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
More options
Clear all filters
  1. Simon Weingand

    Simon Weingand

    Senior iOS and Android and Back-end Developer

    Germany - Last active: 16 hours ago - Tests: 15 - Portfolio: 2

    Thanks for reviewing my profile As a creative and passionate professional programmer with 10+ years of experience. Major skills: - iOS, Android, Phonegap/Cordova(jQueryMobile, SenchaTouch, Ionic) - Objective-C, Swift, C/C++, Java, - PHP/MySql, Ruby on Rails, AngularJS, Node.js, Javascript, HTML, CSS, jQuery - Parse.com, Amazon, Heroku, MongoDB, RESTful API, AJAX, JSON/XML, RSS - Facebook, Twitter, Instagram, Google+, VK, Foursquare - Paypal, Stripe, In-app purchase - Google App Engine, Google Map Api, Google Drive, GPS, BLE, NFC, iBeacon, VOIP - Git, Bitbucket, Testflight

    $57.00 /hr
    1,098 hours
    5.00
  2. David B.

    David B.

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

    Netherlands - Last active: 16 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
  3. Martin Benka

    Martin Benka

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

    Slovakia - Last active: 1 day 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. 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
  5. Denis M.

    Denis M. Agency Contractor

    Senior C++ Developer

    Russia - Last active: 1 day 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
    4,508 hours
    5.00
  6. Muhammad Usama

    Muhammad Usama Agency Contractor

    Senior Software Engineer | Scala and Distributed Computing Expert

    Australia - Last active: 13 days ago - Tests: 4 - Portfolio: 2

    - 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
  7. Arsalan Mehmood

    Arsalan Mehmood Agency Contractor

    Expert mobile app developer - Android & iOS

    Pakistan - Last active: 16 hours ago - Tests: 3 - Portfolio: 16

    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
  8. Usama Riaz

    Usama Riaz Agency Contractor

    Expert Android Developer

    United States - Last active: 16 hours ago - Tests: 8 - Portfolio: 11

    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
    430 hours
    5.00
  9. Usman F.

    Usman F. Agency Contractor

    Experienced Web Developer

    Pakistan - Last active: 1 day ago - Tests: 5 - Portfolio: 6

    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. Josh M.

    Josh M.

    SQA/Testing/Security/Networks/Development/Technical Writing(Canada)

    Canada - Last active: 3 months ago - Tests: 9

    Over my career I have been handed a great many challenges and I have throughly enjoyed finding solutions for my clients problems. I have not limited myself specifically to one area but many, and have enjoy a diverse technical career. I am a skilled, hard working, dedicated IT professional with over 10 years of experience. I have development experince in numerous languages and specialize in PHP/MySql web development and Linux/Windows scripts and applications. I have excellent communication skills and am available at your need.

    Groups: Bluehost Developers and Designers

    $55.00 /hr
    8,385 hours
    4.98