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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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Last updated: October 1, 2015
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Andrew S. Agency Contractor

Web developer (J2EE, Flex, Python)

Ukraine - Tests: 4 - Portfolio: 9

4+ years xp in development of web-apps, complex sites and services that require scalability and conformation to the most current web standarts. You are welcome to use my strong skills in (D/X)HTML, CSS Layer 1-3, JavaScript/Ajax, XML/JSON, Python, Java EE with modern frameworks and different database engines such as MySQL, PostgreSQL, Oracle for developing featured web-2.0 websites as well as multitier enterprise-level web- applications. In my developing practice I use modern MVC/ORM/Ajax frameworks (such as jQuery, prototype-js, Spring, Struts, JSF, Hibernate, Tiles, etc. - take a look at the rest of my profile for details) in combination with strong OOP, design patterns, unittesting. That's why you'll get the product built using the best programming practices instead of "inventing the wheel". Over the last years I was working in relatively big outsourcing company. So it's usual for me to be envolved in a full development cycle of big web- applications, communicate with customers, have business trips to other countries and participate in remote teams.

Associated with: Streamfront Software, Team Technologies LLC

$25.00 /hr
357 hours

Thomas Congrove

Thomas Congrove

Software Developer, Production Support, entry level DBA ltd. avail.

United States

Currently working as an Sr. IT Applications Developer for a Fortune 100 company. Recently retired from a two year tour as a software engineer and DBA for the military. My availability is limited by my primary development job, but if you have something small or just want a second set of eyes on your project, I'd be glad to assist!

$25.56 /hr
27 hours

Robert Schwin

Robert Schwin

Game Designer / Software Developer

United States - Tests: 1 - Portfolio: 1

Hi, I'm Paul. I have a passion for making fun games that offer unique and engaging experiences. Over the past decade or so, I've written and designed several tabletop roleplaying games. More recently, I've turned my attention to software development, and I've had a great time creating virtual universes ever since. My specialties include: game design, user experience, Unity 4.x, C# scripting, object-oriented programming, 2D and 3D physics, procedural generation, writing, editing, management. I have experience with: Objective C, Javascript, Python, Java, HTML 5 I am eager to learn more about: Artificial intelligence, path-finding, mobile/ web development, 3D animation.

$33.80 /hr
347 hours

David Lundquist

Software engineer


Summary Ever since I can remember technology has been an important part of my life, this has taken me from founding my own small technology company back in Sweden to working on projects all over the world. This same focus on technology also allows me to have a broad understanding of how technology is evolving and it has given me the ability to widen my knowledge which is now spread across several different kinds of technological areas. References will be provided upon request. Specialities I am an experienced developer within the mobile sphere having built both back office software as well as fully fledged content delivery and billing solutions for some of the biggest carriers in the world. Ive had several titles in top lists in the apple appstore and on carriers across the world. While mobile has been my main focus the last couple of years my base lies in web where I have developed solutions to allow companies of all sizes to have a presence on the web. I’ve built systems and websites for everything from small local companies to big global companies. For the last couple of years my focus on web has been towards Ruby on rails using a BDD philosophy having finished both big and small sized projects by successfully leveraging cucumber acceptance tests and story writing as well as unit tests based around rspec. While being a partner in different businesses I have also gathered skills in business planning and management.

$66.67 /hr
22 hours

Oleksii A.

JavaSE/JavaEE Developer, PhD in Information Security

Ukraine - Tests: 5

Enterprise and Web Application Developer. PhD in Information Security. Especially interested in building complex (transactional, concurrent, secured, scalable etc) Java/J2EE based systems. Strive for creating systems based on sound technical designs by applying OO design concepts and software patterns.

$38.89 /hr
1,277 hours

Victor Macik

Victor Macik

Software Developer

Germany - Tests: 1

Over the last 12 years, I have developed a wide range of websites and backend solutions using Java, C++, PHP, and MySQL including sites for different scales of clients. My core competency lies in complete end-end development of backend solutions, along with turn-key products. Feel free to consult with me on any matter, as I'm working independently I promise to provide help even if you aren't interested in conducting business together - this is just the friendly way.

$33.33 /hr
33 hours

Alexander C.

Alexander C.

Scala / Java / Haskell developer, Full Stack Engineer, Consultant

Russia - Tests: 2 - Portfolio: 2

Java developer with 8 years of experience. Now also Groovy(2 years) and Scala(1.5 years) developer. Java: Hadoop, Nutch , Lucene/SOLR/ElasticSearch, Morphia(MongoDB ORM), parsers/crawlers(using Apache Httpclient, HtmlUnit and own microframework), Web MVC(Struts 1.x/Grails), Java Desktop Applicatins(Swing) / Applets, webservices (w. Restlet framework), RabbitMQ Java client, Riak Java Client Scala: PlayFramework 2.x, Lift, Akka, ReactiveMongo Groovy: Groovy scripts / Gant build scripts / Gradle Databases: SQL(PostgreSQL/MySQL), MongoDB, Riak, SOLR/ElasticSearch PHP scripts, linux(fedora/centos/ubuntu) server administration, SVN / Git, SEO methods/scripts, affiliate marketing. Check my blog( also.

100% Job Success
$60.00 /hr
1,026 hours

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