Hire the best Java developers

Check out Java developers with the skills you need for your next job.
Clients rate Java developers
Rating is 4.8 out of 5.
4.8/5
based on 27,630 client reviews
  • $90 hourly
    I’m a programmer with more than 10 years of experience who can work in different programming langauges using different frameworks. I can create any application type: ● web based ● desktop If I don’t know any programming language or framework which you want to use to build your application then I can learn it in couple days. SKILLS ● PHP ● Javascript ● jQuery ● Bootstrap ● AJAX ● MySQL/PostgreSQL ● REST API ● HTML/HTML5 ● CSS/CSS3 ● C/C++ ● Ruby (and framework Ruby On Rails) ● Python ● Java ● CUDA Computation ● OCR (on C/C++, Python, Java) EXPERINCE ● Freelance 5+ years (up to July 2014). I was working hard to learn what clients want to see, to learn different programming languages and frameworks. Those years taught me to learn new things everyday to provide high-quality solutions for my client. Here's some of my works (PHP, MySQL, HTML, CSS, JavaScript): ○ dev.louepartout.com ○ kilosolution.com ● Swiss Interactive Software GmbH (August 2014 - December 2014). Front-End and Back-End developer for gambling platform and websites (using the platform). Here's you can see some of the websites we built (PHP, MySQL, HTML, CSS, JavaScript, Bash): ○ betboro.com ○ sports.flutterclub.com ○ sports.princessstar.com ○ globalbet.eu ● Ad.net (February 2015 - Present).
    vsuc_fltilesrefresh_TrophyIcon Java
    HTML5
    CSS 3
    C++
    MySQL
    React
    Bot Development
    Automation
    Data Scraping
    Python
    PHP
    Data Extraction
    Web Crawling
    JavaScript
    Selenium
  • $105 hourly
    ** HubSpot Design Certified ** Recently recognized as a HubSpot Champion User Worked on many different types of applications and with many different technologies. Quickly learn new programming languages and technologies. Can also read and understand existing code to find and fix bugs. Have 26 years experience in IT. Have a Bachelors Degree in Math as well as an MBA. I have worked with many programming languages including COBOL, Visual Basic, C, C++ and Java. Currently working on projects utilizing Angular, JQuery, Java Script, CSS, HTML5, Hubspot and Flex. I am familiar with content management systems. I have worked on front end designs/pages and back end services. Have done responsive development, desktop applications, and mobile applications.
    vsuc_fltilesrefresh_TrophyIcon Java
    CSS
    HTML
    Content Management System
    HubSpot
    CMS Development
    Website Customization
    Agile Software Development
    Blog Development
    Inbound Marketing
    Templates
    Business with 100-999 Employees
    iOS Development
    Android App Development
    JavaScript
  • $40 hourly
    Creative back-end developer dedicated to building elegant solutions that meet business demands. Over 10 years of experience developing software of different scales ranging from small startups to large enterprise applications. Implemented back-end as well as front-end with the main focus on the former. Good communication skills proven through work experience in distributed team projects. 𝗕𝗮𝗰𝗸-𝗘𝗻𝗱 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Java, Kotlin JavaEE, Spring, Guice JDBC, JPA, Hibernate JUnit, Mockito, Cucumber, FitNesse Maven, Ant Git, SVN Jenkins, Sonar TypeScript, JavaScript Node.js Jest Webpack 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: MySQL, MariaDB, Oracle MongoDB, AWS DynamoDB 𝗖𝗹𝗼𝘂𝗱 𝗣𝗿𝗼𝘃𝗶𝗱𝗲𝗿𝘀: Amazon Web Services 𝗦𝗲𝗮𝗿𝗰𝗵 𝗘𝗻𝗴𝗶𝗻𝗲𝘀: Solr, AWS Elasticsearch 𝗙𝗿𝗼𝗻𝘁-𝗘𝗻𝗱 𝘁𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Vue HTML, CSS, Bootstrap Should you need any further information, please do not hesitate to contact me.
    vsuc_fltilesrefresh_TrophyIcon Java
    Distributed Computing
    Node.js
    Microservice
    Amazon Web Services
    NoSQL Database
    Spring Framework
    TypeScript
    JavaScript
    SQL
    MongoDB
  • $40 hourly
    With over 8 years of experience as an Oracle certified developer, I specialize in JavaFX desktop application development, boasting expert knowledge of the JavaFX framework. My forte lies in applying architectural patterns and adhering to best practices, resulting in the creation of clean, expandable code for your projects. I am passionate about delivering robust and user-friendly applications, always striving to guarantee client satisfaction. My dedication extends beyond technical expertise; I am also a proficient communicator and an effective team player, ensuring seamless collaboration on every project. In addition to my core skills, I am well-versed in essential development tools like Git, Maven, Gradle, Eclipse, IntelliJ IDEA, and JProfiler. This comprehensive skill set enables me to navigate your projects with precision and efficiency. Let's work together to transform your Java development goals into reality.
    vsuc_fltilesrefresh_TrophyIcon Java
    JetBrains IntelliJ IDEA
