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 1,004 Java Development jobs posted on Upwork

Java Spring Boot Developer

Hourly ‐ Posted 1 day ago
Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level

We are seeking an experienced Java Spring Boot developer with a minimum of 6-8 years of experience. The candidate should be willing to…

Java DevelopmentJakarta EEJava Jobs
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$150
Fixed-price
Intermediate
Experience level

We're trying to connect a third-party app (Claude AI) to our NetSuite account using the OAuth 2.0 authorization code grant flow. Author…

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Penetration Test - Network and Web Apps

Fixed-price ‐ Posted 1 day ago
$20,000
Fixed-price
Expert
Experience level

Proposal for annual Pen Testing: Environment A Network Penetration Testing (External + Internal) Up to 150 total external IP address…

Java DevelopmentEthical HackingSecurity AnalysisPenetration Testing
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Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Expert
Experience level

I have a fully working web app and I need someone who lives in App Store Connect and Google Play Console to handle getting it into both…

Java DevelopmentAdaptive Web DesignMobile App DevelopmentHTMLAndroidiOS
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Lovable Website Help Needed

Hourly ‐ Posted 1 day ago
Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Intermediate
Experience level

We are seeking a skilled coder to troubleshoot and fix glitches in a custom-built Lovable program made by Claude. The candidate will b…

Java DevelopmentClaudeJava JobsPHPJavaScript
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Experienced Technical Recruiter Needed

Fixed-price ‐ Posted 1 day ago
$100
Fixed-price
Intermediate
Experience level

We are looking for an experienced Technical Recruiter to take full ownership of our hiring process and help us build a high-performing…

Java DevelopmentSoftware TestingAgile Software DevelopmentHuman Resource ManagementRecruiting
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Less than 30 hrs/week
Hours needed
3 to 6 months
Duration
Expert
Experience level

We are seeking a US or Canada-based Software Developer (Native English speaker with 1+ years of development experience) for an ongoing,…

Java DevelopmentEnglish
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$1,000
Fixed-price
Intermediate
Experience level

This project focuses on modernizing the "Training for Action: Prepare & Facilitate" certification program, a train-the-trainer initiati…

Java DevelopmentPHPC#Java Jobs
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AI-Assisted Trading System Developer

Hourly ‐ Posted 1 day ago
Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level

Seeking an experienced developer to create an AI-assisted trading system. The project involves integrating TradingView charts, Pine Scr…

Java DevelopmentAlgorithm DevelopmentAPIPythonCForex TradingC++Java Jobs
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30+ hrs/week
Hours needed
1 to 3 months
Duration
Expert
Experience level

Founding AI Product Architect (Expert Level) Build a Category-Defining AI Product We're building a proprietary AI product that will be…

Java DevelopmentAI Model IntegrationModel DeploymentModel Testing & OptimizationJava Jobs
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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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