🏅 Top Rated Plus Freelancer
🕒 1400+ hours on Upwork
✅ 100% Job Success Score
I am a results-oriented bilingual with 12+ years of experience professional who is willing to work with clients worldwide. In my case, I am open to working with startup companies, small businesses, and even multi-national firms. I am deeply involved in all my projects from start to finish. I listen to my clients attentively and provide them a vision for what they want, and then I collaborate with them to create and execute a plan of action. I continuously offer my clients the pros and cons of each choice they make and convey my recommendations for their selections.
I would like to give quick short profile summary as below
Skills
----------------------------------------------------------------------------------------
• 11+ Years of IT Experience relevant to Java with BFSI domain like Banking & Insurance
• Core skills SpringBoot, RESTful webservices, Microservices, JPA
• Experience in Unit Testing with JUnit5, Mock/Mockito
• Good experience with working on front end applications using JavaScript, JQuery and Bootstrap.
• Strong experience with Agile or Scrum methodologies.
• Good communicator in English
• Experience with SQL Databases (e.g. Oracle)
• Strong experience with GIT/BitBucket, JIRA, Jenkins, Confluence, Docker.
• Good experience working with Tomcat, Jboss, WildFly
• Experience working on Cloud technologies (AWS)
• Experience using Apache Solr
• Good Experience developing unit / integration test cases using Junit /TestNg.
• Experience in Integration, Component and End-to-End Testing
• Knowledge of Behavior Driven Development (BDD) for automated acceptance tests
• Good ability to understand and work with code developed by other developers.
• Very comfortable to work independently with minimal supervision
Why me?
--------------------------------------------------------------------------------------------
-Provide High Quality Services
-Delivers Bug Free Code
-Good Listener and Great Communication Skill.
-Uses Latest technology for Development.
Services I provide
----------------------------------------------------------------------------------------
*Software Development
*Web application, Development & Maintenance
*Creating Template and Reports
*Finding Bug and Resolve.
*Solve Programming Problems.
I would be happy if employed by you and will work to the best of my ability.
MySQL
JavaScript
Java
Git
Swing
JavaFX
Spring Framework
Spring Boot
Web Service
Microservice
RESTful API
RESTful Architecture
AI Chatbot
AI Development
Hayk H.
Yerevan, Armenia
$50/hr
5.0
13 jobs
• Software Engineer with over 12 years of experience in designing, developing, and supporting enterprise-grade software systems.
• Proficient in Java, Spring / Spring Boot / Spring AI / Quarkus / LangChain4J
• Experienced with Groovy / Grails / Micronaut and C# / .NET
• Hands-on experience building AI-powered applications and intelligent agents using Large Language Models (LLMs) integrated via LangChain4J and Spring AI
• Build custom AI developer tooling — skills, plugins, and coding knowledge-base projects — that codify engineering best practices into reusable workflows
• Practical experience using AI coding agents and assistants — Claude Code, Codex, and Grok — to accelerate development, refactoring, and code review workflows
• Proven track record in enterprise application development and high-availability system support
• Core expertise across Web, Desktop, and Cloud-based solutions
• Strong ability to collaborate effectively in multicultural and distributed teams
• Extensive hands-on experience in software research, design, development, testing, and deployment
MySQL
JavaScript
Docker
Apache Maven
C#
Spring Boot
Grails
Git
Spring Framework
Apache Groovy
Agile Software Development
RabbitMQ
Elasticsearch
OpenAI Codex
Stripe
Core Java
Claude
Aagam S.
Surat, India
$23/hr
4.9
5 jobs
Full-Stack Engineer | 2,200+ Upwork Hours | 100% Job Success
I design clean architectures and take full ownership of the code I ship — from database to UI.
I'm a Full-Stack Engineer with over 6 +years of experience building high-performance web applications and complex API networks. With a flawless 100% Job Success Rate on Upwork, I specialize in bridging heavy enterprise backend ecosystems with modern, intelligent automation.
⚡ Core Architecture & Integration Expertise:
● AI & LLM Integration: Embedding OpenAI, Anthropic, or Gemini APIs for secure context retrieval, automated data workflows, and intelligent feature layers.
● Custom API Architecture: Designing secure, high-throughput RESTful and GraphQL API gateways from scratch using Java (Spring Boot) and Node.js/Express.
