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.

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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, 584 Java projects are completed every quarter on Upwork.

584

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: June 1, 2015
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  1. Csaba Toth

    Csaba Toth

    High-Skilled Mobile Developer for IOS & Android

    Hungary - Last active: 15 hours ago - Tests: 9 - Portfolio: 11

    Hello *****Best Quality and Fast Speed******* I am Csaba Toth, a talented Mobile application developer. I have a good experience of Mobile application and games. Also, I have developed a lot of Desktop applications and web development. Mobile device platform: - iPhone 6 plus, iPhone 6, iPhone 5s, iPhone5, iPhone4s - iPad Air, iPad4, iPad3, iPad mini - Google Nexus 5, Samsung Galaxy S5, S4, S3, HTC One My skill-set: - Native: iOS, Android, Windows8 (Objective-C, Swift, Java, C#), JNI, NDK (C/C++) - Hybrid: PhoneGap, Xamarin, Titanium (HTML5, jQuery Mobile, C#) - Web service: XML/JSON, REST/SOAP - Cloud backend: Parse.com, Parse SDK, Parse REST, Parse Cloud Code, Amazon S3 EC2 AWS, Firebase, Twillio, Plivio - Chat & Messaging Engine: XMPP, Jabber, OpenFire, OpenTok WebRTC, Ejabberd, Erlang - Video/audio/image processing: OpenCV, GPU Image, CoreAudio, EZAudio, Pitch Control, Bass, AVFoundation - Video/audio streaming, codec: Wowza, Red5, H.323, MPEG-4 - VOIP, Cloud Communication: Twillio, Heroku, Tokbox - HTML5, PHP, ASP, JSP, C# and their frameworks - MySQL, SQLite, Oracle, SQL Server, ODBC - Facebook, Twitter, Linkedin, Instagram, Dropbox, Youtube, Pinterest, Vimeo - Google Map, Foursquare, Geolocation, GPS, Open Street Maps - Cocos2D, OpenGL, Corona, Unity3D, Box2D - Game Center, In-App Purchase, RPG server - iAd, Adwirl, Revmob, Admob, Chartboost, Tapjoy, Flurry, Testflight - Cloud services: Parse.com, iCloud, Rackspace, Zoho CRM, Salesforce, Azure, AWS, EC2, Dropbox

    Groups: Application Developers Alliance

    $44.44 /hr
    284 hours
    4.80
  2. Sergio S.

    Sergio S.

    JEE Architect - Developer / ExtJS Developer

    Guatemala - Last active: 15 hours ago - Tests: 5 - Portfolio: 5

    Highly skilled systems architect and developer with more than 25 years of experience designing, developing and deploying applications, from old single platform “green-screen” to multi-tier / distributed systems. Business experience in manufacturing, accounting, distributing, payroll, finance and TELCO: ✔ Strong knowledge of Java SE and JEE stacks, from early versions 1.x up to latest version SE 7 and JEE 6. ✔ Deep understanding of old technologies such Cobol, ISAM, flat files, pipes, “green screen”, etc. This knowledge allowed me to design, code and implement integrations between new applications with legacy ones. ✔ Solid leading and mentoring skills to help and encourage individuals to maximize their productivity by applying the best practices, frameworks, libraries and technology in general. ✔ I'm always learning about new technologies and tools to ease and reduce time spent in application development and deployment. Technology by itself is worth nothing if it does not solve real world problems.

    $45.00 /hr
    652 hours
    5.00
  3. Martin Benka

    Martin Benka

    Native Android, iPhone, Phonegap, Web expert, Server developer

    Slovakia - Last active: 3 days ago - Tests: 8 - Portfolio: 11

    Welcome to Visit my profile I am a native Android and iPhone, Phonegap, Web expert with creative skills and enough experience, strong knowledge. I am not agency and I am a independent freelancer. I expect to work with a good provider who want to explore wide areas of Android and iPhone. With over 5 years of Mobile app developing experience, I would enjoy helping my provider. Over the last 5 years, I have developed Android applications such as below *****Possible Both development and design***** For Android and iPhone, Phonegap --GPS+Google Map+Web Server(PHP)+Social Media Application --Shopping and Dating Application --Phone control Application using Web Server --Push Notification(SMS) Application using GCM --Phonegap/Cordova Application --VoIP, SIP Application --Music and Video, Photo and Camera Application Besides I have great experience in Mobile app developing. I have broad knowledge of following as : ***Possible Both Backend and Frontend*** 1) Web developing with PHP, HTML5, CSS3, jQuery 2) 2D Graphic design and Logo design, 3) Photo edit, Audio and Video edit, etc. 4) Adobe-Flash animation So I make sure all of my projects have a smooth, professional look. I am a responsible person who cares about deadlines and client's opinion, quality of product. I have many experience of Android and iPhone app, Phonegap, Web developing in oDesk and Elance, Freelancer sites. My experience for Android application development https://play.google.com/store/apps/details?id=com.tapporo&hl=en https://play.google.com/store/apps/details?id=com.mindfreelabs.mintcoins https://play.google.com/store/apps/details?id=com.junobe.android.junowallet https://play.google.com/store/apps/details?id=com.inova.android.outee https://play.google.com/store/apps/details?id=com.celebratedchefs.celechefs https://play.google.com/store/apps/details?id=com.zoho.invoice&hl=en https://play.google.com/store/apps/details?id=appinventor.ai_optimizationtutor_com.aWi th_Love My experience for web site development http://marketnews.se/ http://whatculture.com/ http://www.thaimassageguiden.se/ http://www.cineblog01.net/ Thank you for your attention to me. Best regards.