    Desktop Application
    JavaFX
    OpenGL
    MQTT
    User Interface Design
    Game Development
    SQL
    Git
  • $70 hourly
    14 year software development experience, 8 year lead engineer/architect experience. Fluent in spoken and written English. Passion for learning new technologies. Solid knowledge of SDLC and agile software development methodologies. Tech stack: Java, Spring Boot, JPA/Hibernate, SQL, Redis, DynamoDB, MongoDB, AWS, Microservices, Event-driven architecture, Docker
    vsuc_fltilesrefresh_TrophyIcon Java
    RESTful Architecture
    Spring Security
    SQL
    Amazon Web Services
    Spring Boot
    Microservice
    Redis
    Amazon DynamoDB
    MongoDB
  • $50 hourly
    Android development and maintenance Complete applications, prototypes, proof of concept, maintenance, legacy support Integration with popular social media platforms Google resources e.g. Maps, Analytics, ads E-commerce, in-app purchases, point-of-sale tools Technology: - Programming languages: Java, Kotlin, SQL - Architecture: MVVM, MVP, clean code - Professional software engineering tools and methodologies
    vsuc_fltilesrefresh_TrophyIcon Java
    RESTful Architecture
    JavaFX
    JSON
    Git
    Kotlin
    Android App Development
    In-App Advertising
    Smartphone
    Android SDK
    API Integration
    SQLite Programming
    Chat & Messaging Software
    Android
  • $50 hourly
    I'm a full stack software developer with experience in Java and Android projects. I focus on service and delivering the best experience to my clients, while providing quality software on a timely fashion. I have experience with various technologies to help fulfill any kind of job. I'm also open to having a chat with my customers, if they so desire, so we can arrange any details about the job. I also have experience with Cyclos Banking System Software, providing consultant services to small-medium banks. I've done several integrations with 3rd parties software with it, also developed plenty of aditional feature for it too, like bank statements and import of payments. I have experience on the following languages and technologies: -Java: Everything enterprise, Servlets, JSF, Primefaces and JPA. -JavaScript: pure Script, NodeJS and AngularJS. -PostgreSQL, SQLServer, SQLLite I also have experience providing products and solutions for financial institutions. My biggest desire is to serve my customers as if it was me requesting the product, I always strive to deliver the best software since I wouldn't settle for less.
    vsuc_fltilesrefresh_TrophyIcon Java
    Email Campaign Setup
    J2EE
    Android App Development
    Microsoft SQL Server Programming
    API Development
    MySQL Programming
    Java Servlet API
    JavaScript
  • $18 hourly
    I'm a Fullstack developver My skills: Java, Javascript, Python and React I'm good at solving problem.
    vsuc_fltilesrefresh_TrophyIcon Java
    Google Chrome Extension
    React
    Python
    JavaScript
  • $120 hourly
    10 years of experience working on native Android applications for high profile clients and businesses. 100% Job Success | 11,000+ Hours | Top Rated Plus | 5 Star Reviews Exclusively From planning, developing and publishing to maintaining and supporting high quality Android applications. I hope you see the experience displayed in my profile as an indication of my reliability. ✔︎ Constantly updating my knowledge with the most recent design patterns and code conventions; ✔︎ The delivery of a product that respects the highest standards of usability, performance and appearance is guaranteed; ✔︎ Great cost-benefit by delivering faster and higher quality products than the average; ✔︎ Flexible availability to always meet the client's needs. Vast experience managing development teams located in different places around the world. As an example, I've been managing a team that averaged 7 developers located in different countries, such as Canada, Ukraine, Pakistan, India and Brazil. ✅ Mobile Development Leader; ✅ Native Development; ✅ Kotlin and Java Expert; ✅ Clean code, DRY and KISS principles; ✅ Unit and automated testing; ✅ Well documented code; ✅ UI/UX Best Practices; ✅ NoSQL and SQL Databases; ✅ API Integration; ✅ Web Services Development. MySQL, SQLite, PostgreSQL, SQL Server, Firebase, Java, Kotlin, Android Studio, Android SDK, Android NDK, Device Owner, Play Store...
    vsuc_fltilesrefresh_TrophyIcon Java
    RESTful Architecture
    Android
    MySQL Programming
    Material Design
    Android SDK
    SQLite
    PHP
    Firebase Cloud Firestore
  • $36 hourly
    With expertise in Fintech, Games (incl. Gambling, Casino, Slots, Provably Fair, AAA), Video/Audio/Image processing (incl. streaming), AI (incl. OpenAI and ChatGPT), Telegram Bots and distributed architectures. Skilled in designing and developing scalable, reliable software solutions that exceed business requirements. Proficient in Go/Golang with a strong understanding of microservices, Docker, and Kubernetes. Experienced in cloud infrastructure, including GCP, AWS, and DigitalOcean. Adept at working in high-load environments and integrating external systems. Demonstrated success in leading teams and delivering projects on time. Committed to continuous learning, professional development, and collaborative problem-solving.
