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. Erik Hansen

    Erik Hansen

    Unity, Augmented Reality, Virtual Reality, Xamarin, C#, iOS, Android,

    Denmark - Last active: 1 day ago - Tests: 8

    Hello everybody. I am a professional and expert software developer. I have 7+ years of development experience. Mobile App / Game : Native iOS, Android, Windows Phone Expert Skill: Augmented Reality, Virtual Reality, Motion Sensor, C#, Unity, Xamarin programming language : C/C++, C#, Objective-C, Swift, Java, Java Script, Delphi, open source library : OpenGL, OGRE, OpenCV, FFMPEG, VLC, Chromium, Technologies ready: - Mobile application / game development.(iOS, Android, Windows Phone) Native( iOS , Android, Apple Xcode, Objective C, Swift, Java, iOS8, ) Fitness App, iOS8 Keyboard Extension, Photo/ Video processing , Uploading, Web service interaction, Xamarin (C#, Visula Studio, Xamarin Studio, iOS, Android, Windows Phone) Unity(C#, JavaScript, Shader, NGUI, Unity 4.6 UI, Prime31 Plugin, Multiplayer, 2D, 3D, Social Game) - 3D rendering: OpenGL, DirectX, WebGL, OGRE engine, Shader (Pixel Shader, Vertex Shader, HLSL, GLSL) 3D Rendering Optimization, 3D rendering Engine Development. - Augmented Reality experience of AR Engine Developmet Vuforia, Metaio, Wikitude, ARLab SDK integration with Unity , iOS, Android Geolocation based AR, Image Recognition, Tracking Cloud database, Face Tracking, Modeling QR code Recognition, AR movie, video Custom Camera Cature AR Game. - Virtual Reality Oculus Rift, Google Cardboard, Google Glass, Samsung Gear VR VR 3D Video Player ( SBS, Over Under 3D Video , 360 degree) Motion Sensing ( Leap Motion SDK, Kinect, Extreme Reality ) - Media Streaming VLC, FFMpeg - Image Processing Aviary SDK - Social Networking Facebook, Twitter, Linkedin.. Parse.com, Gamesparks.com, Shephertz.com (App 42, Appwarp) Platform: Desktop Applications (Windows, Mac OS, Linux): QT, C++, Java Mobile Applications (iOS, Android, Widows Phone, Black Berry) Objective C / Xcode, Java / Eclipse, Unity, Xamarin, Phonegap,

    $55.56 /hr
    302 hours
    5.00
  2. Martin Benka

    Martin Benka

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

    Slovakia - Last active: 1 day ago - Tests: 6

    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
    257 hours
    4.99
  3. Renato Stanic

    Renato Stanic

    Game developer for 7 years now.

    Croatia - Last active: 1 day ago - Tests: 2

    I am an experienced Unity and UE4 programmer and designer. I have 7+ years of experience in game development of which 3 in Unity, 3 in Java and in UE4 since it came out around 11 months. I have experience with working alone and in teams, I know how to communicate with any members of a development team. I have used a wide range of version control and ticket tracking software, and therefore I know how to structure goals to meet deadlines. Listed below are my technical skills. — Programming languages: C/C++, Java, JavaScript, C#; — Java libraries: Slick2d, LWJGL; — Data/Markup: XML, XML Schema, JSON, HTML/CSS; — IDE: Visual Studio, Eclipse, Intellij Idea; — Asset Creation Software: Blender, Maya, 3dsMax; — Texturing Software: Photoshop, dDo, nDo, 3Do, MegaScans; — OS: Android, Linux, Windows, Mac OS X; — VCS: Git, SVN, CVS, Perforce; — Engines: Unity, CryEngine, UDK, Unreal Engine 4; — Utility: Makefile.

