and deploy Java-based applications that align with business objectives.
Collaborating with team members. Partner with stakeholders, front-end developers, and back-end teams to ensure seamless development.
Debugging and troubleshooting. Identify, assess, and resolve technical issues to maintain smooth functionality.
Conducting unit testing. Perform unit testing to validate and ensure the functionality of application modules.
Writing optimized Java code. Produce Java code that adheres to best practices in object-oriented programming.
Utilizing frameworks and libraries. Implement Spring, Hibernate, and Java EE frameworks to support development.
Managing databases. Handle SQL and relational databases to maintain data integrity.
Reviewing code. Engage in code reviews to ensure quality and consistency in application development.
Utilizing development tools. Use Git, Maven, Docker, and AWS for effective project management.
Ensuring application security. Incorporate security protocols within applications to protect user data.

How to write a Java developer job description

Creating a detailed Java developer job description will help attract top candidates. Here’s a guide:

Choose a clear job title. "Java Developer" should be prominently used to make the role recognizable.
Provide an engaging overview. Describe the key functions of the role, including Java-based application development.
List key responsibilities. Include primary tasks like coding, debugging, and implementing unit testing.
Specify required qualifications. Mention essential qualifications like a bachelor’s degree, proficiency in Java, and experience with frameworks.
Describe your company. Highlight your company’s values and mission to attract aligned candidates.

FAQ about Java developers

1. What is the typical Java developer salary?

The salary for a Java developer role depends on experience, location, and industry, generally ranging from $99,000 to $143,000 annually in the U.S., according to Glassdoor. Senior Java developers with significant experience, specialized skills, or further education such as a master’s degree can command higher salaries.

2. What qualifications are needed for a Java developer?

A Java developer typically holds a bachelor’s degree in computer science, software engineering, or a related field. Proficiency in Java programming language and familiarity with frameworks like Spring and Hibernate are essential.

3. What skills are important for a Java developer?

Key skills for a Java developer include Java programming language proficiency, strong problem-solving skills, familiarity with frameworks (e.g., Spring), and experience with back-end development and SQL databases. Experience with Git and Docker is also beneficial.

4. What does a Java developer’s day to day look like?

A Java developer typically spends their day coding, debugging, conducting unit testing, and collaborating with team members on software development projects. They also participate in scrum meetings, perform code reviews, and consult with stakeholders.

5. What is the difference between a Java developer and a software engineer?

While both roles focus on software development, a Java developer specializes in Java-based applications and Java frameworks, while a software engineer may work with multiple programming languages and focus on various aspects of software solutions.

Hire Java developers on Upwork

Looking to hire an experienced Java developer to support your application development needs? Post a job on Upwork to connect with skilled Java developers who specialize in Java-based apps, software engineering, and troubleshooting. Find the right candidate for your team by starting your search on Upwork today.

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Java Developers you can meet on Upwork

$95 hourly
Vano E.
- 5.0
- (9 jobs)
Vanadzor, LORI
Java
C++
Node.js
JavaScript
Laravel
PHP
TypeScript
GraphQL
SQL
IT Consultation
Machine Learning
Deep Learning
Linux System Administration
Deep Neural Network
Python

⭐⭐⭐⭐⭐ I’m an AI & Automation Systems Architect with a strong background in full-stack engineering, Python development, machine learning, and DevOps. I focus on building intelligent systems that optimize how businesses operate by connecting tools, data, and workflows through automation and AI. I don’t just build applications. I design and implement systems where processes are automated, information is structured, and AI supports real operational decisions. What I Do ✔️ Analyze and optimize business workflows and information flow ✔️ Design AI-driven automation systems for operations ✔️ Build end-to-end automations using APIs, webhooks, and automation platforms ✔️ Integrate LLMs and machine learning models into real business workflows ✔️ Architect scalable backends, APIs, and data pipelines ✔️ Connect databases, CRMs, and tools into unified intelligent systems ✔️ Set up DevOps, CI/CD, containerization, and cloud infrastructure ✔️ Maintain, optimize, and scale existing systems Technical Expertise ✔️ Python, JavaScript, SQL ✔️ Django, Flask, React, Node.js ✔️ Machine Learning, LLM integration, embeddings, RAG architectures ✔️ PostgreSQL, MySQL, MongoDB, Redis ✔️ Automation platforms, API orchestration, webhooks ✔️ Docker, Kubernetes, CI/CD, AWS, GCP, Azure Approach I start by understanding how your current processes work. Then I design the system architecture. Then I implement automation and AI at the points where it creates measurable impact. The result is a reliable, AI-assisted operational system that improves efficiency and reduces manual work. Want to work together? I’d love to hear from you!
$60 hourly
Pero M.
- 5.0
- (11 jobs)
Bitola, BITOLA
Java
Airtable
Apache Kafka
XML
API Integration
JSON
Apache Maven
Spring Integration
Salesforce
SnapLogic
Spring Boot
API
CSS
SQL
JavaScript

Specialized Java and certified SnapLogic developer, practicing java for more than 4 years and Data Integration (SnapLogic) almost 3 years. You can see/verify my certification in certification section bellow. Also for my self I could say that I'm Salesforce enthusiast, every spare free time I used for learning Salesforce platform. Highly motivated and hardworking, willing to learn new skills also eager to absorb as much knowledge and insight as possible ability to maintain high level of confidentiality. I have good work ethic, capable to work with a team, always on time(fulfill deadlines).
$80 hourly
Adrian M.
- 5.0
- (2 jobs)
Perth, WA
Java
AI Chatbot
ChatGPT API Integration
LLM Prompt Engineering
AI Development
Node.js
Django
Oracle PLSQL
Azure DevOps
Apache Tomcat
JavaScript
React
Python
C#
SQL