    vsuc_fltilesrefresh_TrophyIcon Java
    Terraform
    DigitalOcean
    Google Cloud Platform
    Amazon Web Services
    Game Development
    FinTech
    Kubernetes
    Docker
    Redis
    MongoDB
    Microservice
    PostgreSQL
    Golang
    Apache Kafka
  • $75 hourly
    Experienced iOS/Android Developer in Swift / Java who has successfully delivered several apps to the App Store (Apple and Google Play Store) on time and on budget. I am familiar with most of popular design patterns (MVC, MVVM). I have vast experience working w/ Social networking apps, Location/Map based apps, Fitness apps, Food ordering apps, Mobile games, ARKit, CoreLocation, Alamofire, as well as several other popular 3rd party SDKs. As a reliable Top-Rated Plus developer with over 8 years of experience, I’m committed to the highest industry standards in all the work I do. I also pride myself on possessing a high level of professionalism, maintaining excellent communication, meeting and exceeding client expectations, and providing solutions for problem-solving in a timely manner. I come highly recommended from all my previous clients and hope that I can continue to do so if you choose to hire me for your project. Got an idea for the next big thing? Have you been dreaming about creating your own application? If you have wireframes and need to turn them into a functional application or perhaps just a notebook with drawings of your designs, I can assist you in turning that creativity into a polished and published application for both Android and iOS platforms.
    vsuc_fltilesrefresh_TrophyIcon Java
    Shopify
    Web Development
    AR Application
    App Development
    JSON
    Chat & Messaging Software
    Push Notifications
    Android
    ARCore
    MySQL
    Swift
    Native App Development
  • $20 hourly
    I am an Android Developer with 3 years of experience. Have strong knowledge of Android SDK and Android ecosystem. Can deliver numerous functionality into your application. • Java SE, Kotlin • Android SDK • Android Architecture Components • RxJava 2 • Integrating RESTful Api • JSON, XML • OkHttp3 + Retrofit2 + Gson • Google Play Services • In-App purchases • Google Maps, GPS • ExoPlayer • AdMob Also, I am well acquainted with: OOP/OOD, SOLID, collections, multithreading, design patterns, Material Design principles, MVC, MVP, MVVM and Clean Architecture. I am always open to new interesting and challenging projects and ready to build the best quality products!
    vsuc_fltilesrefresh_TrophyIcon Java
    RESTful Architecture
    Google Maps API
    Mobile App Development
    Tablet
    Firebase
    Android Studio
    Mobile UI Design
    Kotlin
    In-App Purchases
    Android
    Android App Development
    Smartphone
    Git
    SQLite Programming
  • $25 hourly
    I am having 6+ year of hands on experience on working with both frontend, backend technologies and complete Software Development Life Cycle. I have worked with various technologies to develop web , desktop solutions and live streaming of data.
I have specialised in developing rich web applications in J2EE using hibernate and spring framework,I'm even experienced in open source software solution like Dspace (Use digitalis document) and Vufind there installation,customization etc Experience with dspace like -DSpace Domain Knowledge -Dspace Installation on cross platforms. For frontend, I have hands-on experience on 1)Bootstrap, 2)Javascript, 3)Jquery, 4)HTML5, 5)CSS3, 6)AngularJS 7)Jquery Mobile 8)Angular For backend, I have hands-on experience on 1)Java 2J2EE 3)Hibernet 4)Spring 5)Maven 6)Ant 7)Nodejs 8)Socket.io 9)Express For Source Control, I am familiar with SVN and GIT. I have experience on working with any third party API integration using XML, SOAP, JSON and JSONP. I am hardworking and passionate for my work. I always strive to surpass customers expectations, providing highest quality solutions within budget and the allocated timeline.
    vsuc_fltilesrefresh_TrophyIcon Java
    MQTT
    DICOM
    Medical Imaging
    Linux System Administration
    Socket.io
    Spring Boot
    Spring Framework
    jQuery
    Hibernate
    React
    Angular
    Node.js
  • $63 hourly
