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$500
Fixed-price
Entry
Experience level
https://github.com/PyojinKim/ios_logger https://github.com/DavidGillsjo/VideoIMUCapture-Android I want to use data collected from the…
$360
Fixed-price
Expert
Experience level
We are looking for the candidate having more than 7 years of experience in below technologies Skills : Java, groovy, Linux/ shell scri…
Hours to be determined
Hours needed
1 to 3 months
Duration
Intermediate
Experience level
We are seeking a skilled Java developer from India with expertise in core Java for desktop application development. The ideal candidate…
$10
Fixed-price
Expert
Experience level
Integration Ml FLow with Okta using python and sql. Dont copy paste from Chat Gpt. Need this working. If you are able to do, in few wee…
$50
Fixed-price
Intermediate
Experience level
We are looking for an experienced Android developer to fix a video bug in our app that uses Agora SDK. The bug is related to video play…
30+ hrs/week
Hours needed
1 to 3 months
Duration
Intermediate
Experience level
We are seeking a skilled developer to build a Course Builder Studio specifically designed for educators. The main goal of this project…
$10
Fixed-price
Expert
Experience level
Issue found: Violation of User Data policy We reviewed SDKs used by your app and found noncompliant version(s) of SDK(s) which collects…
$5
Fixed-price
Expert
Experience level
Hi, I have upload 2 extensions and received an error. I will give you code. You should fix the error and advice me to fix it. Error E…
$13,000
Fixed-price
Intermediate
Experience level
We have achieved stable returns through capital rate arbitrage, and now we need to improve accuracy and arbitrage speed through program…
$263
Fixed-price
Intermediate
Experience level
We are looking for a Candidate having more than 5 years of experience in below technologies Skills: Java Angular Budget: 22k/monthly…
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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