Senior Java Developers & Programmers

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Post your Java projects on Upwork and hire expert software engineers and senior Java developers. They can create mobile applications for Android and iOS, redevelop Android widgets, modify and add new Java scripts to your custom Java software, or develop GUI applications with the Swing GUI widget toolkit. The java developers on Upwork are experienced in Java persistence frameworks (like Hibernate), web development, security or database frameworks and Java project lifecycle management tools (like Maven). They can also check, fix or add new Java classes into your Java code, or manage your software debugging, quality control software development or testing tool programming.

Java is a class-based, object-oriented computer programming language that is ideal for cross-platform application development. It comes with a library of commonly used classes and utility functions, called the Java API. On Upwork, the world’s largest online workplace, companies hire experienced Java architects and software engineers to develop all kinds of cross-platform applications, from torrent clients and media players, to helpdesk tools and mobile apps.

Browse Java job posts for project examples or post your job on Upwork for free!

Java Job Cost Overview

Typical total cost of Upwork Java projects based on completed and fixed-price jobs.

Upwork Java Jobs Completed Quarterly

On average, 623 Java projects are completed every quarter on Upwork.

623

Time to Complete Upwork Java Jobs

Time needed to complete a Java project on Upwork.

Average Java Freelancer Feedback Score

Java Upwork freelancers typically receive a client rating of 4.70.

4.70
Last updated: May 1, 2015
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  1. Victor Vlasenko

    Victor Vlasenko Agency Contractor

    Founder and Senior Developer at SysGears

    Ukraine - Last active: 1 day ago - Tests: 4

    A senior developer with over 12 years of experience, focused on creating complex Java/Scala solutions. Especially efficient at software optimization and implementation of high performance computing systems. Fully dedicated to product quality, beauty of architecture and performance of the code. Technical Proficiencies: - Languages: Java, Scala, Groovy, JavaScript - Web Frameworks: Grails, Play 2, AngularJS - Frameworks: Akka, Spray, ZooKeeper - Databases: MongoDB, MySQL, H2

    Associated with: SysGears

    $30.00 /hr
    1,247 hours
    4.92
  2. Faisal Irfan

    Faisal Irfan Agency Contractor

    Senior Software Engineer

    Pakistan - Last active: 3 days ago - Tests: 6 - Portfolio: 14

    Working as a freelancer was best decision that I have ever made and as a result, I have had the opportunity to work on many different aspects of projects, from strategy, managing, and planning, to the complete production of these. I have also become more interested in the commercial aspect of projects, becoming more aware of the importance of incorporating responsible business decisions to successfully achieving business objectives. I put my pants on just like the rest of you—one leg at a time. Except, once my pants are on, I design and develop great websites. What? you dont believe me :) okay go ahead Check my work » By day, I am a vibrant web designer & Web developer. By night: I am a part of a band of highly–trained, elite special operations web mercenaries on the lam from the law. I delight in creating beautiful, advanced web sites. I love what I do and so will you. Interested? Drop me a line at faisal.mnettech@gmail.com. I work with a burning passion for creating great websites. Yes I didn’t invent the internet but I believe I make the web a better place. I love it, and you will too. I Live in Islamabad, Pakistan. I use to work as an Interaction designer for DirectI, where I was responsible to translate ideas into prototypes and mock-ups to be built by our dev teams. My day-to-day responsibilities include creating user workflows, designing mock-ups for A/B testing and building prototypes for new features. Before this I have worked as a Front-End Developer for RealTSP , where I designed customer and client-facing screens for a successful e-commerce platform, and also in the UI team at digital-telepathy and as a web designer at Trademark 5150. All above jobs were work from home you can call it my freelance work. Back then it wasn’t that bad. After 5150 I switched to Makabu and there I was introduced with java, my true love (now I am married to it). Java kinda flow in my veins now. Since then I have been working with worked on many large scale projects like SanMar. I worked there for almost two years and I was responsible for web application development using j2ee technologies, back-end development which involves working on java, j2ee patterns, front-end development which involves playing with tool stuff like ajax, css, javascript, xml, servlets, jsp and struts framework, deployment of web application into servers running apache tomcat and ibm web sphere, takes care of projects which i have deployed to servers of info. and other valuable clients. While working with SanMar, I was contacted by some of my clients and they insisted to help them with some projects and I end up founding Mnet-Technologies where now I am working with a small team of some awesome developers, like John Doe :) , and just got strategic partnership with Aitek inc., MegaZone inc., Golden Services LLC and Golden Services of Utah. At Mnet-Technologies we are also planning to introduce an opensource CRM which will be released soon. I enjoy working on Interface Design, especially xHTML and CSS. I also enjoy programming with JavaScript, PhP, Java and .Net. oh did I mention Mobile Apps design and development (Iphone,Android and BlackBerry). Yes I also do video editing and Web Designing. What My Clients Say! Our development & CMS were critical & FI. delivered! his work ethic, quality, honesty & intelligence are a true find. Dave Lipuma / Golden Services Faisal Irfan totally captured what we’re all about. And he did it with style. We love our new site! John Ritchie / Pastor / Edgepoint Church