    Ever felt swamped in the vast sea of mobile app developers? It's frustrating when deliveries are late, functionalities go missing, and codes resemble intricate mazes. Trust me, you aren't the only one navigating these waters. Many collaborators have shared stories of past stumbles. But here's a ray of hope: we can steer towards a brighter horizon. With a decade under my belt and a heart full of passion, I aim to rewrite these narratives. Some Milestones: ⭐ Spearheaded development for Fitbit, which impressively raised $66M. ⭐ Had the honor of collaborating with Pure, Powerdot, and Xsat, all of which celebrated significant investment milestones. ⭐ Steered numerous projects using cutting-edge technologies, simplifying and accelerating the development trajectory. ⭐ Seamlessly merged the principles of Agile & Scrum, fostering flexibility and quick turnarounds. Let me introduce myself I'm Sergey, possibly your next Lead Android/iOS Developer. The past decade has been an exhilarating roller-coaster, packed with invaluable experiences, challenges, and a string of successful projects. I've lent my expertise to startups, and industry giants, helping them manifest their mobile app dreams. Why do they choose me? ✅ A relentless drive to craft projects that stand out and garner rave reviews. ✅ Undying support post-project because our relationship isn't just transactional. ✅ A rich toolkit encompassing Kotlin, Swift, and trailblazing frameworks like Jetpack Compose & SwiftUI. ✅ Agility in approach with a deep-rooted foundation in OOP & Functional programming styles. My Array of Specialties: 📱 Leading mobile development with Kotlin, Java, Swift 🚀 Cross-platform mobile app development using Flutter, React Native 🌐 Backend prowess with Firebase and Node.js. 💻 Architectural excellence with MVVM, MVP, MVI, and VIPER. 🔄 Transparent updates and effortless communication, ensuring you're always in the loop. In a nutshell? I value transparency, efficiency, and making a tangible difference. It's not just about crafting any mobile app, but sculpting one that resonates, scales, and surpasses the norm. Ready to embark on an extraordinary journey? Let's unite over a virtual coffee and set the wheels in motion for your next mobile marvel!
    vsuc_fltilesrefresh_TrophyIcon Java
    Machine Learning
    VPN
    Wear OS
    Smartphone
    Mobile App
    iOS
    Android
    iPad App Development
    Kotlin
    Android NDK
    Android App Development
    Android SDK
    Swift
    iOS Development
  • $50 hourly
    20 years experience in Java Full stack development using design patterns, UML, full development lifecycle. I design and implement projects from the ground up using different technologies. Very quick to learn and work with new technologies. Good at problem solving and designing a good solution for any the given project. Self-motivated and hard working. Even though I am new to UpWork, I have been working remotely for clients for the last 15 years. Technologies used: - Databases: MySQL, Postgress, H2, Derby, Oracle, Sybase, MongoDB - Backend-coding: Java, J2EE, JPA, JTA, JMS, JavaMail, JAXB, XML, SOAP, RESTful Webservices, Spring-boot, JUnit, Spring Framework, Spring MVC, JSON, Micro services - Application Servers: JBoss, Weblogic, Glassfish, Payara - Front-end: HTML, CSS, Bootstrap, Javascript, JSP, Servlets, JSF, JavaFX, Swing, Thymeleaf, JQuery - Other: MQSeries, Git, Maven, Gradle, BitBucket, JIRA, Confluence, Ant, Docker,Jenkins - Amazon EC2, Elastic Beanstalk, Amazon RDS, S3, SES,ECS
    vsuc_fltilesrefresh_TrophyIcon Java
    RESTful Architecture
    MySQL
    HTML5
    Spring Boot
    Spring Framework
    Bootstrap
    Spring Data MongoDB
    JavaScript
    Microservice
  • $35 hourly
    I specialize in developing Java web applications using Spring framework. From RESTful Web services to narrowly specialized apps for text recognition and other enterprise tasks. Both front-end and back-end. Also, I can design a relational database using any system you want. Skills: - Java - Spring Framework - Spring Boot - Angular JS - Vue.js - Vaadin Framework - JAX-RS - Hibernate - JSP - Freemarker - Thymeleaf - HTML/CSS - JavaScript - jQuery - Bootstrap - Tesseract OCR, Nicomsoft OCR - MySQL, PostgreSQL, Informix IBM SQL, SQLite, - MongoDB I have a master degree in Software Engineering from Kyiv Polytechnic Institute. As a developer, I have also taken part and won large number of hackathons.
    vsuc_fltilesrefresh_TrophyIcon Java
    Hibernate
    HTML
    Vaadin
    CSS
    JavaScript
    Spring Framework
    Jakarta Server Pages
    SQL
  • $35 hourly
    IT Specialist with over 15 years of experience in a variety of organizations . Committed to continuous learning to ensure my skills are up to date, flexible and organized, with ability to work effectively. Excellent contributor as part of a team and proven ability to work on own initiative.
    vsuc_fltilesrefresh_TrophyIcon Java
    Flutter
    Spring Boot
    Linux System Administration
    Jakarta EE
    Vaadin
    PrimeFaces
    Bash
    PostgreSQL Programming
    TypeScript
    Angular
    Ansible
    Android
    Database Architecture
    PostgreSQL
  • $75 hourly
