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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, 489 Java projects are completed every quarter on Upwork.

489

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 4.72.

4.72
Last updated: September 1, 2015
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  1. Giang Le

    Giang Le

    Full-Stack Groovy/Grails Developer

    Vietnam - Tests: 5 - Portfolio: 3

    Full stack developer with lots of experience in Grails, Java, J2EE, Hibernate, Spring, Struts, SpringBoot. Professional and academic background on architecting and building Multi-Tenant Software as a Service. I am a member of jcabi team. jcabi is a collection of small and useful Java components, which are not big enough to make their own projects. (http://www.jcabi.com/) I am also proficient in making bots,web crawlers, email scrapers , automation tasks based on selenium web driver/htmlunit and jsoup. I have been heralded as the "bot master" by various clients I have worked with due to my outstanding performance in automation jobs. My skill sets include: * Languages: Java, Groovy, SQL, C, Ruby, CSS, HTML, JavaScript, PHP * Frameworks Grails, Bootstrap, Ruby on Rails, Hibernate, Hadoop, Spring, SpringBoot, YII, Laravel * Libraries/APIs Java Collections, jQuery UI, jQuery, JAX-RS, Google Gson, JavaMail, Amazon API, Asterisk-Java, Selenium, HTMLUnit, Jsoup * Databases: - Relational: Mysql, PostgreSQL, Oracle, DB2; - NoSQL: Redis, Memcached, SimpleDB; In my case, I enjoy working with small businesses and individual decision makers to provide architectural and custom business solutions that help my clients resolve mission-critical problems, grow their business, and improve their revenue stream and profitability.

    $33.33 /hr
    6,123 hours
    5.00
  2. Leo J.

    Leo J.

    Engineer in Computer Science - Developer - Research

    France - Tests: 15 - Portfolio: 1

    Hello, I am a 27 years old engineer in Computer Science from France. After graduating from the Institut National des Sciences Appliquées of Rennes, I moved over to Sweden to follow a master program on Mobile Systems. Meanwhile, I was also working as a freelance web-developer/project co-leader for a Canadian company. While learning, I participated as a trainee to many professional project and learn to be flexible both in my ways of working in a team and on the technologies to use. Indeed, even so my major programming languages are Java and PHP, I could easily learn C# during my master thesis in Sweden and build up a nice piece of software to work with Sifteo cubes. Software architecture and system design are two of my strong background points, thus I thrive in realizing project from the beginning until the end. My professional experiences involved many non programmer and non computer scientist customers and allowed me to train establishing their needs and to translate them into sprints, backlog and deadlines. I also believe that knowledge in computer science without knowledge of the real world are wasted hence my interests for books, sail, roller-skating, ice hockey as well as environmental questions for instance. Looking forward to working with you.

    Groups: Application Developers Alliance

    $37.00 /hr
    645 hours
    4.96
  3. Aayush Jindal

    Aayush Jindal

    Software Engineer/ QA Tester, Forex Writer/ Forex Analyst

    India - Tests: 2 - Portfolio: 4

    SOFTWARE ENGINEER, QA ENGINEER, QA, FOREX MARKET ANALYST and FOREX WRITER. I have more than SEVEN years of experience in Software Environment including Development and Testing in Domains like Insurance, Accounts, Networking and Security. FOREX: I also follow Financial and Forex market closely and working as a professional Forex Analyst and writer. My content is daily published on top Forex sites such as FXSTREET and FOREXCRUNCH. I have more than five years of experience in the Forex market as an analyst and possess strong technical and fundamental analysis skills. MORE on SOFTWARE SIDE: I have worked in several Technologies for Software Development including Java and .Net. I have also Worked using Duck Creek Technology for Horace Mann Insurance, USA. I am seeking for some quality work to show my analytical, problem solving, communication skills and fast learning abilities.

    $6.00 /hr
    4,362 hours
    5.00
  4. Jaya A.

    Jaya A.

