Senior Java Developers & Programmers

Get Your Java Programming Project Started Today!

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. Gofur H.

    Gofur H.

    pro*C/C++, plsql, CSS, PHP, flex, AS3, Oracle, Ajax, OOP, C#, .NET

    Czech Republic - Last active: 10 days ago - Tests: 12 - Portfolio: 5

    Over the last 10 years, I have developed a wide range of websites using HMTL,DHTML,CSS, PHP, flex, actionscript including sites for startup companies and small businesses. My core competency lies in complete end-end management of a new website development project, and I am seeking opportunities to build websites from the ground up for you or your business. I also have solid skills in the following areas: MySQL, PostgreSQL, Oracle, Plsql, Interbase Pascal/Delphi, JDK 4,5 and 6JEE 5, c/c++, Pro*c, Web Services SQL, Ajax, OOP, and software design and testing.

    $38.89 /hr
    1,416 hours
    4.99
  2. Mauro Colella

    Mauro Colella

    Web Developer

    Switzerland - Last active: 1 day ago - Tests: 10 - Portfolio: 8

    Over the last five years, building up on my experience of information systems, relational databases, and Object Oriented Programming, I have developed and maintained proprietary web applications combining a PHP or JSP backend, rich media, and responsive frontends using HTML5, CSS3, jQuery, Bootstrap, Backbone, as well as a number of other frameworks. I have also worked frequently with either Java or Adobe Flex, on both the backend and frontend. I am completely fluent with either Drupal, or WordPress, and have developed and marketed premium items for the WordPress platform. I also have experience with more specific environments such as Facebook, Android, or Google App Engine. My primary competence lies in complete end-end management of web development projects, and leveraging the power of distributed systems to offset your costs, while increasing the efficiency of your organization. I want to build the web or mobile application you, or your business has been dreaming of. Because I can.

    $40.00 /hr
    409 hours
    4.60
  3. Alain C.

    Alain C.

    Java, Web and Google Maps Engineer

    United States - Last active: 2 days ago - Tests: 2 - Portfolio: 5

    Experienced professional with 6 years of experience of Java/J2EE web projects. I have a good knowledge of Google products and APIs as well (Google Maps, KML/KMZ). I also have a strong testing background (JUnit, JMock, Cobertura, Concordion, Selenium, Webdriver...) and developed a couple of testing frameworks based on these technologies. Specialties include: Java, J2EE, JEE, KML, KMZ, Google, Maps API, Javascript, AJAX, XML, SAX, DOM, JAXB

    Groups: Application Developers Alliance

    $74.00 /hr
    22 hours
    4.91
  4. David B.

    David B.

    Senior Mobile App (iOS/Android) & Server Back-end Developer

    Netherlands - Last active: 18 hours ago - Tests: 17 - Portfolio: 16

    *** Your Journey into Native Mobile App Development (iOS/Android) starts with me *** Full-Stack Native Mobile Apps & Web Services Expert Full Time support(40~60 hrs/week), Daily progress report & Skype live chat Long-term relationship contract & Money-back guarantee *** iOS/Android Application Development *** - iOS Native (XCode): Objective-C, Swift, Cocoa Touch, iOS7 & iOS8 Kitkat - Android Native (Studio/Eclipse): Java - Hybrid Apps: Xamarin (.NET), Phonegap by Ionic (Angular JS), Cordova SDKs, JQM, Kendo UI - Mobile Games: Cocos2D, Cocos2DX, Unity3D, Board SDK *** Mobile Application Services Support *** - Analytics and Testing : Google Analytics, Apptentive, Flurry, KIF testing framework - Back-End: JSON-RESTful APIs built on PHP MVC Frameworks for CRUD as well as 3rd Party SDK integration like Parse, Twillio - Services: Cloud, iBeacon, FB, Twitter, LinkedIn, Twitter, Google, Audio/Video (Wowza) Streaming *** Web Services Support *** - Main Tools: PHP, MYSQL, HTML5, DHTML, JQuery, CSS3 (Bootstrap & Responsive & Parallax) - JS Templates: AngularJS(Ionic), BackboneJS, NodeJS(XMPP), RequireJS - Common Templates: WP, Joomla and PHP MVC frameworks : CodeIgniter, Laravel, CakePHP, Yii and Kohana - Ecommerce: Magento, OpenCart, WooCommerce, Shopify and Prestashop I work as individual, supporting full time. I'm here to analyze your ideas and requirements and offer our vision of project realization. Rough quote will be ready within 48h. If it is acceptable for you, I'll prepare detailed project development plan indicating timeline and budget. I always make sure to bring you upon successive results of highly and creatively qualified results before your deadline and guarantees refunding for any unsuccessful results or issues which are responsible for me. I am seeking an opportunity to become a business partner with long-term relationship forever.