    I am a highly experienced Java developer with 20 years of industry experience and I have been specializing in implementations using Adobe Experience Manager (AEM) for the past 8 years. I've built solutions in AEM 6.1 - 6.5 and AEMaaCS. In 2018, I was one of the winners of the Adobe Immerse 2018 Community Code Contest, as well as a presenter at the Adobe Immerse virtual conference, leading a discussion on Creating Custom ContextHub Stores and UI Modules in AEM. I have also contributed to ACS AEM Commons (the main AEM open source project) by helping to build Shared Component Properties. I also have solid experience working with various JavaScript frameworks like jQuery and VueJS and the drive to pickup new ones when necessary. I am also familiar with Less, SCSS, and CSS and the concepts of building responsive sites using Bootstrap and AEM Grid. I strive to write clear and maintainable code, and fully document my code to ensure future developers have a clear understanding of all methods and classes. Also, I will gladly provide any additional documentation or training materials requested, which will be well structured and well written. I am a strong problem solver and skilled at exploring and debugging complex problems to get software applications back on track when strange errors or edge case scenarios arise.
    vsuc_fltilesrefresh_TrophyIcon Java
    NodeJS Framework
    Adobe Experience Manager
    Vue.js
    Spring Framework
    CSS
    JavaScript
    Jakarta Server Pages
    HTML
    Java Servlet API
    jQuery
  • $50 hourly
    Full stack developer with lots of experience in Grails, Java, J2EE, Hibernate, Spring, Struts, SpringBoot. Professional and academic background on architecting and building Multi-Tenant Software as a Service. Over the last 11 years, I have worked on variety of projects including web sites/Web applications, Enterprise applications, SAAS and Cloud, Microservices, Mobile Applications My skill sets include: * Languages: Java, Groovy, SQL, C, Ruby, CSS, HTML, JavaScript, PHP * Frameworks Grails, SpringBoot, Bootstrap, Ruby on Rails, Hibernate, Hadoop, Spring, YII, Laravel * Libraries/APIs Java Collections, jQuery UI, jQuery, JAX-RS, Google Gson, JavaMail, Amazon API, Asterisk-Java, Selenium, HTMLUnit, Jsoup * Databases: - Relational: Mysql, PostgreSQL, Oracle, DB2; - NoSQL: Redis, Memcached, SimpleDB; In my case, I enjoy working with small businesses and individual decision makers to provide architectural and custom business solutions that help my clients resolve mission-critical problems, grow their business, and improve their revenue stream and profitability.
    vsuc_fltilesrefresh_TrophyIcon Java
    Twitter/X Bootstrap
    Asterisk
    J2EE
    JDBC
    Grails
    jQuery
    Hibernate
    Apache Groovy
    Spring Framework
  • $20 hourly
    AI Developer, ✅ Certified Fullstack Software Developer ✅ Worked with Startups to Fortune 500 companies. Full Stack Developer, Architecture with 9+ years of experience in AI application, Blockchain Apps, Software development, Cloud application development, custom web development, LMS development, SAAS development, POS, and ERP development. In the past decade, I got the opportunity to work with some of the most sophisticated (read complex) web and mobile apps. In this period, I had an opportunity to work with the world's best brands, so you can trust us for high-quality work and stunning turn-around time. I went on to create some great products which are changing lives (quite literally). These applications belonged to a variety of domains business domains such as AI chatbots, LLM apps development (API GPT 3.5/4, Meta LLama, LangChain, vector database Pinecone & others), LLama, model fine-tuning. 𝐂𝐡𝐚𝐭𝐛𝐨𝐭 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: I can build and integrate ChatGPT with different apps and create custom Chatbots for various platforms. - Generative AI: GPT-3, GPT-4, ChatGPT, OpenAI; - Prompt Engineering, Botpress, Flowise, Langchain; - API development, Chatbot integrations. 𝐀𝐏𝐈 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Backend development is very close to proper architecture, so in my experience, it's best to start with requirements and architecture development, after which I can help you with API development for anything from a simple backend to a highly loaded distributed cloud infrastructure. - Node.js, Nest.js and Golang; - MSSQL, MySQL, SQL Server, MongoDB, and PostgreSQL; - Docker, - Amazon Web Services (AWS), Google Cloud Platform, DigitalOcean and others. ✅ E-commerce |Social Networks | Listing Platforms | CRM | Travel | Manufacturing ✔ Mobile App Development: Android | iOS | Flutter| Hybrid Mobile App Development ✔ Mobile App Development Languages: - iOS - Objective C, Swift - Android - Java, Kotlin - Flutter - React Native ✔ Elearning Tech: Articulate Storyline, Captivate, Flash, Adapt, Html5, Camtasia and Custom LMS 🏆 Expertise and exhaustive skills in the following technologies: - ✔ Full Stack: MEAN | MERN ✔ PHP Frameworks (laravel 3.x, 4.x & 5.x, codeigniter, yii, cakephp and zend). ✔ PHP CMS (WordPress, Shopify). ✔ javascript (jquery, angular js, node js, react js, next js). ✔ SQL and NoSQL (MySQL, MongoDB, PostgreSQL and Oracle). ✔ html5, css3, sass/scss/less/stylus and haml. ✔ Foundation framework (3.0, 4.0 and 