    $33.33 /hr
    262 hours
    4.99
  4. Eric Bouchard

    Eric Bouchard

    Senior Software Engineer

    Canada - Last active: 2 months ago - Tests: 11 - Portfolio: 3

    I have 13 years of experience in IT. 7 years as a Web Applications Analyst and Developer for a major Canadian Bank and 4 years as a software engineer/architect for an international software company. I led multiple projects of small/medium size. Also 3 years of experience on the bank core systems on IBM MVS with COBOL. I personally developped as a personal projet www.sffmeta.com. I also developed the www.scanthing.com Android OCR application. I have a lot of experience with communicating with systems end-users. I can speak both english and french.

    $60.00 /hr
    6,817 hours
    5.00
  5. Aleksandr Tolstikov

    Aleksandr Tolstikov

    Drupal / PHP expert

    Russia - Last active: 15 hours ago - Tests: 4

    Over 8000 hours on oDesk (only Drupal related). Highly motivated, goal-oriented, hands-on senior software engineer with extensive technical skills and over 15 years of experience in software development. - Expert knowledge of Drupal CMS; - In-depth knowledge of systems architecture and software design methodologies; - 10+ years of experience in web application development using PHP; - Extensive experience in relational database management systems, mainly with MySQL; - Experience in Linux systems administration; - Strong understanding of networking/Internet protocols and formats; - Experience in architecting, implementing and maintaining full-text search platforms;

    Groups: Bluehost Developers and Designers, Drupal

    $40.00 /hr
    8,441 hours
    5.00
  6. Dimitris Manikis

    Dimitris Manikis

    Software Architect

    Greece - Last active: 15 hours ago - Tests: 1

    Software architect and solutions architect experienced in Enterprise Architecture, SOA, Telecoms, Machine Learning, Information Retrieval, Data Mining with focus to solutions based on open standards and open source software. Software Development experience since 1994. Last 10+ years working mainly with Java based technologies. Quick learner, self motivated, passionate about learning new technologies, have worked in a couple of start-ups from the ground up and in various areas of an enterprise such as architecture, software development, R&D, business development and project management.

    $55.56 /hr
    3,521 hours
    5.00
  7. Vitaly Sas

    Vitaly Sas

    Expert Android developer

    Belarus - Last active: 4 days ago - Tests: 3 - Portfolio: 3

    I specialize in developing Android apps and have over 4 years of experience in commercial app development. I'm looking for a interesting projects to do a really good job. Challenge me and I'll do my best to create high-quality app in order to meet your wishes. I look forward to working with you. Thank you for reviewing my oDesk resume. Best regards, Vitaly Sas.

    $33.33 /hr
    1,375 hours
    4.90
  8. Eric S.

    Eric S.

    Senior Web & Mobile Expert

    China - Last active: 15 hours ago - Tests: 32 - Portfolio: 25

    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
    10,890 hours
    4.95
  9. Gonzalo Hardy

    Gonzalo Hardy

    Senior Iphone Developer

    Argentina - Last active: 15 hours ago - Tests: 1 - Portfolio: 4

    I have more than 4 years of experience working with native iphone applications for different companies and clients, working from the project planning up to the end, managing a small group of developers. I've worked in advertising, logic games and utilities, using SVN and GIT environments. Interaction with native flow (NavigationBar, TabBar and screens animations), Communication with servers (HTTP and HTTPS) and Data storing with CoreData and MySql. I've worked in both, applications and products. I've being working on Nearpod for more than a year (and still working on it), adding new features and improving both usability and performance, working from the design of the application to it's implementation. I'm able to work as a "team leader", organizing tasks and schedules, but I prefere to be "that developer who takes the hard tasks and focus on it". I really like challenges. Referred Applications (in AppStore): “Prius Experience”; “Plinkt”; “MathKnack Genius”; “ContactMe”; “My Scotts Lawn”; "Nearpod"

    $38.89 /hr
    1,534 hours
    4.95
  10. Zdenko H.

    Zdenko H.

    Full Stack, Backend Developer

    Czech Republic - Last active: 1 day ago - Tests: 6 - Portfolio: 4

    During my years as a software consultant, I have realized that communication with client is most crucial. That's why I make every effort to understand requirements of the task that's need to be done, remove ambiguities, make thorough analysis, suggest solution and implement. My expertise is in programming Python / Django / Google App Engine (Google Cloud Platform) projects. Beside that I have knowledge of other web technologies (HTML, CSS, Javascript...) and Java. I am very open to new challenges and problems. I prefer working on Linux. I am constantly improving my skills and knowledge in all areas. Experience with scrapping e-shops, real estate websites using BeautifulSoup Experience with other Python frameworks like Webapp2, Flask and Bottle For frontend I am comfortable working with Angular JS.

    $37.00 /hr
    825 hours
    5.00