Looking for an experienced software engineer who has extensive industry experience, wide ranging technical skills, great communication skills, can work independently, and has an ability to really 'get' the big vision of what you want to achieve? Need someone who can fine-tune your new AI app or figure out why it's not working? UNDERSTANDING I don't just blindly focus on the technical aspects of the project. I will make sure that I understand exactly what your business wants and how the project will be used in the real world, so I can deliver something that is intuitive for users and exceeds your expectations. CREATIVITY I love coming up with brilliant and creative ideas for how your product could be improved or tweaked. If you're looking for a passive, mindless worker then you should hire someone else. I will frequently inject fresh new ideas into the discussion, and challenge your thinking. QUALITY What I can offer that you probably won't find from other freelancers here is a very high level of production build quality and testing. Instead of delivering the minimum to you, I excel in delivering a high-quality product that is not an unstable or incomplete prototype, but a production-ready product that is complete, user-friendly, intuitive, and free of bugs. EXPERIENCE I have 15+ years of experience as a software developer, building both front-end and back-end software applications, specialising in Java, JavaScript, React, Python, Django, C#, and SQL. I can integrate with LLMs such as ChatGPT to build AI features. I'm confident solving complex problems, designing new architectures, building DevOps pipelines, integrating 3rd party APIs, designing relational databases. I have exceptional skills in the area of problem-solving and trouble-shooting. COMMUNICATION What also sets me apart from most developers are my fantastic communication and people skills, making me a breeze to work with, and allowing you to understand the big picture even if you’re not a technical person. INDEPENDENCE I have and an ability to work independently to make technical decisions and solve problems, meaning you don't have to waste time micro-managing me. But it's up to you how much you delegate. I will find out from you which decisions you want to be a part of, and which ones you are happy to entrust to me. You always have the final say. WHAT TO EXPECT If I start a project with you, here is what to expect: 1. I will have a lengthy conversation with you to make sure I fully understand all of your expectations and requirements. Based on this, we will agree on individual delivery milestones. 3. I will write up the technical design for each milestone, along with an estimate of development time, and a plan for how to quality test it once it's complete. 4. I will work on each milestone and deliver a preview of it to you for feedback and minor tweaks. 5. I will then begin a round of quality testing to find bugs and ensure the product is stable and complete. 6. We will discuss and feedback and also bugs found during testing, and negotiate what can be realistically changed or fixed within the timeframe and budget of the project. 7. I will apply any fixes or minor tweaks that we agreed upon. 8. I will then deliver the final version of the software to you, complete with documentation for how to set up the development environment, how to deploy the software, and how to use it. Don’t wait, get in touch now and we can plan our first project together!

$95 hourly
Vano E.
- 5.0
- (9 jobs)
Vanadzor, LORI
Java
C++
Node.js
JavaScript
Laravel
PHP
TypeScript
GraphQL
SQL
IT Consultation
Machine Learning
Deep Learning
Linux System Administration
Deep Neural Network
Python

⭐⭐⭐⭐⭐ I’m an AI & Automation Systems Architect with a strong background in full-stack engineering, Python development, machine learning, and DevOps. I focus on building intelligent systems that optimize how businesses operate by connecting tools, data, and workflows through automation and AI. I don’t just build applications. I design and implement systems where processes are automated, information is structured, and AI supports real operational decisions. What I Do ✔️ Analyze and optimize business workflows and information flow ✔️ Design AI-driven automation systems for operations ✔️ Build end-to-end automations using APIs, webhooks, and automation platforms ✔️ Integrate LLMs and machine learning models into real business workflows ✔️ Architect scalable backends, APIs, and data pipelines ✔️ Connect databases, CRMs, and tools into unified intelligent systems ✔️ Set up DevOps, CI/CD, containerization, and cloud infrastructure ✔️ Maintain, optimize, and scale existing systems Technical Expertise ✔️ Python, JavaScript, SQL ✔️ Django, Flask, React, Node.js ✔️ Machine Learning, LLM integration, embeddings, RAG architectures ✔️ PostgreSQL, MySQL, MongoDB, Redis ✔️ Automation platforms, API orchestration, webhooks ✔️ Docker, Kubernetes, CI/CD, AWS, GCP, Azure Approach I start by understanding how your current processes work. Then I design the system architecture. Then I implement automation and AI at the points where it creates measurable impact. The result is a reliable, AI-assisted operational system that improves efficiency and reduces manual work. Want to work together? I’d love to hear from you!
$60 hourly
Pero M.
- 5.0
- (11 jobs)
Bitola, BITOLA
Java
Airtable
Apache Kafka
XML
API Integration
JSON
Apache Maven
Spring Integration
Salesforce
SnapLogic
Spring Boot
API
CSS
SQL
JavaScript

Specialized Java and certified SnapLogic developer, practicing java for more than 4 years and Data Integration (SnapLogic) almost 3 years. You can see/verify my certification in certification section bellow. Also for my self I could say that I'm Salesforce enthusiast, every spare free time I used for learning Salesforce platform. Highly motivated and hardworking, willing to learn new skills also eager to absorb as much knowledge and insight as possible ability to maintain high level of confidentiality. I have good work ethic, capable to work with a team, always on time(fulfill deadlines).
$80 hourly
Adrian M.
- 5.0
- (2 jobs)
Perth, WA
Java
AI Chatbot
ChatGPT API Integration
LLM Prompt Engineering
AI Development
Node.js
Django
Oracle PLSQL
Azure DevOps
Apache Tomcat
JavaScript
React
Python
C#
SQL