5.0), Twitter bootstrap (2.x and 3.x), profound, pure CSS, response.gs, and Gumby. ✔ extensions (Firefox extensions and bookmarklet developments). ✔ APIs (Twilio, New Relic, Facebook ads, Google Maps, Mandrill, LinkedIn, Mail Chimp, Google Maps, LinkedIn, sailthru, jetpay, eBay and custom restful API development). ✔ other (amazon services [ec2, CloudFront, s3 ]) ✔ Payment Gateway integration for Normal or Recurring/Subscription Payments: Worldpay, Paypa, Stripe - 3D secure SCA 2-way authentication according to the new guidelines in the custom framework on any CMS. ✔ Other: Git, Jira, BitBucket, Apache, SEO, JavaScript, JQuery, HTML, XML, CSS Successful experience with Agile (Scrum, Kanban) methodologies; - Design and realization of high-load projects; - Integration between e-commerce and ERP systems; - Well-commented code (PHPDoc) - meet PHP Coding Standards (psr-2) Specialize in: - Text-to-image generation Conversational AI 🔮 - Machine learning modeling and data analytics 📊 - Python, PyTorch, TensorFlow development - Deep learning and ML modelling - Mobile Development for iOS / Android / Cross-platform - Desktop Development for Windows - VR & AR Development using Unreal Engine / Unity 3D - Web3, Blockchain Development - Technical Oversight / Solution Architecture If you think you need someone who: *Would understand your product *Has exceptional qualifications for delivery capacity *Can communicate well throughout the development lifecycle *Make your product his priority You seem to be in the right place :) Every friend you have ever made would have been a stranger if you didn't say "hi!" I look forward to having a great, successful and rewarding relationship with you. Let's talk :)
    vsuc_fltilesrefresh_TrophyIcon Java
    Blockchain Development
    Angular
    React
    Mobile App Development
    Machine Learning Model
    Artificial Intelligence
    LangChain
    Bot Development
    Swift
    API Development
    ASP.NET Core
    Kotlin
    Laravel
    SQL
    .NET Framework
  • $46 hourly
    I am a tech enthusiast and Software Engineer with +7 years of experience in several fields. - Front-end experience: Flutter, Angular, HTML, CSS, Android - Back-end experience: Firebase, Java, Node.js, C#, Ruby on Rails I am the co-founder of a Flutter Agency in which we provide custom software development and staff augmentation services, having developed and deployed 10+ apps/webs. I developed an award-winning social project called "Berrinche" whose main purpose is to help parents and therapists of those with ASD to discover the causes of disruptive conduct and how to treat them.
    vsuc_fltilesrefresh_TrophyIcon Java
    pandas
    Microsoft Power BI
    Python
    Dart
    In-App Search
    Node.js
    Ruby on Rails
    CSS
    HTML
    C#
    Android
    Angular
    JavaScript
    Flutter
  • $15 hourly
    Computer science student with practical experience using Android Studio through internship. Enjoys developing Android apps and designing them. Willing to try the hardest and learn new skills to achieve the desired work.
    vsuc_fltilesrefresh_TrophyIcon Java
    Golang
    Mobile App Development
    Android App Development
    MySQL
    PostgreSQL
    User Authentication
    Android
    Android Studio
    Firebase
    Kotlin
    SQLite
  • $20 hourly
    Hi there! My name is Timur. I have over two years of professional frontend and backend development experience. My skills: ✔️ Proficient knowledge of Golang and its ecosystem ✔️ Previously worked with Java and Spring Boot for 2 years ✔️ Extensive experience with Angular ✔️ Long history of fixing bugs ✔️ Development of your website's architecture ✔️ Experience working with AWS and Firebase ✔️ Excellent English You can check out my portfolio in the portfolio section. Want to discuss your future or ongoing projects? Feel free to contact me. I'm available any time, six days a week.
    vsuc_fltilesrefresh_TrophyIcon Java
    RESTful API
    Spring Boot
    Kotlin
    Angular
    React
  • $25 hourly
    Good day, If you check my profile you want to want to get a great Android mobile app and I can help you with it. I am a skilled Android developer with more than 5 years of experience. My stack is Java (5+ years) and Kotlin (3+ years). During all those years I finished more than 20 apps with different functionality for different purposes. It includes fixes and new features implementation to existing apps. The most common features which I implemented into apps are Geolocation, Social network functions, Special custom views, Audio reporting, Hardware development, and many others. Please check the list of the tools I have used for my previous Android development: - CustomView; - Retrofit; - Picasso; - SQLite, Realm; - DataBinding; - DependencyInjection; - ButterKnife; - EventBus; - MediaPlayer, SoundPool, MediaRecorder; - Google support libraries (design, custom tabs, card view, etc.); - Google services (firebase, maps, places, location, etc.); - MapboxSdk, FacebookSdk; - MuPDF Don't hesitate to contact me, I will check all your requirements and prepare an estimation for free.