    Associated with: Virt-Stack Inc

    $30.00 /hr
    454 hours
    4.95
  3. Alexey R

    Alexey R Agency Contractor

    Atlassian Expert, 12 years experience

    Poland - Last active: 8 days ago - Tests: 3 - Portfolio: 8

    Senior / leading level of projects management and tasks delivery. Deep understanding not only Atlassian products, but also how they can be used in different situation / businesses. Top speaker at Atlassian conferences / meetups, participant of Atlassian contests. Consulting from software development processes optimization to Jira add-on development. __________________________________________________ 1. Atlassian products support: Jira, Confluence, Bamboo, Crowd, FishEye, Crucible 2. Add-ons development 3. Jira upgrades and migrations 4. Integration with outer systems 5. Staff Consultancy & training

    Associated with: Atlassian Experts, Java devs

    $43.30 /hr
    2,221 hours
    4.63
  4. Francis raymund D.

    Francis raymund D. Agency Contractor

    Wordpress . ASP .NET . C# . MSSQL . Magento . Bootstrap . Angular JS

    Philippines - Last active: 3 days ago - Tests: 5 - Portfolio: 3

    7 years experience working on over 100 web applications that serve over 2,000,000 web users annually and bring in over 1,000,000 in annual sales. Motorola, General Motors, St. Paul University, Wesleyan University, Oklahoma city and Sands Trustee are some of the national & international brands I have worked with. Contact me today so we can discuss your project. Technologies I have worked with include: Magento, WordPress, WP, LAMP (Linux Apache PHP MySQL), Laravel, Code Igniter, .NET ASP, C#, cake php, twitter bootstrap, jQuery, Angular js, eCommerce solutions, stripe integration, paypal integration, API integration, i18n Internationalization, shell scripting, web automation

    Associated with: 247 Labs, iDEV SOLUTIONS

    $38.01 /hr
    2,146 hours
    4.99
  5. Pankti P.

    Pankti P. Agency Contractor

    One Stop Solution provider(Web,Mobile App)

    India - Last active: 14 days ago - Tests: 2 - Portfolio: 1

    Being a highly mission focused and driven individual, I thrive when there are well planned out tasks to undertake. I will loyally devote my time to create the most efficient and presentable solution to clients, and will not stop until I have achieved my objective. I have used excellent communication skills in tandem with an extensive technical knowledge to help resolve problems for clients while streamlining business procedures and applying new standards. I also believe mutually beneficial collaboration with confidence from both sides. Arriving at work ahead of schedule, well prepared and presented is what I pride myself in.I have learned that being organised will allow for the best productivity. With a strong background and awareness I can oversee the necessary actions and approach my work in the most appropriate fashion to deliver the best possible product.

    Associated with: DHP Infotech

    $15.00 /hr
    189 hours
    5.00
  6. Alexander M.

    Alexander M. Agency Contractor

    Software Architect / Full-stack Web Developer NodeJS/Drupal/AngularJS

    Russia - Last active: 11 hours ago - Tests: 4 - Portfolio: 8

    I'm a Lead Developer / Software Architect with wide range of knowledge in web development process. My primary skills are Javascript, NodeJS, PHP, Drupal, Yii, MySQL, MongoDB, OrientDB, AngularJS, jQuery, Ajax and CSS. During last 8 years I'm constantly evolving and learning modern technologies and methodologies of the web apps development applying them to my projects. My strength in development and architecture: - excellent knowledge of OOP - using Software Design Patterns for app development - tendency for loosely coupled architecture with a modular structure - open to innovations - reasonable choice of application components My main principles: - designing architecture with a look at the future development of the application - building correct process of app development - right tool for the right job I'm very interested in ongoing jobs and partnerships, so it is very important for me to make my clients happy. Feel free to contact me and I would be glad to discuss your project.

    Associated with: BurningButtons-L

    $33.33 /hr
    2,619 hours
    5.00
  7. Rayed Bajwa

    Rayed Bajwa Agency Contractor

    Software Engineer (We.DeVz)

    Pakistan - Last active: 1 day ago - Tests: 2 - Portfolio: 8

    Software Engineer and entrepreneur, with successful track record of developing projects including C#, PHP, WordPress, Codeigniter, Andriod, Java, Jquery, CSS, Javascripts, Bootstrap & other frameworks. My technical expertize, combined with a commercial acumen and competency to collaboratively work in a team, have been creating significant commercial value for my clients. These skills and talents will be a great asset for any organization looking for young talent in the area of software engineering. What Makes me Better than other Contractors? - 100% feedback score from all my clients - 100% refund if customer is not satisfied - Fast turn back time - Best Quality - I keep posting my employer each n every day through email or Skype. - I provide my personal mobile number of ANYTIME contact. - I do most of the work before time and spend rest of the time adding new features and patches that employer may want later. - I am a software engineer, I manage all projects as per international standards. My Skill Set: 1) PHP, HTML 5, CSS, SCSS, ASP.NET, MVC Codeigniter. 2) CMS: Wordpress, Magento, Joomla. 3) Desktop Applications: VS, C#, Java, APIs, SQL 4) Andriod Phone Development: UI Design + Back-End Coding 5) Unity 3D Back-End Coding

    Associated with: WeDeVz

    $16.67 /hr
    504 hours
    5.00
  8. Saurabh S.