Looking for an experienced software engineer who has extensive industry experience, wide ranging technical skills, great communication skills, can work independently, and has an ability to really 'get' the big vision of what you want to achieve? Need someone who can fine-tune your new AI app or figure out why it's not working? UNDERSTANDING I don't just blindly focus on the technical aspects of the project. I will make sure that I understand exactly what your business wants and how the project will be used in the real world, so I can deliver something that is intuitive for users and exceeds your expectations. CREATIVITY I love coming up with brilliant and creative ideas for how your product could be improved or tweaked. If you're looking for a passive, mindless worker then you should hire someone else. I will frequently inject fresh new ideas into the discussion, and challenge your thinking. QUALITY What I can offer that you probably won't find from other freelancers here is a very high level of production build quality and testing. Instead of delivering the minimum to you, I excel in delivering a high-quality product that is not an unstable or incomplete prototype, but a production-ready product that is complete, user-friendly, intuitive, and free of bugs. EXPERIENCE I have 15+ years of experience as a software developer, building both front-end and back-end software applications, specialising in Java, JavaScript, React, Python, Django, C#, and SQL. I can integrate with LLMs such as ChatGPT to build AI features. I'm confident solving complex problems, designing new architectures, building DevOps pipelines, integrating 3rd party APIs, designing relational databases. I have exceptional skills in the area of problem-solving and trouble-shooting. COMMUNICATION What also sets me apart from most developers are my fantastic communication and people skills, making me a breeze to work with, and allowing you to understand the big picture even if you’re not a technical person. INDEPENDENCE I have and an ability to work independently to make technical decisions and solve problems, meaning you don't have to waste time micro-managing me. But it's up to you how much you delegate. I will find out from you which decisions you want to be a part of, and which ones you are happy to entrust to me. You always have the final say. WHAT TO EXPECT If I start a project with you, here is what to expect: 1. I will have a lengthy conversation with you to make sure I fully understand all of your expectations and requirements. Based on this, we will agree on individual delivery milestones. 3. I will write up the technical design for each milestone, along with an estimate of development time, and a plan for how to quality test it once it's complete. 4. I will work on each milestone and deliver a preview of it to you for feedback and minor tweaks. 5. I will then begin a round of quality testing to find bugs and ensure the product is stable and complete. 6. We will discuss and feedback and also bugs found during testing, and negotiate what can be realistically changed or fixed within the timeframe and budget of the project. 7. I will apply any fixes or minor tweaks that we agreed upon. 8. I will then deliver the final version of the software to you, complete with documentation for how to set up the development environment, how to deploy the software, and how to use it. Don’t wait, get in touch now and we can plan our first project together!
$50 hourly
David M.
- 5.0
- (3 jobs)
Belgrade, CENTRAL SERBIA
Java
Unity
Android
C++
C#

Unity Developer with hands-on experience building complex gameplay systems, solving challenging technical problems and independently developing full games. Fast learner and reliable team contributor, capable of working effectively both independently and as part of a team.
$100 hourly
Amar K.
- 5.0
- (32 jobs)
Bengaluru, KA
Java
Automation
Claude
Large Language Model
Amazon
Data Engineering
Docker
Google Cloud Platform
Apache Airflow
React
Chatbot
SQL
PySpark
Python

I help startups and enterprises build AI-powered products, modern data platforms, and scalable cloud solutions. I’ve delivered 30+ successful projects with a 100% Job Success score and $100K+ in earnings. 🎖️ 10+ Years Experience | 30+ Projects — All 5-star Rated 🏆 | Expert-Vetted | 100% Job Success I’ve spent over a decade building full-stack applications, data pipelines, and AI integrations for teams that need both solid engineering and clear communication. What I bring to your project I focus on delivery: clear scope, on-time execution, and code that’s maintainable and scalable. My work spans frontend (React, TypeScript, Angular), backend (Java/Spring Boot, Python/Django/Flask, Node.js), and cloud (AWS, GCP, Azure). I’ve designed and built microservices, real-time analytics, and ETL pipelines that handle high volume with Spark, Kafka, and Airflow, and I integrate LLMs and RAG (LangChain, LlamaIndex, vector DBs) when the product needs AI. Why clients keep coming back I’ve delivered 30+ projects with a 100% job success rate and top ratings. Clients get a single point of contact who can own the full stack—UI, API, data, and deployment—so you spend less time coordinating and more time shipping. Enterprise and regulated environments I’ve worked with Fortune 500 and regulated industries (e.g. Morgan Stanley, Goldman Sachs, KPMG, Oracle Cerner) on portfolio platforms, trading infrastructure, data governance, and healthcare analytics. I’m comfortable with requirements, compliance, and working in large, structured teams. If you need a full-stack or data engineer who can own the technical side and communicate clearly, I’d be glad to discuss your project and how I can help.
$50 hourly
Pierce B.
- 5.0
- (4 jobs)
Cypress, TX
Java
User Interface Design
Data Science
ASP.NET
Algorithm Development
C#
C++
CSS
SQL
JavaScript
HTML

Bachelor's of Science in Computer Science from the University of Houston. Going on 10+ years of programming with 3 years of professional experience and a diverse portfolio of project types. Proficiencies: - C# - ASP.NET MVC and Web APIs - Razor Pages - JavaScript/TypeScript - HTML - CSS - Java - Python - SQL - C++ - R - Database Design and Maintenance - Advanced Algorithms - Communication Other skills: - Unity - Unreal Engine - Angular - Coding Interview Mentoring - Statistics and Analysis - Advanced Math
$100 hourly
Alek G.
- 4.9
- (28 jobs)
Paramus, NJ
Java
C
MySQL Programming
jQuery
CSS
C++
HTML5
Python
JavaScript
PHP

