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. Eric S.

    Eric S.

    Senior Web & Mobile Expert

    China - Last active: 1 day ago - Tests: 32 - Portfolio: 22

    Web Master with 8 years of experience in designing, developing, improving and maintenance. For the last 2 years, I worked on 3 projects as project manager & developer and led them to success. Always trying to complete project perfectly by suggesting innovative solutions. *** Areas of Expertise *** - Advanced programming and designing skills - Project Management - Risk Management and solving skills - Teamwork - Website Optimization, SEO *** Technical Skills *** PHP, Ruby, NodeJS, HTML5, CSS2/3, Javascript, Java, MySQL, Oracle, PostgreSQL, MongoDB, Wordpress, Magento, Ruby on Rails, Zend, Joomla, Drupal, YII, Laravel, JQuery, JQuery UI, VelocityJS, AngularJS, Greensock, ScrollMagic Bootstrap, SCSS, LESS, Responsive Design, Parallex Design, Redmine, GetFlow, Pivotal, Git, SVN, Github, General skill in Amazon Web Services, CPanel Management, Mojohost Management

    Groups: BigCommerce, BoonEx...

    $50.00 /hr
    10,948 hours
    4.95
  2. Alvaro Gomez

    Alvaro Gomez

    Computer vision, Machine learning and pattern recognition expert

    Peru - Last active: 12 days ago - Tests: 5

    M. Sc. in Computer science with a mention in image processing and pattern recognition. Im a Computer vision specialist with over 4 years of hands on experience on a variety of computer vision applications. I have strong background in maths and computer science, research skills in computer vision, senior programmer in C/C++ and Matlab. On the past years i focused on the development of computer vision solutions for real world problems involving extensive research and ground breaking solutions. I have over 3 years experience working with OpenCV and porting image processing solutions to mobile platforms for real time processing. Im very interested in the research and development of a new challenge computer vision tasks including pattern recognition, machine learning and image analysis. I am seeking opportunities to develop and maintain complete computer vision applications, whatever standalone or back-ends for smart websites or light weight solutions for mobile applications.

    Groups: Upwork Verified Mobile Developers

    $33.33 /hr
    3,651 hours
    4.96
  3. Soorya D.

    Soorya D.

    Selenium/WebDriver Developer l Web/Mobile Automation | Appium |

    India - Last active: 1 month ago - Tests: 6 - Portfolio: 18

    Last 9+ years, I have been testing and automating applications for Fortune 500 companies. Having 7+ years of work experience in test automation .In that 6+ years on Automating web/mobile app tests using Selenium 2.0(WebDriver) / Selenium 1.0 (RC).Good experience on Mobile automation and integrating tests with CI tools like Jenkins or cloud services like Sauce-labs, BrowserStack. Automation Frameworks development using combination of : - Selenium/WebDriver, Selenium Grid - Appium, Protractor (AngularJS) - Data-driven Selenium tests with external Excel, XML and CSV-based data. - Java / Ruby / Python / PHP - TestNG - ReportNG - JUnit - XMLUnit - Page Object - JBehave - FitNesse - Cucumber - Robot, AutoIt & Sikuli - Jenkins (including integrating with SVN/ Perforce/GitHub/ Saucelabs.) - Maven/ANT - Flex automation agents like Flexmonkium, FlexPilot, SeleniumFlex API * RestFul Web service testing using SoapUI * Performance testing Using JMeter/ SoapUI * Automating websites that involves Map(like Google Maps) interactions I have strong experience in testing various types of software ranging from desktop applications to web applications. Types of testing that I have done include: =============================== - Black Box and White Box Testing - Manual and Automation testing - Smoke testing - Functionality testing - Integration testing - Cosmetic error testing - GUI Testing - Cross browser compatibility testing - Regression testing - User Acceptance Testing - Mobile app testing - Games testing - Performance testing "Passion for Test Automation", "Good Communication", "Think from a customer perspective", "Good error guessing skills", "Analytical and logical thinking", A strong desire for quality" and "An attention to detail" are the qualities of a best Software Test Engineer. So if you are searching for a person with above qualities and abilities.I can ensure you that I best fit in to your mission.

    $35.00 /hr
    603 hours
    5.00
  4. Torsten Weigelt

    Torsten Weigelt

    Python or QA work

    Ireland - Last active: 1 day ago - Tests: 23 - Portfolio: 5

    The following (not conclusive) list summarizes the skill and experience: o Able to notice and pursue odd details o Hands-on knowledge of QA methods, tools, and terminologies o Willingness to get one's hands dirty, to experiment, to try something to see what happens o Extremely passionate about high quality, clean software o Ability to research, grasp and apply new concepts o Methodical and systematic testing approach o Skeptical, especially about assumptions, and want to see concrete evidence o Solid understanding of quality systems and software test cycle processes o Ability to run tests, analyze reports, and recommend corrections as needed in order to ensure high quality standards Specialties: o Programming expertise: C/C++, Java, nesC, PHP 4/5 o Web development: W3C conform: (x)HTML, CSS o Union negotiation and team leading

    $111.11 /hr
    105 hours
    4.87
  5. Stephen Brown

    Stephen Brown

    B. Sc. (Honours), Veteran Web Developer in C#.NET

    Canada - Last active: 17 days ago - Tests: 2

    I have had a love for programming since a very young age. I have now been programming seriously for 12 years. I graduated Memorial University of Newfoundland in 2007 with a B. Sc.(Honours) in Computer Science. I have worked a lot recently in web development in C# but also have experience with databases and scripting. Here are a few of my skills Web Programming - C#.NET, VB.NET, WET 4, HTML, CSS, JavaScript, TFS Programming - Java, C#, VB, Python Scripting - Python

    $44.44 /hr
    54 hours
    5.00
  6. Ilija S.

