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$5
Fixed-price
Intermediate
Experience level
We are seeking a skilled developer to integrate Firebase Crashlytics into our existing Chrome Extension. This project requires a profic…
$200
Fixed-price
Expert
Experience level
I have a VPN application built in Java. I am looking for professional services to (1) fix the app issue based on Crashlytics (2) fix t…
Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Intermediate
Experience level
We are looking for an experienced engineer who can assist us in clearing the GEN AI PROMPT Engineering assessment and the Writing code-…
$130
Fixed-price
Intermediate
Experience level
We are looking for a skilled Full Stack Developer to join our team and work on developing an Order-to-Cash (O2C) application. Job Titl…
$100
Fixed-price
Intermediate
Experience level
I will be building a custom Web Database App on a Raspberry Pi I would like to include a Zebra or Argox label printer to print labels w…
$5
Fixed-price
Intermediate
Experience level
Hey there, Chrome Wizards! Are you ready to tackle a fun challenge? We’re on the lookout for a talented Chrome Extension Developer who…
Less than 30 hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level
My son just passed AP Computer Science. I want to set him up with a Summer project. The goal is to use No Code (Zapier,) Gen AI (OpenAI…
Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Expert
Experience level
We are looking for a skilled professional to open a thousand instances of an Android application from a computer and perform the same o…
$50
Fixed-price
Intermediate
Experience level
I need an expert for Google chrome extention development. This is a very small project. This extention is linked with gmail using api.…
$400
Fixed-price
Intermediate
Experience level
We are looking for an experienced developer to create a POS stock app that will work on Android, iOS, and web platforms. This app shoul…
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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