● Resilient Third-Party Systems: Orchestrating fault-tolerant integrations with webhooks, external CRMs, and payment gateways (Stripe, PayPal) with clean failover handling.
● Real-Time Streams & UI: Leveraging WebSockets for live, low-latency data dashboards built on high-performance Angular and React.js frontends.
🛠️ The Technical Toolkit:
● Backend: Java, Spring Boot, Node.js, Express.js, Groovy Grails, Gradle, WebSockets
● Frontend: Angular, React.js, JavaScript (ES6+), HTML5, CSS3, SASS/LESS, Bootstrap
● Databases & Tools: MySQL, MongoDB, PostgreSQL, Git, Postman, Jira
🔷 The Senior Standard I Bring:
● Logic-UI Separation: I isolate core computations from front-end components, ensuring your platform stays secure, stable, and effortless to scale.
● AI-Native Velocity: I use an optimized, AI-native development workflow to build, test, and audit production-grade code faster than traditional timelines.
● Product Ownership: I proactively review specifications to optimize API costs, eliminate bottlenecks, and ensure clean, rapid delivery.
If you need a hands-on engineer who can take real ownership of your technical build and execute cleanly, let's connect!
Java
Grails
MySQL
HTML
JavaScript
Node.js
CSS
React
HTML5
CSS 3
Software Debugging
Linux
ExpressJS
GraphQL
Websockets
Software Development
Yatin S.
Fazilka, India
$16/hr
4.9
9 jobs
Senior Java Developer | Spring Boot Expert | Microservices | AWS | AI-Assisted Development
I help businesses build scalable backend systems, enterprise APIs, and cloud-native applications using Java, Spring Boot, Hibernate, Microservices, AWS, PostgreSQL, MongoDB, Kafka, and modern AI-assisted development tools.
With strong experience in Java backend development, I specialize in:
✔ Java 8/11/17+ Application Development
✔ Spring Boot & Microservices Architecture
✔ REST API Development & Third-Party Integrations
✔ Hibernate / JPA / Performance Optimization
✔ PostgreSQL, MySQL, MongoDB
✔ Event-Driven Systems (Kafka, Messaging)
✔ AWS, Docker, Kubernetes
✔ Secure APIs (Spring Security, JWT, OAuth)
✔ Legacy System Modernization
✔ Full-Stack Development (Angular, Node.js)
✔ AI-Assisted Development using ChatGPT, Claude AI, and GitHub Copilot
What I Deliver
• Production-grade Java Spring Boot applications
• High-performance backend APIs
• Scalable microservices architectures
• Enterprise integrations and data-driven systems
• Performance tuning, debugging, and system optimization
• Cloud-ready deployments on AWS
Why Clients Hire Me
I focus on clean architecture, maintainable code, and practical solutions not overengineering.
By leveraging modern AI tools like ChatGPT, Claude AI, and GitHub Copilot, I accelerate development, improve code quality, generate documentation, and speed up debugging while ensuring every solution is thoroughly reviewed and production-ready.
Whether you need:
• A Spring Boot developer for a SaaS platform
• A Java backend developer for APIs, integrations, or cloud applications
• Help with microservices, performance optimization, or legacy modernization
• A developer who combines deep engineering expertise with AI-assisted productivity
I can help.
I've worked on complex backend systems involving real-time event processing, enterprise integrations, database-intensive workflows, cloud-native deployments, and event-driven architectures.
If you're looking for a reliable Java/Spring Boot expert who takes ownership, communicates proactively, and delivers scalable solutions on time, let's discuss your project.
Java
Spring Boot
Angular
Java Servlet API
Java Collections Framework
Web Development
Spring MVC
MySQL
React
Node.js
Next.js
AI Development
Oracle
AWS Cloud9
Claude
Legal
Legal Case Management Software
Legal Software
Nazariy M.
Lviv, Ukraine
$38/hr
5.0
29 jobs
I am a Java developer with over 14 years of experience building full stack applications, enterprise systems, and SaaS platforms 🚀
My focus 🎯 is on using Java, Spring Boot, React.js, PostgreSQL, and AWS to deliver reliable, scalable software. As a Java developer, I have delivered dozens of projects across industries and use cases.