Hi! I'm just your average senior software whiz with a ton of hands-on know-how. Throughout my career journey, I've been the captain of some pretty massive squads and cooked up seriously scalable stuff using all the cool tech toys like: + Python (with Flask and Django) + JS (with React and Angular) + C++ + Java (with struts & spring). + MySQL + AWS/GCP + Stripe/Paypal/Auth.net By the way, my work clock follows Eastern Standard Time (EST), and I'm chilling right here in the good ole US of A ;)
$61 hourly
Philipp L.
- 5.0
- (9 jobs)
Saarbruecken, SL
Java
Axure RP
Design Theory
Marketing
UX & UI
Figma
Flutter
Cinematography
Adobe InDesign
Video Editing
Web Development
Dart
JavaScript
SQL
PHP

Hey, it's me Philipp 👋 (and new to upwork) I am part of a small agency with expertise in software development, UX design, and marketing. As a German-based software developer and UX designer, my strengths lie in truly listening to your needs and turning your projects into reality. I ensure your software is robust, modular, scalable, and easy to maintain. I’m also proficient in marketing and branding, helping to tie everything together through PR, print media, and online marketing activities. My Expertise 🧑‍💻 Software Development 🎨 Brand Identity Creation 🌐 Websites 🖌️ Illustrations 🐲 UX Design 🎯 Tailored Solutions for You - - - - - - What I Offer - - - - - - ➤ I’ll dive deep into your project needs and goals to ensure top-notch results. ➤ My team will deliver world-class designs based on your vision. ➤ Count on me for a quick turnaround. ➤ Enjoy unlimited revisions until you’re completely satisfied. ➤ My 8+ years of experience and 100% positive feedback guarantee exceptional work - - - - - - You should hire me if you value - - - - - - ➤ Cost-effective design services for every budget. ➤ Designs that boost sales. ➤ I listen to your needs and provide the best guidance. ➤ Trustworthy, honest, and always accessible. ➤ Highly skilled with two diplomas in IT and Marketing from Germany. ➤ GDPR compliant. I'm flexible with my working hours and pretty much always within reach during a project! I look forward to hearing from you and getting things done! Best regards from germany, Philipp
$40 hourly
Michael M.
- 5.0
- (5 jobs)
Zurich, ZH
Java
Software Development
Software Debugging
French to German Translation
German to French Translation
Software
OpenGL
C++
French
German
English
Translation

Graduate computer science student at ETHZ in Switzerland. I have written tons of Java, C, C++, Rust and Python code in my life. I also have quite a bit of experience with 3D programming and game development. Living in Switzerland. Native speaker of both French and German, also very fluent in English.
$35 hourly
asitha w.
- 5.0
- (12 jobs)
Gampaha, WESTERN
Java
Hibernate
Jakarta Server Pages
Elasticsearch
RabbitMQ
Node.js
RESTful API
Kubernetes
Docker Swarm Mode
API
Docker
Spring Framework
Database Design
Redis
Web Development
Python
JavaScript

Results-Focused Software Engineer Energetic software engineer with seven years of industrial experience developing robust code for high-volume businesses. An enthusiastic team player and deep creative thinker with a can-do attitude, phenomenal time management skills, and a strong user focus. I have developed many web and mobile apps. Passionate, responsible, and committed engineer with a get-it-done, on-time spirit and more than six years of experience in designing, implementing, and adapting technically sophisticated online web applications using Java, three-tiered architecture, and more. Proficient in JAVA infrastructure, language standards, object modeling technologies, and Application Life Cycle management 01). Engineering web development, all layers, from database to services to user interfaces(Full-Stack) 02). Highly adaptable in quickly changing technical environments with solid organizational and analytical skills 03). Managing requirements(Writing better user stories, Breaking stories into sub-tasks and experience with Jira/and leading a team ) QUALIFICATIONS SUMMARY * Design, develop and implement web applications that support day-to-day operations * Develop technical solutions that definitively improve scalability, performance, and profits * Discern essential business requirements and objectives by interfacing with stakeholders * Plan, develop, and implement successful large-scale projects from conception to completion * Expert in Java development and object-oriented analysis * Superior analytical, time management, collaboration, and problem-solving skills TECHNICAL SKILLS • Strong development experience with Java Spring Boot Framework • Strong understanding of Microservices Architecture • Strong understanding of Rest + JSON based APIs • Postgres, Oracle, Couchbase, MongoDB, DB2, MySQL • Good knowledge of GIT • Redis • RabbitMQ • Elasticsearch • Kubernetes • Docker/ docker swarm • AWS - Lambda/ EKS • Maven • Understanding of REST • Understanding of OAuth, JWT (along with exp. of implementation in Spring) (I have Experienced with OAuth2 and AWT) • Understanding of OOP and SOLID principles • English level - fluent • The experience with spring boot, container implementation, dockers or Kubernetes
$35 hourly
Ibrahim M.
- 5.0
- (17 jobs)
Muscat, MA
Java
Chat & Messaging Software
Design Thinking
SaaS
Kotlin
CMR
Model View ViewModel
Android Studio
Ecommerce Website Development
RESTful API
Firebase
Database Caching
CRM Software
Wireframing
Web Design
User Flow
UI/UX Prototyping
Mobile App

