Find the Best Java Development Jobs

Professionals on Upwork rate clients
Rating is 4.9 out of 5.
4.9/5
On average from 2M+ reviews

Check out a sample of the 1,107 Java Development jobs posted on Upwork

30+ hrs/week
Hours needed
1 to 3 months
Duration
Expert
Experience level

We're ecomAIOS, a done-for-you AI Operating System for 7-figure ecom brands. We install a custom AIOS on the client's own infrastructu…

Java DevelopmentOAuthPython
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Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Expert
Experience level

We are seeking a skilled Windows Application Developer to create a lightweight desktop applet for medical research calculations. The ap…

Java DevelopmentData EntrySASJava Jobs
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Kotlin APP Development

Hourly ‐ Posted 1 day ago
30+ hrs/week
Hours needed
More than 6 months
Duration
Entry
Experience level

Our Kotlin-based CRM app already records and attaches sales calls to the correct lead cards without a hiccup on Samsung and Xiaomi devi…

Java DevelopmentKotlinAndroidJava JobsMobile App Development
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$25
Fixed-price
Intermediate
Experience level

I’m looking for a WordPress developer to help update my website with a child theme, footer design, & site speed optimization. ** What…

Java DevelopmentCSSHTMLHTML5JavaScriptMySQLPHPJava Jobs
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30+ hrs/week
Hours needed
More than 6 months
Duration
Expert
Experience level

We operate a multi-tenant consumer ordering platform for large enterprise restaurant brands. The core stack is ~44 TypeScript microserv…

Java DevelopmentJestGitHubAWS LambdaNode.js
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Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level

We are seeking an experienced backend developer to create a crypto game backend using React. The ideal candidate will have a strong und…

Java DevelopmentNode.jsMobile App DevelopmentiOS DevelopmentJavaScriptMongoDBC#
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Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Expert
Experience level

We are looking for a Mainframe-to-.NET modernization consultant with hands-on experience using AI tools such as Claude, Gemini, ChatGPT…

Java DevelopmentCOBOLC#
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Trading System Development

Fixed-price ‐ Posted 2 days ago
$20
Fixed-price
Intermediate
Experience level

Develop a trading system with a Renko EMA(6) strategy for signal generation. Create an execution engine to receive signals and decide o…

Java DevelopmentCForex TradingC++Java Jobs
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$200
Fixed-price
Intermediate
Experience level

I need to develop an inventory software from a given reference with basic additional features. The project involves enhancing the exist…

Java DevelopmentMySQL ProgrammingJava JobsMySQLPHP
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Web Developer

Fixed-price ‐ Posted 1 day ago
$600
Fixed-price
Expert
Experience level

We are seeking a highly skilled and innovative Web Developer to join our dynamic team. The ideal candidate will be responsible for desi…

Java DevelopmentDatabase ProgrammingDatabase DesignDatabase AdministrationWebsiteDatabase ArchitectureAPI IntegrationMySQL
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Java Developers on Upwork
can earn $20–$40/hr.
Learn more below about how you can earn a career on the world’s work marketplace.
Java Developer average prices bell curve

$20$40

Median hourly rates (USD)

How to Become a Freelance Java Developer

Java is considered one of the best programming languages for enterprise software. What’s more,Java is one of the native programming languages supported by Android, so many mobile app developers use Java.

What does a Java developer do?

Java developers are responsible for architecting, designing, and developing software using Java, and many popular software libraries and frameworks are written in Java, such as Spring and Hibernate.

Java programmers and developers typically work as part of a team to design and develop software solutions for client requests. Java is famous as an embedded systems programming language, so many devices are powered using software written in Java.

Some other roles and responsibilities include:

  • Designing, implementing, and maintaining Java applications
  • Delivering applications with high availability and performance
  • Ensuring designs comply with specifications

What skills do I need to become a Java developer?

To become a Java developer, experience is more important than a college degree, but a bachelor’s degree in computer science, software engineering, and another related field is often recommended.

Java developers must understand programming concepts such as object-oriented design and common frameworks and software libraries written in Java. Java developers will also be familiar with typical programming tools such as IDEs and version control software.

Common skills a Java developer should possess include:

  • In-depth knowledge of OO design and programming
  • Excellent analytical, problem-solving, and troubleshooting skills
  • Knowledge of relational databases (Oracle, SQL Server, DB2)
  • Experience with back-end application programming interfaces (APIs)

What are the job responsibilities of a Java developer?

A Java developer will build and maintain software applications to develop web apps, mobile apps, embedded system apps, server-side software, and more.

Typically, a Java developer will work as part of a team, using IDEs to write code and version control software to commit code as part of a team effort. A Java developer will be expected to:

  • Plan, design, and code software solutions for new and existing projects
  • Write efficient and reusable code
  • Develop software using industry best practices
  • Work with software engineers, product managers, software developers, web developers, and clients to ensure the software is designed well and meets user needs

Eager to learn more about Java development on Upwork? Check out these additional resources:

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this section. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyse and determine the tools or services that would best fit their specific needs and situation.

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