    $33.33 /hr
    307 hours
    5.00
  4. Kurt Waldowski

    Kurt Waldowski

    Programmer, Designer, and Artist || kwaldo.com

    United States - Last active: 1 day ago - Tests: 2 - Portfolio: 3

    Kurt Waldowski is a multi-talented developer that has been creating games, web sites, and web applications for over 5 years. Programmer, designer, and artist, Kurt has taken part in every end of the development process. He is currently attending the University of Michigan to earn his degree in Computer Science. Kurt only bids on projects he is genuinely passionate about, and as a result, he guarantees satisfaction. He often bids with longer time constraints in order to account for potential reiteration. This assures that your vision is brought to life the way it was envisioned.

    $45.00 /hr
    0 hours
    5.00
  5. Nathaniel S.

    Nathaniel S.

    Senior Software Developer

    Canada - Last active: 4 days ago - Tests: 2 - Portfolio: 2

    I have extensive experience developing enterprise-grade network-based web applications and desktop software for clients in government, health care, finance, and academia. I'm the lead developer on several web-based and game engine products, some open-source. I'm strongly familiar with major proprietary and open source development tools and libraries. I'm both an experienced team leader and a fast and reliable solo developer, and as an entrepreneur I understand how to balance high-quality work with the need to ship. I have an academic background with training in both statistics and research methodologies, so I particularly enjoy working on challenging projects that require analysis and creative problem-solving, and which aren't simply clones of existing software. I look forward to working with you!

    $80.00 /hr
    0 hours
    5.00
  6. Denis M.

    Denis M. Agency Contractor

    Senior C++ Developer

    Russia - Last active: 12 hours ago - Tests: 1

    For long years of my experience, I finished different kinds of projects. Now in every project I easily can show all my professionalism and high quality. I’m interested in projects where I could apply all my technical and communication skills. I have responsibility to manage projects and share my experience with young developers and help them to solve difficult problems.

    Associated with: ISS Art, LLC

    $36.11 /hr
    4,507 hours
    5.00
  7. Muhammad Usama

    Muhammad Usama Agency Contractor

    Senior Software Engineer | Scala and Distributed Computing Expert

    Australia - Last active: 9 days ago - Tests: 4 - Portfolio: 1

    - 7+ year of web development experience Complete web solutions from template designing to deploy dynamic web portals including ecommerce. - 4+ year of mobile development experience. Using native development of iOS and Android to cross-platform frameworks. - Why you should hire me? I believe my success is not just to provide the high quality work and meet all the deadlines but rather success of the project itself, solution delivery, and contentment of the client is more important to me.