Hi 👋🏻, I’m Ibrahim, a Senior UX/UI and Product Designer 🚀 with 5+ years of experience designing user-centric digital experiences. I specialize in Figma, scalable design systems, and blending creative designs with technical insight. With hands-on Laravel backend experience, I bridge the gap between design and development to create seamless, impactful products. I thrive in Agile teams (Scrum/Kanban), delivering projects on time and exceeding expectations. Whether you need a stunning app or a data-driven solution, I’m here to help. Ready to turn your vision into reality? ⚡️ Working as a freelancer I've completed dozens of projects of different kinds and complexity for clients representing various industries. 🔥 “Imagine, Create, Inspire!” – the three words that guide my work 🔥 Services I provide:👇 ✅ Comprehensive UX Design project study ▪️ Study and analyze the project concept ▪️ Study and analyze problems and find appropriate solutions ▪️ Study the target audience and their needs ▪️ Study competitors ✅ Create (User Journey, User Flow, Site map) ✅ UX Consultant. ✅ Wire-framing. ✅ Prototyping. ✅ User Interface Design ▪️ Landing Page Design. ▪️ Web Design. ▪️ Mobile Apps Design. ▪️ iOS & Android Apps Design. ▪️ Dashboard Design. ▪️ Desktop Software. Tools I use: 👇 ✅ UI Design: Sketch (mostly), Photoshop ✅ Prototyping: inVision, Marvel, Sketch, Principle ✅ Management Tools: Trello, Jira, Asana ✅ Collaboration Tools: InVision, Zeplin, Dropbox, Google Drive MY BASIC WORKFLOW: 1️⃣ Briefing Before starting work, the client receives ready-to-fill out a brief document. Where the client fills all the necessary fields with questions that allow providing wide information about the project. 2️⃣ UX Stage. Wireframing, User flows Create wireframes to define the arrangement of interface elements and interface components that are needed for interactions. 3️⃣ UI Stage. Prototyping Put all the design components and interface elements together to show the general design direction for prototypes according to a brief. 4️⃣ Polishing and making final changes Making design changes and the final version of the design. 5️⃣ Creating UI Guidelines Finally, I provide a document with GUI Styles and elements states with descriptions for the developers' team. You will also receive a doc with an animation effects description for each element or block. 6️⃣ Delivery After all, I will send you the source files of the project. 💎My diverse portfolio spans: SaaS, platforms, AI landing pages, and marketplaces. Whether crafting intricate mobile apps, demystifying crypto projects, or designing unique POS systems, I strive to balance visual appeal with functionality in both B2C and B2B markets. I guarantee you will be satisfied with my work. ✨ Good communication between us is needed and I will make sure your requirements are understood and accomplished in time and with excellent quality ⭐. Feel free to contact me, you will have the best results ✨. 🔑𝐊𝐄𝐘𝐖𝐎𝐑𝐃𝐒: Design, UX/UI, UX, UI, User Interface Design, Landing Page Design, Web & Mobile Design, Responsive Design, Graphics & UI Design, User Experience Design, Website, Wireframing, Google, Material Design, Export Assets from Sketch, UI Research, Web Design, Sketch, App, Adobe Photoshop, Adobe Illustrator, Landing Page, Graphic Design, UI/UX Design, Mobile UI/UX Design, Material Design, UX Design, User experience design, iOS App Design, Android Design, iPad Design, iPhone Design, User Experience, Landing, Design Thinking, Interaction Design, SAAS, Designer, Adaptive, Design Expert, Update, Application design, Desktop, Visual Design, Sketch, Mobile Design, Usability, Photoshop, Mock-up, Creative, iPhone, App Design, Wireframe, Design Guru, Web-design, Job, Application, Guidelines, iOS, Logotype, Adobe, platform design, Website Prototyping, Branding, Graphic Design, Hire, Graphics, Productive, Testing, Advertising, Solutions, A/B Testing, Long term, Responsive, Android, Effective, Experienced, Management, Head of Design,
$69 hourly
Faheem K.
- 4.8
- (150 jobs)
Peshawar, DU
Java
iOS
TypeScript
UIKit
App Store Optimization
PostgreSQL
Android Studio
Apple Xcode
Mobile App
API Integration
Mobile App Design
JetPack
SwiftUI
Kotlin
Swift
Flutter
React Native
Android App Development
iOS Development
Mobile App Development

Mobile App Developer building production-ready iOS & Android apps — native (Swift, SwiftUI, Kotlin, Jetpack Compose) and cross-platform (React Native, Flutter). Shipped to App Store & Google Play. ⭐ $100K+ earned · 150+ projects · 2,378+ hours on Upwork · Fast English communication I design, build, and launch mobile apps that are fast, beautiful, and ready for real users — from a first MVP to a full production release, or rescuing an app that's stuck. WHAT I BUILD • Native iOS apps — Swift, SwiftUI, UIKit, Xcode, Combine, Core Data, CloudKit • Native Android apps — Kotlin, Jetpack Compose, Coroutines, Room, Retrofit, MVVM • Cross-platform apps — React Native & Flutter (one codebase, both stores) • AI-powered mobile apps — ChatGPT/Claude, on-device ML, smart features • App rescue & modernization — fix crashes, slow performance, rejected builds EVERY APP INCLUDES • Clean architecture (MVVM / Clean) so the code scales • Firebase or custom REST/GraphQL backend integration • Real-time features, push notifications, in-app purchases, offline-first • Pixel-perfect UI from your Figma — or designed from scratch • Full App Store & Google Play submission (I handle the review process) HOW I WORK 1. Free scoping call → fixed milestones & timeline 2. Weekly builds you can test on your own device (TestFlight / Play Internal) 3. Clean, documented, handover-ready code — no lock-in 4. Post-launch support & store-update help STACK iOS: Swift · SwiftUI · UIKit · Objective-C · Xcode · Combine · Core Data · CloudKit Android: Kotlin · Java · Jetpack Compose · Coroutines · Room · Retrofit · Hilt/Dagger Cross-platform: React Native · Flutter · Expo · Dart · TypeScript Backend & services: Firebase · Supabase · Node.js · REST · GraphQL · WebSocket Tooling: Git · CI/CD (Fastlane, GitHub Actions) · App Store Connect · Play Console RESULTS Apps shipped to both stores · MVPs delivered in 4–6 weeks · existing apps rescued and re-launched · long-term partnerships, not disappear-after-delivery freelancing. Tell me about your app idea or the app you need fixed. I'll reply with an honest scope, timeline, and the right approach (native vs cross-platform). I can start this week.
$35 hourly
Aman A.
- 4.8
- (68 jobs)
Amritsar, PUNJAB
Java
AOSP
Mobile Device Management
VPN
Firmware
Android App
Java ME
Reverse Engineering
Android NDK
Android SDK
Android App Development
In-App Purchases
Android
Kotlin
Android Studio