    Saurabh S. Agency Contractor

    Web components / Web / Mobile Developer

    India - Last active: 11 hours ago - Tests: 7 - Portfolio: 9

    Specialise in design as well technical implementation of web and mobile based solutions. Work heavily on Javascript, Java along with Python. Keen to work on Web components driven jobs(Love Polymer, React + Flux Architecture ). Love working on newer HTML5 features. I am a 11+years experienced developer. I have worked for more than 3-4 international solution providers before starting my freelancing career. Right now I am looking for a new Contract after doing one for a single long term contract. My profile can be viewed at in.linkedin.com/in/saurshaz A few bit about the work culture and commandments i believe in are below - # Documented API design using Swagger and automated validation tools. # High focus of Test Driven Development (TDD). More importance on testing than implementation itself (E2E as well as Unit testing) # Heavily maintainable codebase/solution with clean and commented code. We do not compromise on quality at any stage. # Also rely a lot on continuous integration tools for being in control of the situation at all points pre-post implementation of the project # Work with the client in an agile methodology, Deliver a stage build to the client on heroku /AWS at suitable times and keep the client engaged for inputs along the way with communication channels(Skype/hangouts etc.) # Follow a lean but powerful tech stack(For Node - MEAN or Mean minus A plus X MVVM f/w or React based isomorphic code, For Java / Python - Flask/ mysql/mongo, For- thin server , richer clients). Open to adapting more and more on this and learning along the way as different requirements are faced. # Defect management in simplest manner # Initially scope of work via easiest and quickest way of documentation) Modules based UI development like done in Polymer/React along with REST APIs are the areas that I'm currently exploring. The github/bitbucket repo - https://github.com/saurshaz, https://github.com/ProKriya, https://gitlab.com/saurshaz and https://bitbucket.com/saurshaz. Most of the work though is in private repositories on bitbucket. Some of the recently worked upon applications - * A public facing alumni based job portal -- letscatchup.net. Involves a job aggregators switch-ability with ease using a written-from-scratch framework * The current project which is a platform built on isomorphism of JS on browser and node world * Polymer based UI talking to REST calls, Documented with Swagger * Flux architecture e-store with APIs interaction http://about.me/saurshaz ~Saurabh

    Associated with: ProKriya

    $33.33 /hr
    2,850 hours
    5.00
  9. Sugiarto U.

    Sugiarto U. Agency Contractor

    Senior Ruby on Rails Developer and Manager

    Indonesia - Last active: 11 hours ago - Tests: 7 - Portfolio: 10

    Hello All, I am a senior ruby on rails developer. I like to learn and always learn. I want help you to solve your problems. Here what I can do for you: - Create app from scratch to enable your businesses - Develop new features for your existing apps - Fix buggy apps - Refactoring your apps source code. - Optimize your apps. - Create testing for your apps - Or maybe just question/answer for your problem. We can achieve points above using many technologies. - Database: mysql, redis, etc? - TDD/BDD development: cucumber, hudson,etc? - Background process: delayed_job, resque, etc? - Or Language it self: ruby,java,javascript..? - UI: html,js,ajax,jquery,prototype,css..? - Create API: REST,json? - Consume API: tucow, rackspace - Deployment: chef recipes Engineyard? - Versioning: git,svn? - hah.. there are ton technologies that we can use to solve problem, so the best way just communication :p. NEED MORE DEVELOPER/DESIGNER? I know I also limited by time, so If you need to solve problem, and need more developers/designers I also can provide them for you and I can manage them for you.

    Groups: Engine Yard Ruby on Rails Professionals Network

    Associated with: 27digits

    $44.44 /hr
    5,539 hours
    4.70
  10. Leonid B.

    Leonid B. Agency Contractor

    Expert J2EE, Spring, Hibernate, Web Developer

    Moldova - Last active: 3 days ago - Tests: 1

    I have more than 8 years of experience working as a senior Java developer. I have strong experience with such technologies as J2EE, Spring Framework, JPA/Hibernate, Web-services, and MySQL, PostgreSQL and Oracle databases, as well as NoSQL stores. I will be glad to assist you with the Java related project where I can apply my skills and knowledge to achieve the best results.

    Associated with: SOFTREACTOR LLC

    $18.89 /hr
    1,201 hours
    5.00