    Associated with: The Fast Crew

    $50.00 /hr
    118 hours
    5.00
  8. Arsalan Mehmood

    Arsalan Mehmood Agency Contractor

    Expert mobile app developer - Android & iOS

    Pakistan - Last active: 2 days ago - Tests: 3 - Portfolio: 20

    Over the last 5 years, I have developed a wide range of native mobile apps for Android (Mobile, Tablet) & iOS (iPhone, iPad, Apple Watch) platform and web applications using (PHP, Node.js) which including apps for startup companies, small & large businesses. My current area of interest is complete management of a mobile app development project from designing to publishing on app store. MOBILE BACKGROUND Good knowledge of Mobile UI patterns, guidelines., low-level performance optimizations and memory management. I not only know how to make an application work, but also know how to make it work fast and smoothly. Following are my achievements & skills ✔ Member of "Upwork Verified Mobile Developers" group ✔ Developed two apps which were covered by CNN ✔ Android: Java, C++, JNI, NDK (Mobile & Tablet) ✔ iOS: Swift, Objective-C, Cocoa-Touch (iPhone, iPad & Apple Watch) ✔ Payment Gateway: PayPal, Braintree & In-App Purchases ✔ 3rd party APIs like Facebook, Twitter, Linkedin, Instagram, Youtube, Pinterest, Foursquare ✔ Google Map, Geolocation, GPS, Open Street Maps, Navigation ✔ Ad platforms: iAd, Adwirl, Revmob, Admob, Chartboost, Tapjoy, Flurry, Testflight ✔ Speech recognition, text-to-speech, Siri, OpenEar ✔ Video/audio/image processing: OpenCV, Pitch Control WEB BACKGROUND I am a professional front-end & back-end developer with wide knowledge of many modern technologies in web development stack using which I could solve the programming task of any complexity for you. I can do a lot of server side work: from designing of data model to implementing business logic. I have an experience in the designing of Restful APIs for huge web services. Following is my skill set: ✔ Front-end: HTML/HTML5, CSS/CSS3, JavaScript, jQuery ✔ Web development: Ajax, Node.js, PHP, ASP.net ✔ Web service: XML/JSON, REST/SOAP ✔ CMS: Wordpress, Joomla, Magento ✔ Cloud backend: Parse, Amazon, Firebase, Digital Ocean, Twillio, Plivio ✔ Cloud Communication: Twillio, Tokbox ✔ MySQL, SQLite, Oracle, SQL Server, ODBC ✔ Cloud services: iCloud, AWS, EC2, Dropbox ✔ Online Payment Gateway: PayPal, Braintree. Other expertise: ✔ JIRA, Github, BitBucket, SVN, GitLab

    Groups: Application Developers Alliance

    Associated with: Virtual Proz

    $50.00 /hr
    992 hours
    4.96
  9. Usman F.

    Usman F. Agency Contractor

    Experienced Web Developer

    Pakistan - Last active: 1 day ago - Tests: 5 - Portfolio: 12

    I am a lead developer and architect with more than 9 years of experience. I have developed various applications using Python, Django, Java and php that are hosted on Google App Engine and Amazon Web Services. With strong analytical skills; I'm excellent in developing optimized and highly scalable back-end services and web solutions. Developing a technology solution requires more than just programming skills so I can help translate your ideas into working software. I have participated in all phases of system development including design and architecture, implementation, debugging, integration, testing, refactoring and maintenance. Along with modern web applications, I also have developed several SaaS (Software as a Service) systems and mobile back-end solutions that are optimized and scalable for millions of users. I'm fluent of different frameworks, tools and technologies including; Google App Engine, Amazon Web Services, Cloud Storage, Cloud SQL, Ndb Datastore, Memcache, Backends, Payment Gateways, GCM, APNS, Python, Django, MySQL, Flask, J2EE, PHP, Git, JQuery, Javascript, CSS, XHTML

    Associated with: AlfaTech Labs

    $38.89 /hr
    435 hours
    5.00
  10. Usama Riaz

    Usama Riaz Agency Contractor

    Expert Android Developer

    United States - Last active: 18 days ago - Tests: 8 - Portfolio: 9

    I am driven, ambitious, and intensely interested in what I do. I taught myself how to program five years ago and have since become an expert in numerous programming languages and technologies such as Java, C++, PHP, Objective-C, and MySQL. My programming expertise paved the way for me to start a software development company called Minibit Technologies, where I have had the pleasure of working with clients from around the world on numerous interesting and challenging projects such as Twitter-like social media sharing apps, real-time multiplayer games, and ultrasonic communications systems. I don't want to bore you with a comprehensive list of my skills, so I'll just list a few of the more notable ones: Languages: Java, C++, PHP, Objective-C, Javascript, Octave Platforms: Android, iOS, Web Game Development: Libgdx, Box2d, Native Android Miscellaneous: Machine Learning, Git, Parse Talk is cheap, though. Please take a look at my portfolio projects, my oDesk test scores, and my review ratings for a more thorough assessment of my abilities. You will quickly find that I do not merely develop software - I develop highly maintainable, elegant code that will save you enormous sums in the long run. In short, if you need an app, website, or other software developed, look no further. My coding skills are incredible, my work ethic unparalleled.

    Associated with: Minibit Technologies

    $70.00 /hr
    424 hours
    5.00