My backend work is built entirely with Java. I create secure APIs and microservices using Spring Boot. I have deep experience in system architecture, backend performance, and database design. Every project I take as a Java developer is written with clean, maintainable Java code. I know how to structure services that scale.
As a Java backend developer, I have built and maintained systems for high-load traffic, third-party integrations, and complex business logic. I manage full backend pipelines, from architecture and development to deployment and monitoring. I use Spring Boot and follow best practices every Java developer should apply.
I also work as a full stack Java developer, connecting Java backends with React.js and JavaScript frontends. I create dashboards, user interfaces, and admin tools that are fast, stable, and fully integrated. I know how to deliver full stack features without bottlenecks.
I have led teams as a senior Java developer, mentoring other developers, reviewing Java code, and improving team performance. My clients rely on me not just for development, but also for decisions about architecture, data structure, and deployment strategy. As a Java developer, I care about the full picture.
In most projects, I take the role of a Java spring developer and own the backend infrastructure. I work with Docker, PostgreSQL, REST APIs, and cloud services. I often work independently, taking full responsibility for both backend and frontend parts as a full stack developer.
Being a professional Java developer means I deliver production-ready code, meet deadlines, and communicate clearly. I work well with teams or as a solo contributor. My background as a Java backend developer and Java spring developer allows me to adapt to different project needs.
If you need a Java developer who can work on backend systems, full stack features, or cloud-based platforms, I am ready to help. Whether you need a senior Java developer, a Java backend developer, or a reliable full stack Java developer, I can take your project from idea to production.
🛠️ Core Skills:
- Java developer
- Java backend developer
- Full stack Java developer
- Java spring developer
- Spring Boot microservices
- React.js and JavaScript
- PostgreSQL, AWS, Docker
Let’s talk if you need a results-driven Java developer to join your team or take over delivery.
‼️ Message me for a free 40-minute consultation ‼️
Java
HTML
MySQL
PHP
Web Development
JavaScript
CSS
Node.js
React
SQL
Python
Spring Boot
Software Development
Spring Framework
MongoDB
API
NodeJS Framework
API Integration
Web Application
SaaS
Maksym G.
Chernivtsi, Ukraine
$33/hr
5.0
69 jobs
I am a Senior Fullstack Developer with over 15 years of hands-on experience in building and scaling Java , C# / Net , Angular applications for startups, enterprises, and SaaS platforms.
Currently, I’m working as the Chief Technology Officer at InventorSoft, a software development agency specializing in web and mobile solutions. I bring a strategic mix of technical depth, team leadership, and product vision to every project.
Why hire me🧐:
📌 Expert in Scalable Java and .Net Architectures
- Over 15 years of experience in developing Java, .Net, C#, Angular scalable applications from different domains.
- Backend systems built with Spring Boot (15+ years) – Delivered scalable microservices and high-performance business logic for enterprise-grade applications.
- ORM & data access with Hibernate – Applied advanced ORM techniques for efficient database interactions, query optimization, and data integrity in distributed systems.
- Frontend development with Angular & Thymeleaf
Designed and delivered 200+ robust backend systems for SaaS products, e-commerce platforms, and enterprise clients.
📌 Cloud-Native Platform Engineering
Specializes in building secure, scalable, cloud-native platforms using leading cloud providers:
- 8+ years of production experience with AWS – Deployed scalable, secure, and high-availability applications.
- 9+ years of hands-on Azure expertise – Delivered enterprise-grade solutions with Azure App Services, Azure DevOps, and SQL/Azure Storage.
- 5+ years of experience on Google Cloud Platform (GCP) – Built and deployed containerized microservices using GKE, Cloud Run, and Firebase.
📌 API-First & Cloud-Native System Design
- Strong background in API integration and microservice architecture.
- Created high-performance APIs for platforms serving 50K+ users, ensuring seamless third-party integration and scalability.
- Experienced in Docker & Kubernetes, enabling CI/CD pipelines and resilient containerized systems.
📌 Full-Stack Leadership & Agile Team Management
- Led and mentored teams of 5–25 developers through all stages of the SDLC—requirements gathering to deployment and maintenance.