AOSP | LineageOS | GrapheneOS | Any CustomOS | Mobile Device Management - MDM ( KOTLIN |JAVA) Pixel perfect UI/UX implementer | Clean Code Enthusiast | Open Source Contributor | Samsung KNOX with 10+ years of experience in Android Native Development
$50 hourly
Luvai H.
- 5.0
- (9 jobs)
Ottawa, ON
Java
Windows App Development
Microsoft PowerApps
Microsoft Windows PowerShell
Node.js
Git
JavaScript
Python
Desktop Application
SQL
C++
C#
C
.NET Framework
Electron

See my portfolio at luvaihassanali.github.io/portfolio/ I have five years of experience in a professional environment programming all sorts of applications from desktop to mobile. I am familiar with many coding languages like C#, Java, Python, etc. I completed my Bachelor of Computer Science at Carleton University in Ottawa, Canada. I have an understanding of the software design life cycle and software design principles. In the work environment, my experience includes developing software used by the Canadian Armed Forces. In addition to writing code, other duties include: performing documentation for mission-critical software, integration testing in high-security military labs, and setup of automated pipelines for code repositories.
$80 hourly
Cristobal L.
- 5.0
- (52 jobs)
Buenos Aires, BUENOS AIRES F.D.
Java
CRM Software
Zoho Analytics
Zoho Creator
Swim Lane Diagram
Zoho CRM

When I select a new client to work with, my primary focus is on their humanity. My first and most important priority is to treat them with kindness and respect, not only providing a service but also offering motivation and friendship. I firmly believe good human relations are the key to the success of any project.
$50 hourly
Raed O.
- 5.0
- (19 jobs)
Siliana, SILYANAH
Java
React Native
Symfony 4
Unified Modeling Language
MySQL Programming
AWS Lambda
NestJS
MongoDB
Amazon Web Services
JavaScript
React
TypeScript
Node.js
ExpressJS
jQuery
Web Application
Business with 1-9 Employees

-Front-end (reactJs, bootstrap) -Back-end (php, Symfony, nodejs) -Mern stack ( mongoDb, expressJs, reactJs,nodeJs) -cross-platform mobile developer (react native) -Java -Photoshop -Communication I am currently working as a web instructor at GoMyCode
$75 hourly
Vilius S.
- 5.0
- (2 jobs)
Joniskis, SA
Java
Git
CI/CD
Room
SQL
Model View ViewModel
Android NDK
C++
C
JavaScript
Python
Kotlin
TypeScript
Android
SQLite

Software developer skilled in C++/C and Android, both in Kotlin and Java. Very much interested in InfoSec.
$50 hourly
Mustafa K.
- 5.0
- (12 jobs)
Ankara, ANKARA
Java
Geometry
Mathematics Tutoring
Reinforcement Learning
Machine Learning
Python
Mathematical Modeling
Statistics
Algorithm Development
MATLAB
Mathematica
Mathematics

I have been teaching/tutoring math and doing related research for over 18 years now, I have taught at Northeastern University and Turkey. I have a PhD in Mathematics (an application of mathematical modelling in biology). I can help with mathematical research, especially computational/statistical research. My research required data analysis and modelling, which were conducted in Matlab and related tools (especially Simbiology). Being an active Project Euler contestant, I am extremely interested in designing and executing innovative algorithms for computational math questions (my preferred programming language is Java). Recently I was able to do some work related to Computational Geometry. I have created my own code in Java for this work. I am also experiencing with CGAL libraries. As someone teaching college level math for more than 15 years, I can provide online tutoring in almost any field of math and prepare math questions and/or detailed solutions for all levels: -All college level math/statistics -SAT, GRE, GMAT Quantitative Sections -Multiple Choice Math Questions -For various college level courses (Highly technical, purely algebraic or word problems) I have also done a lot of LaTex typing, for teaching and for my own research. I can type the whole document or help with editing. I have been doing freelance work in tutoring and translation for more than 14 years now. I have translated Jordan Ellenberg's "How Not To Be Wrong" into Turkish, which is in revision for publication.
$60 hourly
Anthony T.
- 5.0
- (12 jobs)
Belmont, CA
Java
PostgreSQL
ExpressJS
Tailwind CSS
Thymeleaf
React
Node.js
Selenium
Spring Framework
Bootstrap
JavaScript
CSS
HTML
SQL
Python

I’m a multilingual PERN Full-Stack Developer with 3 years of professional work experience working at some of the largest gaming companies in the world, as well as a few start-ups. My biggest strengths are JavaScript, SQL, Html, CSS Java, NodeJS, Express.JS, ReactJS, PostgreSQL, Spring Framework, Thymeleaf, Bootstrap, Python, Heroku, Cloudflare, Selenium, Firebase, and REST API. I have experience working in Full-Stack development, as well as web automation.
$40 hourly
Darwin T.
- 5.0
- (5 jobs)
Paranaque, METRO MANILA
Java
Testing
Process Improvement
Electronic Data Interchange
SAP ERP
SQL Programming
dbt
Snowflake
Databricks Platform
Data Science
Artificial Intelligence
Machine Learning
Digital Marketing
JavaScript
SQL
Python
Google Cloud Platform
AWS Glue
Microsoft Azure
Tableau
Microsoft Power BI
Looker Studio
Adobe Analytics
Google Analytics 4

