Find the Best Java Development Jobs
Check out a sample of the 1,004 Java Development jobs posted on Upwork
Java Spring Boot Developer
Hourly ‐ Posted 1 day agoHours needed
Duration
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…
NetSuite OAuth 2.0 Integration Fix — "role does not support OAuth2 login" (SuiteCloud/REST)
Fixed-price ‐ Posted 1 day agoFixed-price
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…
Penetration Test - Network and Web Apps
Fixed-price ‐ Posted 1 day agoFixed-price
Experience level
Proposal for annual Pen Testing: Environment A Network Penetration Testing (External + Internal) Up to 150 total external IP address…
App Store & Google Play submission specialist for existing web app (no rebuild)
Hourly ‐ Posted 1 day agoHours needed
Duration
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…
Lovable Website Help Needed
Hourly ‐ Posted 1 day agoHours needed
Duration
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…
Experienced Technical Recruiter Needed
Fixed-price ‐ Posted 1 day agoFixed-price
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…
Software Developer: Technical Presentation and Collaboration Project
Hourly ‐ Posted 1 day agoHours needed
Duration
Experience level
We are seeking a US or Canada-based Software Developer (Native English speaker with 1+ years of development experience) for an ongoing,…
Modernize Training for Action Certification Program
Fixed-price ‐ Posted 1 day agoFixed-price
Experience level
This project focuses on modernizing the "Training for Action: Prepare & Facilitate" certification program, a train-the-trainer initiati…
AI-Assisted Trading System Developer
Hourly ‐ Posted 1 day agoHours needed
Duration
Experience level
Seeking an experienced developer to create an AI-assisted trading system. The project involves integrating TradingView charts, Pine Scr…
Founding Ai Product Architect (Expert level onyl)
Hourly ‐ Posted 1 day agoHours needed
Duration
Experience level
Founding AI Product Architect (Expert Level) Build a Category-Defining AI Product We're building a proprietary AI product that will be…
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
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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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