    QA- Website, Desktop, iOS & Android apps tester with 6000+ work hours

    India - Tests: 4 - Portfolio: 12

    Pointing out bugs and helping you develop a bug free product since 2005. *** 6000+ work hours , 40 + jobs, 100% Job success and ** Top Rated**  ISTQB certified in software testing  Full time Freelancer with excellent client review and 5***** in over 35 jobs  9+yrs in QA, testing of Web-sites,mobile, RIA , cloud and Desktop applications  Testing applications is my passion and my profession.  Able to Help in QA and Project Management Profile Overview  Availability 24*7 on Skype or Phone  Completed 5000 hours on oDesk  Good Knowledge of agile and Scrum methodology  Good Experience working with large remote team  Bug Reporting & tracking using Jira, Mantis, Bugzilla,TFS, Excel, Word  Test Plan,Test case design,execution & documentation  UI/UX/Front-end testing, Regression, smoke, black-box, white-box testing  Huge experience in testing iOS and Android based applications. ---------------------------------------------------------------------------------------------------------------- Over the last 9 years I have been involved in testing various types of software ranging from desktop applications to web applications including websites for start ups. - My core competency is in complete testing of the software from the planning phase to sign off. - Testing the software, Dealing with customer issues and closely working with the developers to get them resolved are the fields that I excel in. -I am an ISTQB certified software tester My expertise: --------------------------------------------------------------------- - Creating test plan document - Writing test cases - Documenting change requests - Executing test cases ( Functional, GUI, Usability, cross browser compatibility, Cosmetic errors) - Defect tracking - Writing product Release document - Managing customer issues and getting them resolved at the earliest - Writing technical specifications and FAQ's for websites. Application Tested ----------------------------------------------------------------------------------------- - e-Commerce Application(Magneto, WordPress,OpenCart and etc) - e-learning - Game Application, - ERP Application , - Mobile based Applications and Games - Healthcare and insurance application - Travel Domain - Finance domain - Social Networking website - Official websites for companies - WordPress website (Front end and Backend), - WordPress Plugin, - WordPress Theme - 508 compliance Testing - HTML and CSS validation - API Testing I have done include: --------------------------------------------------------------------- - Functionality testing - Cosmetic error testing - GUI Testing - Performance testing - Cross browser compatibility testing - Smoke testing - Regression testing - Usability testing - Games testing Trackers used for documenting and tracking bug status: -------------------------------------------------------------------------------- Trello Mantis Jira Bugzilla ASP.net starter kit Quality center Test director Microsoft excel and Microsoft office tools Gadgets I work on: ---------------------------- iOS 8.0 ( iPhone 4S) Samsung Galaxy Tab 4 ( Android 4.4.2 - Kitkat ) Operating Systems available to test: ----------------------------------------------------- Windows XP( IE9 , Firefox, Chrome, Safari ) Vista ( IE 9 , Firefox, Chrome, Safari, Opera) Windows 7 ( IE 10 , Firefox 35.0, Chrome 40.0, Safari, Opera) Windows 8 ( Firefox 35.0 , IE 11 , Chrome 40.0 , Safari ) QA methodology and processes: --------------------------------------------------------- CMMI, ISO, Agile Scrum ,waterfall model, V- model I am a disciplined worker, bound to deadlines who has great passion for quality. I assure you quality work in given time.I am also an article writer with great interest in writing IT related documents and answering technical questions. software testing, quality assurance, testing, sqa, manual-testing, smoke-testing, regression testing, quality control, software documentation, usability testing, functional testing, UI testing, boundary-value-testing,test plan creation,test-schedule-creation,test-plan-execution,test-case-generation, Redmine, Mantis, Microsoft Excel, Bugzilla, Jira, Microsoft Office Tools

    Groups: SocialEngine

    $11.11 /hr
    6,022 hours
    4.98
  5. Ifra M.

    Ifra M.

    Android developer

    Pakistan - Tests: 5 - Portfolio: 11

    Young, energetic and result oriented professional Android app developer, developing applications for Android smartphones and tablets. I have 3 years experience in developing native android apps. I am looking for long term relationship, not just looking for quick bucks; I am completely dedicated towards our work. Anyone can code; But coding wrt to optimum memory usage is what makes a quality oriented application. I've implemented LazyCollection and multithreading to handle 40K record's response fetched from SugarCRM servers for android client-server apps. LazyCollection was implemented to avoid OutOfMemory exception. Main Android features that I have worked on are listed below : - ✮ Web Service ( PHP, JSON, XML, SOAP, REST) ✮ Client - Server Android Apps ✮ Location Based Apps ( Google Maps, Google Places API, GeoLocation, GPS ) ✮ Facebook sdk Integration ✮ Barcode scanning ✮ MySQL, SQLite ✮ Alarm reminder ✮ Multithreading/Serialization ✮ Local Notifications ✮ GoogleAnalytics ✮ Advertisement ( Ad Mob, Ad whirl, RevMob, Chart Boost ) ✮ InApp Billing Subscriptions ✮ Robotium Version Tools :- ✮ GitHub ✮ Bitbucket ✮ Tortoise SVN