    Ilija S.

    data scientist

    Serbia - Last active: 12 days ago - Tests: 2

    Learn through data analysis, would be the tag line for me. I am a data scientist with business intelligence and text analysis background. I am also a JAVA/php/javascript developer, like databases, have a PhD (if important). Strong incentive to build systems that analyse and learn from data. I've done this for the last 8 years in academia and industry, and will try to do it for a long time (still only 30).

    $38.89 /hr
    299 hours
    4.99
  7. Fernando Barrocal

    Fernando Barrocal

    Software Architect, Project Manager and Web Systems Senior Developer

    Brazil - Last active: 5 hours ago - Tests: 5 - Portfolio: 5

    I am looking for opportunities to work on areas of my expertise, which includes building internet systems since the planning to its deployment, going through server installation, researching the best technologies the system development, webpages layout and design , focusing on the client's needs. I have a strong background working with servers maintenance since 1998, in several areas, like network analisys and security, email , file, network and application servers as well web infrastructure like LAMP. My experience includes maintence and security of networks with firewalls, anti-virus and anti-spyware solutions. As Project Manager I am able to create web systems in several languages using different frameworks like Struts in Java, Zend, Zend 2 and CakePHP for PHP and .NET C#. I have a large experience in MVC Architectural Patterns, which, in synergy with my experience working on distributed projects, gives me experience needed to work along other developers and designers as needed. I am a highly organized developer and look forward to have a system tracking tasks and jobs that are needed to be done for long term works. Among all high level frameworks I use I have experience working with several other technologies like SOAP, REST, Payment Gateways, Boostraps (twitter, node) Feel free to contact me with any question.

    $35.00 /hr
    3,096 hours
    4.89
  8. Dmitry G.

    Dmitry G.

    Expert Android developer | Project Manager

    Belarus - Last active: 3 days ago - Tests: 9 - Portfolio: 6

    Android, iOS, Unity3D, Oculus Rift, Google Glass, Android Wear apps developer. - oDesk All-Star Freelancer Club member! - oDesk Verified Mobile Developers Club member! (oDesk has recognized me as one of their top Mobile Developers. See the badge on the right of my profile for more information.) - iOS applications - Android applications - Cross-platform applications (Unity 3D) - Oculus Rift apps development - Google Glass applications - Android Wear (Android Watches) development - iBeacons development I graduated from Radiophysics & Computer Technologies department of Belorussian State University and am a certified Java SE/EE and Android developer. By now I have delivered over 30 successful mobile solutions to such companies as Novartis, Takeda, Alvesco (multinational pharmaceutical corporations), OLVG, LRF and others. Being a part of Codelegs team, I developed Google Re:Imagined and Block’em applications. Versatile development experience, communication skills and result-oriented approach helped me grow into an effective project manager. Professional football player in the past, I am still very much fond of sports. Besides that, my non-working time is usually devoted to traveling and books. All-Star Freelancer Club member since January 2014. To communicate with my clients I mainly use email and Skype, and I'm always available for a constructive discussion with you. Thanks for reading this overview! Best Regards, Dmitry.

    Groups: Upwork Verified Mobile Developers

    $48.50 /hr
    2,986 hours
    5.00
  9. Jonathan C.

    Jonathan C.

    Consultant

    United Kingdom - Last active: 4 days ago - Tests: 1

    I have a UK university PhD, in Artificial Intelligence, and the business management skills to match, together With 15 years of Delphi, C++, Java, SQL, and Object-oriented analysis and design experience. I specialise in development including protocol specification, thread management, distributed communication and database transaction management. I have retro-fitted software in tasks ranging from installing improved modules to sophisticated Artificial Intelligence sub-systems. I can provide the often essential empathy with the contract holders, and the pragmatics to satisfy the demands of management. I have 20 years of competency in the software industry, and have a proven track record that will guarantee the successful realisation of your system requirements. I have designed and implemented systems used by multi-billion turnover corporations around the world, saving millions of pounds savings per year. My scope in system design and development ranges from individual utilities and embedded operating systems, through to large-scale corporation-wide distributed architectures. I am also able to provide a code debugging and fixing service, either onsite or online. I can give workshops and can facilitate training of new software developers, both in-house and online. I have managed my own team and maintained their skills matrices, ensuring training has been current. I have defined and managed new product releases and have written instruction manuals for new and "super" users at the customer end of the project.

    $105.56 /hr
    2,324 hours
    4.96
  10. Neil H.

    Neil H.

    Systems Administrator / Developer

    United States - Last active: 1 month ago - Tests: 9 - Portfolio: 1

    I am a Systems Administrator / Developer, available for freelance work on a per diem basis, or for a more long-term project/job. I am fluent in PHP, Python, and Bash, and have a knowledge of Java, C++, and have touched a few other languages.. I have a strong command of Linux/Bash, as well as Administration of both Windows and Linux servers (Specifically cPanel/WHM servers and CloudLinux) on a LAMP stack.

    $90.00 /hr
    0 hours
    5.00