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.


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.

Last updated: May 1, 2015
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  1. Muhammad Nadeem

    Muhammad Nadeem Agency Contractor

    Android | iOS | Ionic | Angular Js | Sencha Touch | PhoneGap | Cordova

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

    I am ready to work as Mobile Apps Developer(Native and Cross-Platform) . Expert Area: -Android, IOS (native) -Ionic, Angular JS -SenchaTouch -PhoneGap, Cordova My Development Area : -Photo & Video Sharing App -GPS Location and Google Map Based App -Bar code/QR code Scanner App -Image Marker and GPS Location Based Augmented Reality App -Social Media Integration such as Facebook, Twitter, Google+, YouTube, Instagram, LinkedIn -Push Notification, In-App Purchase, Admob -UI/UX Design and Customization -Web Service Development using PHP/MySQL, JSON, XML -Github, Bitbucket, SVN and JIRA -Xcode, Objective-C, iOS 7/8, iPhone 4/5/6/6 Plus, iPad 2/3/4/Mini, iPod Touch My Promise : *Daily Communication *Full Time Working *On time and On Budget *High-Quality and Bug Free App *Clean and Well-Structured Code I will feel proud to be a part of your team. I have been working for many years with Android and Iphone projects. I have spent a significant part of my career also working as a Java Programmer and a Mobile Phone Developer. If hired by you, I will deliver my work to the highest quality.I am ready to be hired by you. Thanks

    Associated with: MDSol, Vigosol

    $33.33 /hr
    208 hours
  2. Gabriel Gircenko

    Gabriel Gircenko Agency Contractor

    Android Expert

    Croatia - Last active: 9 days ago - Tests: 4 - Portfolio: 8

    I am your full-stack Android app developer aspiring to be an elite one. Best at implementing UI. Responsiveness, communication, transparency and scalable/extensible code are my unique values. I have built a startup app from A-Z and know it all the way. If you want to have your App built, fixed, maintained or want your code to be scaled, I can help you make it happen! If you want a team worker, I am the CEO at Epigraph and a leadership and communication enthusiast. Here are some other things you should consider: - I am open and available for every long-term business relationship opportunity. I have the resources for any type of a mobile development job you need to get done. We are doing the job in a way which is rarely seen in the freelancing world. - You can give me very general tasks and I will make sure that it is done correctly on the deepest layers on which you don't need to worry. - I will always tell you what I am capable of doing and what I have never encountered and should research and learn so you can have better awareness of what is going on. - I like to be in constant touch with the client because it motivates me to do my best and brings me closer to an idea, especially when the client is friendly, but also professional. - I prefer instructions minimally day before programming, or if it is possible, weekly based instructions to be more effective with my time and be able to give you better progress reviews daily. Android Development Skills (self-rated from 1 to 5, meaning from inexperienced to best): User Interface - 5 Localization (easy translation) - 5 Debugging - 5 Networking, connectivity, REST, JSON, etc. - 4 Location detection, GPS - 4 Performance and Responsiveness - 4 Google Play store - 4 Using APIs and existing libraries - 4 Inter-app communication - 4 Optimizing UX - 4 Testing - 3 Threading - 3 Databases, content providers, content resolver, adapters - 3 In-app billing - 2 Touch screen keyboards and gesture recognition - 2 Sensors - 2 Services - 2 Media playback and recording - 2 Accelerated computation - 1 In my spare time I play drums, ride a mountain-bike and train recreational sports. Looking forward to get in touch with you!

    Associated with: Epigraph Android Experts

    $39.00 /hr
    352 hours
  3. Rabi D.