    $16.70 /hr
    87 hours
    4.99
  6. Mohamad Awada

    Mohamad Awada

    Customized Translation and Editing Services

    Venezuela - Tests: 4 - Portfolio: 2

    "I highly recommend Mohamad. He performed his task [...] with more care and efficiency than any other worker I have ever hired. He was proactive and understood instructions immediately [...]. He always submitted his work by the set deadline. When sent last-minute extra work towards the end of the project, he found imaginative ways to complete the additional workload quickly. Mohamad is fast, reliable, and remarkably thoughtful. [...] I am looking forward to continue collaborating with him in the future.” You're here because you (or your clients) are looking for translations that are "ready-to-publish". You hate working with mediocre translators that will end up costing you extra time and money, since their work will end up needing rounds of revisions. The testimonial I shared proves that you won't need to worry about the quality of my work, making me a valuable asset in your team.

    $35.00 /hr
    328 hours
    4.95
  7. Jordan Ringenberg

    Jordan Ringenberg

    PhD in Computer Science, Expert in C++, Python, MATLAB, Java, Web Dev.

    United States - Tests: 3 - Portfolio: 1

    Expert knowledge and over seven years of experience in object-oriented programming and agile development utilizing C++, Java, Python, Visual Basic, Objective-C, C#, MySQL, shell scripting, and web programming Software engineering and computer vision expertise, with numerous peer-reviewed published outcomes. Specialties include object-oriented design, algorithms, image processing and computer vision, and 3D modeling Expert-level experience in major development platforms including .NET, MATLAB, Linux/UNIX, Eclipse, and Cocoa Strong written and verbal skills, with proven track record in university teaching and scholarly publications

    $88.50 /hr
    187 hours
    5.00
  8. Ivan Stoev

    Ivan Stoev

    Software Developer

    Bulgaria - Tests: 5 - Portfolio: 4

    Computer systems and technologies graduate of the technical university of Varna with both a bachelor and a master's degree. Broadly interested in software development, mainly in Visual Basic and C#. Worked excessively with MVS and the .NET Framework. Took part in Junior Achievement Bulgaria in 2011, helped organize lectures as part of the MSP program and co-wrote a manual for laboratory exercises of said university.

    $11.11 /hr
    1 hours
    5.00
  9. Varuzhan Sargsyan

    Varuzhan Sargsyan

    C/C++/VC++, C#, Android Java

    Armenia - Tests: 4 - Portfolio: 4

    Over 5 year I was freelancer and have developed the Android applications. Made few apps which are on Google Play now and which are very perspective projects. And more then one year, I'm working as Senior Android developer in company. Look into my portfolio to find the project links I have freelancer experience working on C# windows forms, WCF, MS SQL Server. Project Internal Audit System with 10.000 clients. Project is working nowdays beginning from 2011. Duration of working period takes more then 2 year. Biginning from 1997, I developed in 3-4 companies and have experience in c/c++ programming language, using all Visual Studio versions. I made a lot of programs for a few companies and a production. Using strong knowledge, experince, my programs made companies work more easy and automated. Also I can speak English, Russian, Armenian, and the draft software for production was made using Russian language(menus, messages and all other tools).

    $20.00 /hr
    73 hours
    5.00
  10. Stefano Fratini

    Stefano Fratini

    Software Engineer / Java / PHP / Cloud / NoSQL / Cryptography

    Australia - Tests: 6 - Portfolio: 8

    I'm a software engineer based in Sydney I'm always after the simplest solution that deliver value to the business Areas of expertise - Web development (Java & Php) - Cloud computing (paas and saas) Google/AWS - API development - Security and Network Security - Mobile applications development (Android) with scalable Cloud Backends - NoSQL solutions - Mentoring and team management - Binary protocols (Hessian / Apache Thrift) Skills Programming languages: Php / Java Core / JEE / Android /Struts / Guice / Spring / Spring MVC, Hibernate / Google Application Engine / C/C++ Databases: MySql / MongoDB / Google Bigtable / Bigdata / CouchDB Interests: Cryptography / Secure API development Platforms: Windows / Linux (Ubuntu) / Linux ARM

    $55.56 /hr
    1,288 hours
    4.86