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Find the World's Best Java Freelancers

Upwork is the leading online workplace, home to thousands of top-rated freelancers. It’s simple to post your job and get personalized bids, or browse Upwork for amazing talent ready to work on your Java project today.

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Andrei O. - iOS developer

Andrei O.

iOS developer

$32/hr
371 hours
Russia
100% JOB SUCCESS
“Andrei is one of the best freelancers who I have ever worked with on Upwork. He's extremely knowledgeable in the areas of iOS development. Andrei thought through some UX and UI...”
  • iOS Development
  • Swift
  • REST
Waqar U. - iOS/Android Developer and Web/Graphic Designer

Waqar U.

iOS/Android Developer and Web/Graphic Designer

$22.22/hr
266 hours
Pakistan
100% JOB SUCCESS
“Superb work, very experienced developer. he reads codes as clearly as you read my message here.”
  • Objective-C
  • ASP.NET
  • Java
Gaston C. - Unity3D Game Developer

Gaston C.

Unity3D Game Developer

$44.44/hr
83 hours
Argentina
100% JOB SUCCESS
“Gaston is the best developer I have worked with. He is really profesional. In my experience, when you develop an app, the feedback list is always long. He managed to solve all...”
  • Unity
  • C#
  • ASP.NET MVC
  • Java
Yaroslav R. - Rock Star Android Developer

Yaroslav R.

Rock Star Android Developer

$60/hr
439 hours
Russia
100% JOB SUCCESS
“Yaroslav is a very experienced android developer, and it is pleasure to work with him.”
  • Android
  • Java
  • Android SDK
Andrei I. - Java/Grails Developer

Andrei I.

Java/Grails Developer

$35.56/hr
5,631 hours
Germany
100% JOB SUCCESS
“Andrej is an awesome freelancer. We worked over 1 year together, in total more than 1900 hours. Definitiv one of the best you can hire at upwork, we will continue our collaboration...”
  • Grails
  • Java
  • Hibernate
  • Git
Shiv A. - Expert in  Data Analytics with Web Scraping

Shiv A.

Expert in Data Analytics with Web Scraping

$35/hr
94 hours
India
100% JOB SUCCESS
“Thank you for your great effort Shiv. He is a great developer, fast adapting, organised and reliable. We are very satisfied with the work and we are looking forward to working...”
  • Data scraping
  • Python
  • C#
  • PHP
Kostiantyn K. - Software QA Engineer

Kostiantyn K.

Software QA Engineer

$15.11/hr
4,117 hours
Ukraine
100% JOB SUCCESS
“Good job testing. Thanks!”
  • Software QA Testing
  • Java
Anton H. - Android Expert

Anton H.

Android Expert

$17.78/hr
60 hours
Belarus
100% JOB SUCCESS
“Anton is a very talented and hard-working developer. This project was quite complex, and had a very tight deadline. While other freelancers told us it'll take at least 2-3 weeks,...”
  • Android App Development
Lovely M. - Expert in PHP, Wordpress and Javascript

Lovely M.

Expert in PHP, Wordpress and Javascript

$14.44/hr
4,028 hours
Philippines
100% JOB SUCCESS
“I have been working with Lovely for over two years. She is very pleasant to deal with and has done an outstanding job. I plan to keep working with her.”
  • HTML
  • PHP
  • WordPress
  • CSS
  • AJAX
Tomasz D. - Senior Java Developer

Tomasz D.

Senior Java Developer

$35/hr
525 hours
Poland
100% JOB SUCCESS
“I asked Tomasz to join an ongoing project for total less than 20 hours left until finishing. He easily adapted and understood the requirements and asked the right questions about...”
  • Java
  • Spring Framework
  • SQL
Henry T. - Dedicated Mobile Developer

Henry T.

Dedicated Mobile Developer

$16.67/hr
403 hours
United States
100% JOB SUCCESS
“Tom and his team are great. We have made many apps with him.”
  • iPhone App Development

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What our customers are saying


At a Glance: Java Development

Java is a free, open-source, object-oriented programming language, plus a high-powered development platform used to build tiered applications and fast-running server applications. Because Java is a portable, “write once, run anywhere” language, Java developers are able to write code that is compatible everywhere. With components including libraries, frameworks (like Hibernate), Java APIs, the Java Runtime Environment, Java Plugins, and Java’s Virtual Machine (JVM), it’s fast and scalable, making it great for enterprise-level applications.

A highly skilled Java developer on Upwork can help build and maintain a high-traffic server-side application, or develop your Android mobile application with the Gradle build tool, an application programming software, which is based on the Java programming language. Core Java refers to a subset of developer skills within the platform—basic tools and knowledge that ensure the professional you’re engaging knows their way around the complex Java platform. Java developers handle server-side security and database architecture, using Java project management tools like Apache’s Maven. Java developers also handle software debugging, quality control, testing, and much more.

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Data Science, Machine Learning, and How an Upwork Freelancer Can Thrive

The world of data is shifting rapidly, and if you’re a freelance professional considering a move to data science, now is a great time to make the change.

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October 28, 2015

Web Development

The Basics of Compiled Languages, Interpreted Languages, and Just-in-Time Compilers

In this article, we’ll break down how code gets translated from the code programmers write, to the code computers read, the difference between compiled and interpreted code, and what makes “just-in-time” compilers so fast and efficient.

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June 10, 2015

Web Development

Choosing the Right Software Stack for Your Website

“Stacks” are bundles of software that comprise your site’s back end—everything from the operating system and web servers to APIs and programming frameworks. Learn more about what a stack does, why one component may be better for your project than another, and some other important things to consider when you’re choosing (or moving to) a stack.

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May 27, 2015

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