I help businesses analyze and implement efficient processes to achieve improved productivity, continuous growth and sustainable profit with the advantages for digital platforms and technology.
$50 hourly
Dominic P.
- 5.0
- (8 jobs)
Aylesbury, ENG
Java
IBM SameTime
HCL Domino
C++
System Automation
HCL Notes
IBM Lotus Notes Traveler
System Administration
Python

Specialties: Python Java Automating system administration Bespoke development for systems integration Postfix mail server HCL Domino HCL Lotus Notes Lotus Script Add-in Development (C & C++) Formula Language Bespoke application development Mail file customisation Updates to existing applications Domino/Notes integration with 3rd party products
$35 hourly
Ahmad Q.
- 5.0
- (4 jobs)
Amman, AMMAN
Java
Microsoft SharePoint Development
MySQL Programming
Spring Boot
WebRTC
NoSQL Database
MongoDB
SQL
Liferay
Angular
React
CSS 3
Node.js
HTML
JavaScript

I am a Technical Lead with 7+ years of hands‑on experience delivering enterprise‑grade digital platforms, portals, and automation solutions across government and private sectors. I specialize in architecting scalable, secure, and high‑performance solutions using Liferay DXP, AI-driven components, and modern integration frameworks. I have successfully contributed to multiple end‑to‑end projects, including products, portals, and digital services aligned with Saudi DGA and UAE Smart Government standards. 🔧 Core Expertise Liferay DXP - Liferay 7.4 / 7.3 development, customization, and administration - Client extensions, OSGi modules, service builder, REST APIs - Liferay search tuning, Elasticsearch DSL, Blueprints, and AI‑assisted search - SSO, SAML, OAuth2, and enterprise security compliance - Multi‑site architecture, content governance, workflows, and DXP cloud integrations AI & Intelligent Automation - Conversational AI, chatbots, and real‑time communication systems - AI‑powered search, recommendations, and personalization - Integration of AI services into Liferay portals (NLP, classification, automation) - Data-driven decision support for digital government services Backend & Integration - Java (Spring Boot), Node.js, Express, PM2 - REST / SOAP integrations, microservices, API gateways - SQL & NoSQL databases - Doxis: CSB, WebCube, Client Admin, and enterprise document management Frontend & User Experience - React, Angular, Vue - SharePoint WebParts - Responsive UI, component libraries, and modern UX patterns 🏛️ Digital Government Alignment (Saudi & UAE) I design and deliver solutions aligned with: - Saudi DGA (Digital Government Authority) standards - Nafath Implementation - UAE Pass Implementation - NCA cybersecurity controls - UAE Digital Government & Smart Services frameworks - National single sign-on, unified service journeys, and interoperability - High-availability architectures for mission‑critical government portals
$60 hourly
James B.
- 5.0
- (1 job)
Pickerington, OHIO
Java
SQL
Kubernetes
React
C#
PHP
HTML
Docker
JavaScript

With 20+ years of experience, I help businesses modernize and scale their applications - from migrating legacy systems to building high performance web apps with Next.js, React and Docker. I deliver reliable, scalable solutions that solve complex technical challenges. Experience includes: - Delivered enterprise‑grade applications across multiple platforms, improving performance and reducing downtime. - Identified and implemented process improvements that streamlined workflows and reduced costs. - Diagnosed and resolved complex technical issues across unfamiliar systems, ensuring business continuity. - Rapidly adopted new technologies and frameworks to meet evolving client needs. - Applied deep knowledge of network protocols to design secure, reliable integrations. Skills include: Languages: TypeScript, JavaScript, PHP, C#, Java, C/C++ Frameworks: Next.js, React, Angular, .NET Platforms: Docker, Kubernetes, AWS EC2, Azure App Services Architectures: Single Page Applications, REST APIs, SOAP Web Services My passion is helping people take an idea or design and make it into a working system as efficiently as possible as well as locating and resolving issues with existing applications.
$60 hourly
Vinicius N.
- 5.0
- (18 jobs)
Conselheiro Lafaiete, STATE OF MINAS GERAIS
Java
Mobile App Development
In-App Purchases
Hybrid App Development
iOS
Firebase
CakePHP
Android
Flutter
MySQL Programming
Dart
API
HTML
PHP
CSS

I’m Vinicius Assis Neves, a Senior Mobile and Web Developer from Brazil with extensive experience in cross-platform development, specializing in Flutter. Over the past several years, Flutter has been my core technology for building efficient, high-quality mobile applications. In addition to Flutter, I have strong experience in web development, Android development, and basic knowledge of iOS development. I am proud to be an Upwork Top Rated Freelancer, recognized for my outstanding performance and consistent success across both short- and long-term projects. My professional journey began as a mobile developer at Lemon Inteligência, where I started working with Flutter. Thorought, I also took on a part-time role on Upwork for an Australian company. Eventually, I transitioned to working mostly on Upwork, where I’ve since honed my skills in system architecture, mobile and web development, web scraping, security, and best coding practices. My skill set includes: • Mobile App Development (Flutter, Android) • Backend Development (Node.js, PHP, AWS) • Web Development (CakePHP, WordPress) • Database Management (MySQL, PostgreSQL) • Cloud Architecture (AWS services, including Lambda, API Gateway, and S3) Although Flutter development remains my primary focus, I am always eager to learn new technologies and continuously expand my skill set. I’ve had the privilege of working on a wide variety of projects, from mobile apps to complex web systems, and I’m confident that we can achieve great results together. Feel free to reach out anytime to discuss your project or ask questions about my experience. I’m excited to collaborate with you!
$68 hourly
Claude B.
- 4.7
- (47 jobs)
Greenville, SC
Java
Node.js
pandas
Flask
React
Database Modeling
UX & UI
HTML5 Canvas
QuickBase
Python
CSS
JavaScript
HTML5
HTML
JSON