- Specialized in building cross-functional teams for backend-heavy systems, modern UIs (React, Angular, Thymeleaf), and DevOps automation.
My latest achievement as a Software Architect:
🤝 Partnered with 45+ SaaS companies to design and deliver secure, scalable platforms using Spring Boot, AWS, and modern cloud services.
🚀 Helped 10 tech startups scale from MVP to production—selecting the right tech stack, defining cloud-native architecture, and assembling strong dev teams.
💼 Enabled 5 client acquisitions through the development of enterprise-grade software that attracted major buyers and investors.
🏭 Led a digital transformation project for a multi-billion-dollar oil company, delivering a secure, API-first platform that automated mission-critical operations.
🧩 Technologies I Specialize In
- Languages/Frameworks: Java, C#, .Net, Spring Boot, Hibernate, Thymeleaf, .Net Core
- Cloud Platforms: AWS (8+ years), Azure (9+ years), Google Cloud (5+ years)
- DevOps Tools: Docker (7+ years), Kubernetes (5+ years)
- Integration & Architecture: RESTful API integration, microservices, clean architecture, CI/CD pipelines
Clients that I am proud of:
💻 Shoeby – A fashion retail platform focused on modernizing the e-commerce experience with intuitive UI, product personalization, and seamless shopping journeys.
💻 CellRebel – Provides advanced mobile network analytics, helping telecom companies improve coverage and performance based on real user data.
💻 Blade – A technology-powered aviation company offering urban air mobility services, including helicopter and seaplane flights.
💻 Matics – A real-time operational intelligence system for manufacturers, offering production insights and process optimization across the factory.
💻 MedischeScholing – A medical e-learning platform that enables healthcare professionals to access, register for, and track accredited training and certifications.
➡️ Learn more about other projects on the InventorSoft portfolio
Keywords:
Java, Backend, Developer, Fullstack, Web, Cross-Platform, Mobile, Application, AI, OpenAI, Service, App, Development, Engineer, Integration, Build, Website, Expert, Spring boot, MySQL, Development Team, Integrated, SaaS Platform, remote, Full-stack, Senior, Software, Client Management, GraphQL, API, .NET, Asp.net, Programmer, Technical Lead, Dashboard, MVC, Developers, ASP.NET, AspNetZero, core, software, MAUI, C#, Angular, .Net, Core, Principal, Performance, Scalability, Microsoft, Blazor, SQL, Server, Frontend, React, Ruby on Rails, RoR/React, front-end, Tailwind, feature, ROR, TailwindCSS, Technical Staff, JavaScript
Java
JavaScript
RESTful API
Spring Framework
MySQL
HTML
Amazon Web Services
Full-Stack Development
Back-End Development
Core Java
CSS
Spring Boot
Database
Hibernate
API
How it works
Post a job for freePost a job
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
“Upwork provides an umbrella-level of security. I can see a talent’s work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.”
KD
Kim Darling
Emerald Tiger
“Upwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.”
DM
David Merry
Kinetic Investments
“Our very specific requirements can be a challenge—With Upwork, we’re able to access a bigger community to ensure the success of our projects.”
KK
Katja Krohn
Summa Linguae
How do I hire a Groovy Developer & Programmer on Upwork?
You can hire a Groovy Developer & Programmer on Upwork in four simple steps:
Create a job post tailored to your Groovy Developer & Programmer project scope. We’ll walk you through the process step by step.
Browse top Groovy Developer & Programmer talent on Upwork and invite them to your project.
Once the proposals start flowing in, create a shortlist of top Groovy Developer & Programmer profiles and interview.
Hire the right Groovy Developer & Programmer for your project from Upwork, the world’s largest work marketplace.
At Upwork, we believe talent staffing should be easy.
How much does it cost to hire a Groovy Developer & Programmer?
Rates charged by Groovy Developers & Programmers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.
Why hire a Groovy Developer & Programmer on Upwork?
As the world’s work marketplace, we connect highly-skilled freelance Groovy Developers & Programmers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Groovy Developer & Programmer team you need to succeed.
Can I hire a Groovy Developer & Programmer within 24 hours on Upwork?
Depending on availability and the quality of your job post, it’s entirely possible to sign up for Upwork and receive Groovy Developer & Programmer proposals within 24 hours of posting a job description.