    Rabi D. Agency Contractor

    Expert SQL DB-BI Dev( 2014 - 2000), DBA, SSIS, SSAS, SSRS, MOSS,VS2014

    India - Last active: 26 days ago - Tests: 2 - Portfolio: 8

    Working with Data is a passion and would look forward to work for 40+ hours / week and develop All essential stages of BI DW solutions including detailed reporting dashboard solutions for large or Big Data solutions( SQL Server, SSIS, SSAS, SSRS, Excel - Pivot and its all services). I will bring in vast experience of 16 years of implementation to assist delivery team planning to reach higher success in very technically challenged scenarios. So far have been 100% successful in meeting customer expectation delivering best standards and sustainable BI/DW/DB-App solutions to a very wide industry domains and top enterprise customers. Proponent of low cost, high usability, highly sustainable, highly performing and accurate decision support solutions applying quality and reliable process to build customer confidence on their pet projects. SQL Enterprise application development experience: Rabi is very seasoned hands on SQL Server Sr Consultant with high success delivery rating in each project. He has very strong hands on expertise in all stages of end to end Enterprise Database Application, Business Intelligence, Business Application, Datawarehousing, Data Mining analytics delivering rich and practical best practices. He can help in your critical or large projects with his 13 years of exclusive database implementation experience ranging from mission critical solutions to poc with great details and fine tuning. Previously worked as SME/ Sr. Consultant with many TOP MNC and Fortune companies across the world like Microsoft, Infosys, Unilever, Ford, MakeMyTrip, Wipro, World Bank, Honeywell, Societe General, Advo, NY Columbia -Healthcare, NY Cornell, International Speciality Products, Quicken, Reliance Insurance, etc Rabi brings in overall Sixteen years of diversified hands-on IT experience of software development, design, BI solution architecture, implementations and testing. Highly experienced in MIS, BIS, EIS, CRM, based multidimensional OLAP/Business Intelligence, Data warehousing, Data Mining reporting analytical implementation and front-end reporting tool development. Expert in using SQL Server (2012 - 2000), SSIS, SSRS, SSAS, PPS, Power Pivot, MDX, Visual Studio (2012 - 1.52) and Excel based custom reporting. Highly experienced in real-time system software development and implementations. Extensive experience in object oriented design and development tools.

    Associated with: BITech

    $33.33 /hr
    1,333 hours
  4. angie tugade

    angie tugade Agency Contractor

    Web Developer/Designer, PSD to HTML/CSS/jQuery,Wordpress, Bootstrap

    Philippines - Last active: 3 days ago - Tests: 4 - Portfolio: 43

    Designing and developing usable, accessible and good looking websites is my passion. I'm particularly skilled with Wordpress engine/blogging, CSS 3 and HTML 5 coding/debugging, responsive web design and converting PSD to XHTML. I am also knowledgeable in site coding and have developed websites using ASP, HTML, DHTML, DOM, PHP, MySQL and have some experience using JSP, XML and AJAX. I do graphic designs also. I'm much familiar with Photoshop, Illustrator, Dreamweaver, Filezilla and Flash. I would like the opportunity to utilize my skills and creativity to effectively communicate design for the Internet and print using my skills and experience to create compelling and attractive websites. Visit my website at

    Groups: BigCommerce

    Associated with: Akukat IT Solutions, Blueshadow Digital Solutions

    $16.67 /hr
    1,928 hours
  5. Shivul P.

    Shivul P. Agency Contractor

    Django, AWS, iOS

    India - Last active: 1 month ago - Tests: 7 - Portfolio: 3

    Former oracle engineer turned entrepreneur/freelancer, seeking opportunities to build exciting web-products! I have more than 6+ years of django experience and 8+ years of IT experience. I enjoy learning about new technologies and implementing them for delivering compelling web products with awesome user experiences. My goal is to, collaborate with similar thinking individuals, to use technology to build products that can improve lives of people and are fun to use! I love Django/Python and am equally competent with front-end stuffs using JQuery/Bootstrap/Backbone.js/HTML/CSS. I do iPad app development too. Experience with AWS and scaling/optimizing websites for better performance. Graduated(Honors) from one of the top Engineering Colleges of India with major in Computer Science and Engineering.

    Associated with: Orange Factory

    $40.00 /hr
    484 hours
  6. Sugiarto U.

