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Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level
We are seeking a skilled developer to integrate Solana blockchain technology into our existing platform, enabling a seamless pay-to-pla…
30+ hrs/week
Hours needed
More than 6 months
Duration
Intermediate
Experience level
need assistance with deploying a Ktor application. Your responsibilities will include: Setting up the environment Configuring server se…
30+ hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level
We are seeking an experienced consultant to assist in selecting and integrating effective business software and applications across var…
Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level
We are seeking a skilled mobile app developer to create a user-friendly mobile application that includes backend functionality. The ide…
US$1,000
Fixed-price
Expert
Experience level
We are seeking an experienced developer (or team) to build a robust system for collecting customer data, processing payments, generatin…
Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Intermediate
Experience level
I am seeking an experienced Kotlin developer from Europe to assist with the remote setup and troubleshooting of my Kotlin project. The…
US$26,400
Fixed-price
Intermediate
Experience level
We are seeking an experienced ServiceNow Consultant to assist us in optimizing our ServiceNow instance and enhancing our workflows. The…
US$8
Fixed-price
Entry
Experience level
Shopify Store Developer Needed to fix minor issues We are looking for a skilled Shopify developer to fix our ecommerce website issues.…
US$60
Fixed-price
Intermediate
Experience level
We are looking for a skilled professional to create a fillable PDF file and an .odg file from a provided template PDF. The project invo…
Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Expert
Experience level
development onsite checkout leadership Lead development team for onsite checkout on onsite checkout with ottu.
can earn US$20–US$40/hr.
US$20 US$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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