Former QuickBase specialist—I now focus primarily on full-stack Python/React and quant/trading engineering. Senior Full-Stack Developer specializing in Python (Flask) + React and data automation/integrations. I build production-ready web apps, dashboards, and automation tools that save teams time and make data usable. Recent work includes: A StockSignals Flask app that computes stock signals + volatility/regime analytics and generates allocation/action-plan outputs with a modern Tailwind UI. A full-stack financial dashboard with React + Flask, Chart.js visualizations, and deployment-ready structure (Docker/scripts), including Stripe integration notes. Automation utilities for ingesting/processing data and producing reliable reports and exports. If you need a developer who can own the project end-to-end—UI, API, data pipelines, integrations, and deployment—I can help. I’m a senior full-stack developer who builds production-ready business software that connects systems, automates workflows, and turns messy data into clear dashboards and decision tools. Your portfolio shows consistent strength in Python backend development (Flask/FastAPI-style REST), React frontends, and data automation/analytics—plus domain experience in financial/trading tools (signal generation, allocation/portfolio logic, and visualization). What you can hire me for Full-stack web apps (React + Python/Flask) I build clean, responsive UIs and pair them with reliable REST APIs, background jobs, and integrations. Example work includes a multi-service financial dashboard with a React frontend, Flask backend, deployment scripts/Docker, and Stripe integration notes. Data automation + reporting (Python, Pandas, Excel/CSV pipelines) If you’re spending hours moving data between systems or reconciling spreadsheets, I can automate it with repeatable pipelines and validation. My work emphasizes correctness, auditability, and clear output (tables, charts, exports). API integrations + system glue work I integrate third-party APIs and internal systems with sane error handling, throttling/rate-limit awareness, caching, and structured outputs. In StockSignals, for example, the app handles API throttling/retries and organizes results into UI-friendly payloads. Trading / finance engineering (signals, allocation, analytics) I’ve built a working Flask app (StockSignals) that generates stock signals, volatility/regime-style analytics, and produces allocation/action-plan outputs—presented in a clean Tailwind UI with charts. How I work (what clients can expect) Clear scope + fast first delivery: I aim to ship a usable V1 early, then iterate. Production-minded implementation: structured errors, maintainable code, and deployable setups (Docker/scripts when relevant). Communication: frequent updates, explicit assumptions, and no surprises. Typical deliverables React web UI (responsive, clean UX, charts/tables as needed) Python/Flask REST API (auth if needed, CRUD, integrations, background jobs) Automation scripts / ETL (Pandas pipelines, exports, validations) Deployment support (Docker/Procfile scripts, environment variables, startup docs)
$50 hourly
Luca-Florin D.
- 5.0
- (5 jobs)
Bucharest, BUCUREŞTI
Java
Android
Flutter
Linux
PostgreSQL
React
MongoDB
Node.js
JavaScript
Python
HTML
CSS

Hey there! 👋🏻 👨🏼‍💻 I'm an experienced Full Stack Developer, with expertise in both Web and Mobile Applications. I can also provide services in the area of scripting/automation (for example crypto trading bots, data scrapers, social media channel automation, etc.) Depending on the project, I could also provide services in terms of server configurations and deployments, as well as security consultancy and testing with no extra fees. Some keywords describing my areas of expertise are as follows: Backend development: - Java (Spring framework) ☕️ - NodeJS (ExpressJS) 📝 - Python (Flask) 🐍 Frontend + Mobile development: - ReactJS ⚛️ - Flutter 🎯 - Native Android (written in Java) 🤖 Cloud - deployment: - AWS ☁️ - GCP ☁️ - Docker 🐳 Database systems: - MySQL 🫙 - PostgreSQL 🐘 - MongoDB 🍃 My experience comes from both professional work and personal projects. If you're interested in working together, don't hesitate to hit me up! 🚀
$35 hourly
Venkata Sai Kumar N.
- 5.0
- (6 jobs)
Bangalore, KARNATAKA
Java
JavaScript
CSS
HTML5
AngularJS
jQuery
ITIL
AJAX
IT Service Management
Python

ServiceNow Consultant with 7 years of experience, I specialize in ServiceNow development, implementation, and process design, delivering efficient and scalable solutions. ServiceNow Development Expertise -Service Portal Expert - ITSM solutions - Third-party integrations - CMDB implementation - Client-side scripting: client scripts, UI scripts, catalog client scripts, UI actions, UI policies - Server-side scripting: script includes, business rules, scheduled jobs, UI actions, ACLs - Table administration: creating/modifying tables and fields - Service catalog implementation: catalog items, variable sets, order guides, record producers - Workflow development - Email notifications and email scripts - Data import/export -Log Export Service Third-Party Integrations - JIRA - Salesforce - Microsoft SCCM - Amazon and Azure Cloud - PagerDuty - Splunk - Google Vision API - Ivanti ServiceNow Modules - Incident Management - Problem Management - Change Management - Service Catalog - Agile Development - CMDB - Discovery - Knowledge Management - Service Portal Front-End Development Proficient in web application development using HTML5, CSS3, AngularJS, and Bootstrap 3.
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