    Sugiarto U. Agency Contractor

    Senior Ruby on Rails Developer and Manager

    Indonesia - Last active: 1 day ago - Tests: 7 - Portfolio: 10

    Hello All, I am a senior ruby on rails developer. I like to learn and always learn. I want help you to solve your problems. Here what I can do for you: - Create app from scratch to enable your businesses - Develop new features for your existing apps - Fix buggy apps - Refactoring your apps source code. - Optimize your apps. - Create testing for your apps - Or maybe just question/answer for your problem. We can achieve points above using many technologies. - Database: mysql, redis, etc? - TDD/BDD development: cucumber, hudson,etc? - Background process: delayed_job, resque, etc? - Or Language it self: ruby,java,javascript..? - UI: html,js,ajax,jquery,prototype,css..? - Create API: REST,json? - Consume API: tucow, rackspace - Deployment: chef recipes Engineyard? - Versioning: git,svn? - hah.. there are ton technologies that we can use to solve problem, so the best way just communication :p. NEED MORE DEVELOPER/DESIGNER? I know I also limited by time, so If you need to solve problem, and need more developers/designers I also can provide them for you and I can manage them for you.

    Groups: Engine Yard Ruby on Rails Professionals Network

    Associated with: 27digits

    $44.44 /hr
    5,549 hours
  7. Pablo G

    Pablo G Agency Contractor

    iOS Mobile Developer

    Uruguay - Last active: 4 days ago - Tests: 4 - Portfolio: 33

    Over the past 5 years, I’ve developed a wide range of apps. My specialty is iOS development and I’m passionate about it! I have extensive experience with: - Xcode (I've been working with Xcode since version 3) - Creation of UI through interface builder and storyboards or programmatically - Management of the provisioning portal from an iOS developer account - Distribution of beta builds to beta testers through TestFlight - Creation of unit tests - Many iOS SDK frameworks like UIKit, CoreLocation, QuickLook, Store Kit, etc. - Integration of third party libraries like Flurry, Localytics, Tapjoy, etc. - Creation of App Store site on iTunes Connect and uploading app binary - Discovery of bugs and crashes in existing apps (and fixing these!) I participated in the WWDC in 2012 ( and I’m always up to speed with the latest iOS platform updates. I'm now seeking opportunities that will allow me to further develop my skills by providing creative and high quality solutions to my clients. I enjoy new challenges on a daily basis, looking to overcome my own high standard goals.

    Associated with: CodigoDelSur Agency

    $61.11 /hr
    2,345 hours
  8. Victor Vlasenko

    Victor Vlasenko Agency Contractor

    Founder and Senior Developer at SysGears

    Ukraine - Last active: 1 day ago - Tests: 4

    A senior developer with over 12 years of experience, focused on creating complex Java/Scala solutions. Especially efficient at software optimization and implementation of high performance computing systems. Fully dedicated to product quality, beauty of architecture and performance of the code. Technical Proficiencies: - Languages: Java, Scala, Groovy, JavaScript - Web Frameworks: Grails, Play 2, AngularJS - Frameworks: Akka, Spray, ZooKeeper - Databases: MongoDB, MySQL, H2

    Associated with: SysGears

    $30.00 /hr
    1,258 hours
  9. Sarthak Dudhara

    Sarthak Dudhara Agency Contractor

    Experienced Software Engineer

    India - Last active: 1 day ago

    Want to get something done? I am your guy. I have a 'get it done' attitude and constantly try to push the boundaries. Creating software for a startup to Fortune 500 Companies, I have done it all. Expert at Java, Search Back-end technologies like solr, elastic-search, javascript animations, CSS3, HTML5

    Associated with: Aubergine Solutions Pvt. Ltd.

    $35.00 /hr
    1,442 hours
  10. Arun Kumar Singh Rathore

    Arun Kumar Singh Rathore Agency Contractor

    Expert in Mobile Application Development

    India - Last active: 1 day ago - Tests: 2 - Portfolio: 3

    • A dynamic professional with around 8 years of experience in Mobile Application Development. • Architected many solutions for international customers. • Worked with MNCs like Capgemini, Mastek India, Mastek Malaysia, National Stock Exchange(NSEiT) etc. • Expertise in cross mobile application development using Titanium & PhoneGap. • Have experience in Android & Xcode SDK in develop. • Strong hold on state-of-the-art technology practices and tools

    Associated with: Interloper Corp Agency

    $15.00 /hr
    776 hours