Find the Best Java Development Jobs
Check out a sample of the 1,113 Java Development jobs posted on Upwork
Develop a copilot studio agent
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
Working a copilot studio agent creation to extract emails..more details will be provided upon call.
Japanese QA Tester for AI Android App
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
Looking for a native or fluent Japanese speaker based in Japan to QA test an AI-powered Android app. The app can operate other apps on…
AI-Assisted Full-Stack Developer for No-Code Projects
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
I need an experienced AI-assisted full-stack developer to take on a steady stream of web and app projects, often converting no-code pro…
AI Native Website Development
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
Seeking a Senior Full-Stack + AI Integration Lead to build an AI native website. The ideal candidate will have expertise in backend dev…
QA Tester for AI Android App
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
Looking for someone with good experience to QA test an AI-powered Android app. The app can operate other apps on your behalf, like book…
Senior Supabase Authentication & Customer Portal Developer
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
We are looking for a highly experienced Supabase developer to audit, troubleshoot, and optimize our production customer portal and memb…
Full Stack App Engineer
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
We are seeking an expert full stack app and be a project manager for a development of a marketplace app with over 10 years of experienc…
Seeking a Full-Stack Developer
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
Seeking a Full-Stack Developer to build a simple lead capture application with a responsive form (Name, Email, Phone, Message), backend…
Basic AI solution for a PDF viewer
Fixed-price ‐ Posted 2 days agoFixed-price
Experience level
I am working on a system using AI to review and respond on Google Drive (Shared Drive) folders of PDF's. Using Gemini as a POC I get r…
Extra Chef for Toast POS System
Hourly ‐ Posted 2 days agoHours needed
Duration
Experience level
We are seeking an extra chef who understands data and its application with Toast POS systems. The ideal candidate will have experience…
can earn $20–$40/hr.
$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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