    vsuc_fltilesrefresh_TrophyIcon Java
    Google Maps API
    OAuth
    Android SDK
    Mobile App Development
    Android App Development
    RESTful Architecture
    Android
  • $50 hourly
    ** I am what I am because of what we all are. ** I am a self-motivated, hard-working, and open-source contributor. My GitHub handle is *amsurana* Mobile experience [since 2009] * Worked on Qualcomm, Mediatek, Amlogic, Rockchip based devices. * Porting and Writing Device Drivers * Customizing Android Kernel * Android Automotive OS Expert - Projects and Consulting. Ported Automotive OS to RPI. * Android Firmware development for all kind of Devices [PCBA, Phones, Tablet, TV, Accessories] * Android SDK/NDK * Android Wearable * Custom ROM - I have deep experience in customizing Android and modifying the entire OS experience as per the requirements. Some of the customizations I have done - changing boot animations, modifying shutdown screen, removing bloatware, developing system-level apps, making a tablet a Kiosk (without permissions), Bluetooth stack modification, Carrier config updates, and many more. * Secure OS - Make your Android ultra-secure. * OTA for A/B Seamless or Non-AB devices * Secure Android OS using AVB Tool * MDM, EMM, Mobile Device Management - If you plan to use MDM or develop your MDM, do reach out to me. I have experience in Airwatch, SOTI, ScaleFusion, Gears42, and FieldX. Special Skills: Z-wave, Zigbee, IoT, Amazon Alexa, Google Home Assistant, Smarthome, IFTTT Keywords - Android, Web, Social Media Integration, Java, J2EE, Bluetooth, BlueZ, DBus, AOSP, Custom ROM, Docker, Play Framework, Linux, AWS, EC2, MongoDB, Eclipse, Cyanogen mod, LineageOS Android TV, Android OS, Custom ROM, Tizen, LinegaeOS, RaspberryPi, OrangePi, Khadas VIM, HiKey, Amlogic, Rockchip, Airwatch, SOTI, MDM, EMM, Pentest, Penetration Testing, Qualcomm, Mediatek
    vsuc_fltilesrefresh_TrophyIcon Java
    Raspberry Pi
    AOSP
    Mobile Device Management
    Embedded System
    Firmware
    Internet of Things
    Firmware Programming
    Android SDK
    Android NDK
    Android App Development
    Mobile App Development
    Android
    Kotlin
  • $28 hourly
    🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 PLUS 𝗠𝗢𝗕𝗜𝗟𝗘 𝗔𝗣𝗣 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗘𝗥 🏆 --------------------------------------------------------------- Expertise - Flutter ! Native ! Kotlin ! Swift ! Java ! Dart ! I have been a professional mobile application developer in Android, iOS, and Flutter for cross-platform for 11+ years, and I am very familiar with mobile application development. During my 11+ years as a mobile application developer, I created many live apps on google and the apple app store. I am Full time freelancer. I always strive to be the best individual that I can be and take every challenging opportunity as a chance to learn and grow. Couple of reasons why hire me: * Unlike other great developers, I know how important it is to keep an open communication channel, updated you for a single update on time, finish products on or before time. * I've started developing mobile applications 10 years ago. By now, I was exposed to different areas of science (not only computer science), so when you need not only a coder, but also someone that thinks logically/analytically, I'm your guy. * Even though my rate may seem high, I can assure you that I'm efficient and spending time purely on planning and development. I'm never charging for anything not directly connected with project.
    vsuc_fltilesrefresh_TrophyIcon Java
    Mobile App
    Android
    iOS Development
    React Native
    Objective-C
    Android App Development
    Swift
    Android Studio
    Dart
    Kotlin
    Flutter
    Mobile App Development
    Hybrid App Development
  • $20 hourly
    I have 14 years of software development experience overall. • Motivated and reliable Android Developer with an excellent work ethic and programming language knowledge base • Able to build applications from concept to final product to the client's or project's specifications • Experienced in object-oriented programming; development, testing, and debugging code; design UI • Able to work well independently or as part of a professional development team in order to meet and achieve project goals I have experience with: - Java - Kotlin - Android SDK - Android architecture components - Google Play Services - Firebase, Parse, Backendless, Cloudinary SDKs - Retrofit - RxJava 2 - Dagger 2 - MVP, MVC, MVVM - Testing - UI design with Material Design - Social media integration (Twitter, Facebook, Google plus, VK) - Git
    vsuc_fltilesrefresh_TrophyIcon Java
    Tablet
    Smartphone
    Android
    Dagger 2
    Android App Development
    Mobile App Development
    JSON
    Kotlin
    Android SDK
    Firebase
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How to Hire Top Java Developers

