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, 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. Oleg Galant Agency Contractor

    Senior Java/J2EE Developer

    Ukraine - Last active: 09/17/2010 - Tests: 1

    Specialist with 10 years experience in software development. Over last 6 years I was working on web development using Java and related techs: JSF, Facelets, EJB2/3, JPA, Hibernate, Maven, HTML, DHTML, CSS, JavaScript. JBoss AS, Tomcat. Over last 5 years worked as team lead. Team and goal oriented.

    Associated with: KV4Solutions

    $33.33 /hr
    1,325 hours
    5.00
  2. Alexander B.

    Alexander B.

    Senior/Lead Full Stack Java Developer - Java, Spring, AngularJS

    Russia - Last active: 20 hours ago - Tests: 7 - Portfolio: 2

    My core strengths are algorithm design, deep knowledge of OOP and Java, web frameworks, and cloud services. I would like to apply these skills to helping build useful applications for big community. I have strong working knowledge of: - Spring (Core, Data) - Java core: Collections, Concurrent, I/O and etc. - Networking: TCP/IP - JPA, Hibernate, SQL. - Google Guava libraries, Lombok project, Swing, Maven. - Git, Jira, Redmine, Asana, CI (Jenkins). - Linux: I am comfortable with the bash shell, can perform system administration tasks (such as building, installing and configuring applications), and write complex bash scripts. Also I have working knowledge of the following tools, technologies, and practices - Web: frontend: HTML, CSS, XML, AngularJS, Jquery, Javascript, JSON, backend: Spring (MVC, Security), JSP, Google Web Toolkit (GWT), gson - Testing: Junit, Mockito, TDD - Application-as-a-Service: Google AppEngine (BigTable, MemCache, Billing Optimization) - Java: JDBC, JMX, JNI You can see an objective evaluation of my skills at: - Codingame website. Here held competitions for developers including solutions for non-trivial tasks: 1. Challenge scoreboard (23 November): http://www.codingame.com/cg/#!ranking:17:DontRelaX 2. Challenge scoreboard (25 January): http://www.codingame.com/cg/#!ranking:21:DontRelaX 3. Challenge scoreboard (22 February): http://www.codingame.com/cg/#!ranking:23:DontRelaX 4. Challenge scoreboard (26 April on Scala): http://www.codingame.com/cg/#!ranking:29:DontRelaX - Smarterer website. It's just additional tests passed by me: http://smarterer.com/DontRelaX I understand and regularly use OOP principles, including common design patterns. I tend to favor self-documented code that is easy to read, but I am happy to add additional documentation. I have experience taking projects from an idea to completion. I have a passion for programming, and take pride in improving my skills each day.

    Groups: Coding Champs

    $55.56 /hr
    1,054 hours
    5.00
  3. Aleksandr Nikiforov

    Aleksandr Nikiforov

    Senior Java Engineer. Full Stack Java/Spring/AngularJS

    Estonia - Last active: 1 day ago - Tests: 3

    Experienced and fast Java Engineer with 7 years of experience. I have extensive knowledge in: Core Java, Java Swing Javascript, AngularJS, Bootstrap, JQuery, html5, DartJS Groovy/Grails Google Web Toolkit, Google App Engine Spring, Spring MVC, Spring Boot, Spring Security Play Framework Hibernate ObjectiveC, iOS MySQL Test Driven Development/Agile/Maven/Git/Jenkins Also interested in algorithms, competitive programming and computer security. Passed numerous classes on Coursera. My iOS app: https://itunes.apple.com/us/app/easy-study-book/id888028166?mt=8 Check out my LinkedIn profile here: https://www.linkedin.com/in/aleksandrn

    $40.00 /hr
    145 hours
    5.00
  4. Sergey B

    Sergey B Agency Contractor

    Senior Java developer (Java EE, Spring, Talend,Hibernate, Oracle,GWT)

    Belarus - Last active: 06/03/2013 - Tests: 1 - Portfolio: 3

    iTechArt Group is a leading custom software engineering company focused primarily on establishing and operating remote fully dedicated teams for product development and customization, proof of concept and software prototyping, application modernization and re-engineering, QA and testing. Since 2002 iTechArt has been successfully acting as a trustworthy and reliable technology partner for both dynamically growing technology start-ups and well-established Fortune 500 companies. Headquartered in New Jersey, with two software development units in Eastern Europe and a talent pool of 500+ experienced engineers, iTechArt provides solutions to such companies as Oracle, GAIN Capital (forex.com), Pfizer, Kaspersky Lab, O2, Electronic Arts, 10Gen/MongoDB.

    Associated with: REMBROS CORPORATION DBA ITECHART GR

    $33.33 /hr
    1,265 hours
    5.00
  5. Micheal S.

    Micheal S.