    Groups: Application Developers Alliance

    $70.00 /hr
    455 hours
    5.00
  5. Robert Kluver

    Robert Kluver

    Lifetime Internet Guru

    United States - Last active: 1 day ago - Portfolio: 5

    Well before the World Wide Web was a common phrase as it is today, before most people even owned a home computer I was programming code in a variety of languages for a variety of network related projects back when you had to put the handset of a telephone on a 300 baud modem. Trillions of lines of code under my belt and a mind that functions like a computer processing unit I not only understand today's most popular programming languages, I know how the languages themselves came to be. I am an expert who has owned, operated or worked with thousands of technology based businesses over the past 25 years. More than a programmer, I am a valuable consultant to any business wishing to build or improve any online enterprise. My work is relatively fast, accurate, functional and most importantly well constructed based on your exact needs. I do all of my own work but will bring in experts if necessary to accomplish the goals of your organization. I am an American living in Pennsylvania.

    $55.00 /hr
    7 hours
    5.00
  6. Ravi shankar S.

    Ravi shankar S. Agency Contractor

    1st Rank, Salesfroce Certified Developers with 7+ yrs experience

    India - Last active: 5 days ago - Tests: 3 - Portfolio: 1

    Over the last 7+ years, I have developed a wide range of applications on force.com platform. During this period I worked with each and every component of the Salesforce. I have provided exceptional quality work to customers. Here is a list of some of the work done by me and these apps are rated as very good on AppExchange: http://appexchange.salesforce.com/listingDetail?listingId=a0N30000003J6KcEAK http://appexchange.salesforce.com/listingDetail?listingId=a0N30000003IleFEAS http://appexchange.salesforce.com/listingDetail?listingId=a0N30000003J4NhEAK http://appexchange.salesforce.com/listingDetail?listingId=a0N30000003J4NhEAK http://appexchange.salesforce.com/listingDetail?listingId=a0N30000003J4NmEAK http://appexchange.salesforce.com/listingDetail?listingId=a0N300000030ptZEAQ http://appexchange.salesforce.com/listingDetail?listingId=a0N30000001tc1DEAQ http://appexchange.salesforce.com/listingDetail?listingId=a0N30000003Ilf6EAC http://appexchange.salesforce.com/listingDetail?listingId=a0N30000003J2fBEAS I am also having awesome experience on Data Migration, Integration, Web-services, Migration tools etc.

    Groups: salesforce.com

    Associated with: Simplyforce Technology Agency

    $40.00 /hr
    14,673 hours
    4.99
  7. Andrey Kozhuhov

    Andrey Kozhuhov Agency Contractor

    Drupal Association member, Certified PHP5 Developer

    Russia - Last active: 18 hours ago - Tests: 11 - Portfolio: 15

    Brainbench PHP5 Certified Developer. Drupal Association member oDesk Coding Challenge Champ - 9 years in web applications development using PHP, Python, JS, JQuery, MySQL - 7 years in Drupal development. - 4 years in SOAP,REST services development - 3 years of Windows development using Delphi, C#, C++ , WinAPI 5.00 1st Place! @ Advanced PHP 4.90 Top 10% @Drupal 6.14 4.75 Top 10% @PHP5 4.75 Top 10% @Java 4.75 Top 10% @DotNet 3.5 using C# 4.25 Top 20% @HTML 3.40 Top 20% @C++ You can check my tests, certificates and portfolio to be sure.

    Groups: Bluehost Developers and Designers, Coding Champs...

    Associated with: CimpleO,LLC

    $33.00 /hr
    871 hours
    5.00
  8. John Clarke

    John Clarke

    Web, Desktop Applications and Database Developer

    United States - Last active: 03/18/2011 - Tests: 1 - Portfolio: 2

    Over the past five years I have developed skills in HTML, PHP, MySQL VB, DotNetNuke, and C#. I have worked with both start-ups and established organizations. My strengths include a strong work ethic, versatility, and I am a quick learner. I have experience learning new languages and systems on the job. I am seeking opportunities to build applications or websites from the ground up or to join an existing team.

    $40.00 /hr
    1,697 hours
    5.00
  9. Giannis Z.

    Giannis Z.

    Web engineer

    Greece - Last active: 11/02/2013 - Portfolio: 18

    Over the last 5 years, I have developed a wide range of portals, web apps and websites using HMTL, Javascript, PHP, Java and SQL with various frameworks like Symfony and libraries like jQuery. My core competency lies in complete end-end management of a new website development project, and I am seeking opportunities to build web applications and websites from the ground up for you or your business.

    $133.33 /hr
    61 hours
    5.00
  10. Osam Aziz

    Osam Aziz

    Consultant, Project Manager, Full-Stack Dev, Sysadmin and Designer

    Canada - Last active: 11/18/2014 - Tests: 3

    As a full-stack developer with transferable skills and close attention to details, I am able to handle projects from start to finish with minimal supervision because I have an excellent general sense of what a product should and shouldn't do. I’ve designed and implemented many software systems. In most of the positions I’ve held, I’ve been involved in the full life-cycle of the project, from requirement analysis, initial design and implementation through to deployment and production support. My strongest technical expertise currently lies with Python (Django, Flask), PHP (Zend Framework, Laravel, Yii, FuelPHP, CodeIgniter), JavaScript (jQuery, AngularJS, Ember.js, Node.js), mobile apps (PhoneGap/Cordova and Corona SDK) and responsive web design with HTML5 and CSS3. I have also worked with a range of other languages and technology stacks, including Ruby, Perl, Shell scripting, Java, C#, Go, Lua and more.

    $59.00 /hr
    485 hours
    5.00