What is a Java developer?

Java developers write universally compatible and scalable applications using Java code and tools. They can build and maintain high-traffic server-side apps, develop mobile apps, and handle security, software debugging, quality control, testing, and much more.

How do you hire a Java developer?

You can source Java developer talent on Upwork by following these three steps:

  • Write a project description. You’ll want to determine your scope of work and the skills and requirements you are looking for in a Java developer.
  • Post it on Upwork. Once you’ve written a project description, post it to Upwork. Simply follow the prompts to help you input the information you collected to scope out your project.
  • Shortlist and interview Java developers. Once the proposals start coming in, create a shortlist of the professionals you want to interview. 

Of these three steps, your project description is where you will determine your scope of work and the specific type of Java developer you need to complete your project.  

How much does it cost to hire a Java developer?

Rates can vary due to many factors, including expertise and experience, location, and market conditions. Learn about the cost to hire a Java developer.

How do you write a Java developer job post?

Your job post is your chance to describe your project scope, budget, and talent needs. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample Java developers job post titles:

  • Java developer needed for poverty action application
  • Seeking Java developer for real-time music jamming app
  • Looking for a Java developer to help with a Shopify website

Project description

An effective Java developers job post should include: 

  • Scope of work: From Android apps to big data analytics, list all the deliverables you’ll need. 
  • Project length: Your job post should indicate whether this is a smaller or larger project. 
  • Background: If you prefer experience with certain industries, software, or coding languages, mention this here. 
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Java developer job responsibilities

Here are some examples of Java developers job responsibilities:

  • Develop and implement high-volume, low-latency applications to meet organizational goals
  • Ensure implementation of best security practices for users and networks
  • Define application objectives and functionality to deliver high availability and performance
  • Manage programming projects to design, test, and debug software

Java developer job requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in Java developers. Here are some examples:

  • Experience with server-side technologies such as Apache, JBoss, Geronimo, GlassFish, etc.
  • Familiarity with Android apps, enterprise software, scientific computing, and/or data analytics
  • Background in database management, software development, and computer architecture
  • Profound insight of Java and relational databases, SQL, and ORM technologies
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