    Groovy & Grails, Java - Freelance Developer

    Australia - Last active: 29 days ago - Tests: 2

    On the author list of bitcoinj project http://code.google.com/p/bitcoinj/source/browse/AUTHORS . However I did only contribute one patch, nonetheless this required reading c code and translating functionality into java. Worked with linux for 4 years, primarily Ubuntu. Eclipse is my primary Integrated Development Environment(IDE). Initially began programming with python, learnt a little bit of C++, including integration of python and C++. Unfortunately it has been at least 2 years since working with python and C++, so my knowledge of libraries and the languages has diminished. Currently spending a lot of time with Groovy and GRails. In the last two years programmed primarily in Java. Have experimented with github. Proficient in HTML5, CSS3, and javascript. Can read and write UML diagrams. Familiar with conventional Cryptography techniques, SHA, AES. Familiar with some Zero-Knowledge Cryptographic protocols. Available for video chat.

    $44.44 /hr
    1,176 hours
    5.00
  6. Alexey Paramonov

    Alexey Paramonov

    Senior Java/Scala Engineer/Architect

    Russia - Last active: 2 days ago - Tests: 9

    My Elance profile with established reputation: https://www.elance.com/s/aparamonov/ I'm very experienced software engineer with architect skills. I have great experience in Play! 2.0, MongoDB, Spring Framework, Hibernate, JSF (etc.). I'm walking on Agile way -- Code Review, Continious Integration, stand ups, frequent releases, etc. I'm been able to solve any technical issue, that we will be faced with. I strongly and deeply review all requirements before and while development process. I've worked in several projects as a Technical Leader.

    Groups: Application Developers Alliance, oDesk Verified Web Developers

    $67.00 /hr
    1,374 hours
    5.00
  7. Vitaly T.

    Vitaly T. Agency Contractor

    iOS / Android / Objective C / Java

    Russia - Last active: 20 hours ago - Tests: 10 - Portfolio: 5

    --oDesk has recognized me as one of their top Mobile Developers. See the badge on the right of my profile for more information.-- Hello, I'm Vitaly, professional mobile applications developer. I have over 5 years experience programming for iOS and Android. I have a good knowledge of Objective C and Java, big experience in object oriented programming. I always use newest technologies and solutions for development of high quality applications. My core skills and experiences in mobile applications development are: ✔ Interaction with backend - Restful / SOAP / JSON / XML ✔ Databases / Data Management - SQLite / MySQL / iCloud / Dropbox / Parse.com / Backendless ✔ Social Integration - Facebook / Twitter / Google + / … ✔ Maps / Geolocation / GPS ✔ Audio-, Video Live Streaming ✔ Game Development - cocos2d / box2d / OpenGL ES ✔ In-App Purchase / Advertisement / Push Notifications / App Analytics - iAd / Admob / Chartboost / Testflight / Flurry / Crashlytics / Google Analytics / HockeyApp I have experience working with IOS native and 3rd-party frameworks: ✔ AFNetworking / RestKit ✔ FMDB / CoreData / Magical Record / Mogenerator ✔ MapKit / Google Maps SDK / CoreLocation ✔ UIKit / CoreGraphics / QuartzCore / CoreAnimation ✔ AVFoundation / GPUImage / CoreImage ✔ CocoaPods ✔ etc If you need a high-performance and high-quality mobile application, I'll be glad to help you. With best regards, Vitaly

    Groups: oDesk Verified Mobile Developers

    Associated with: Deco

    $35.00 /hr
    2,620 hours
    5.00
  8. Tarka L.

    Tarka L.

    Professional Java Web Application Developer

    United Kingdom - Last active: 07/31/2013 - Tests: 5 - Portfolio: 19

    Over the past 7 years I have worked both freelance and as part of a large development team offering Web Application services for medium to large sized businesses. To date I have never failed to find a solution to a project. 99.9% of all the projects I have worked on have been delivered on schedule and on budget. I am as confident and experienced in both conceptualizing creative solutions that will work for you, as I am following clear and concise directions. I am a highly motivated, creative, and hardworking individual. I work with great attention to detail because I love my work and am committed to providing 110% satisfaction. Whether you're starting a new business or looking to revamp or extend an existing system, I can offer a complete solution that is fast, reliable, professional and tailored to suit your individual business needs and more importantly, your budget.

    $55.56 /hr
    950 hours
    5.00
  9. Marcel M.

    Marcel M.

    Senior Java and PHP developer

    Romania - Last active: 06/09/2014 - Tests: 5 - Portfolio: 1

    I strive to achieve quality, correctness, performance and maintainability in the products I write. I believe a good understanding and application of software engineering principles is more valuable than familiarity with popular APIs or toolsets. In particular, this makes one flexible enough to handle any sort of programming task. My experience is as Java developer and web sites using PHP. I'm also doing Android projects. I also have excellent experience in: HTML, CSS, mySQL, XML, json

    $33.33 /hr
    180 hours
    5.00