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Junior Java Developer Jobs in O Fallon, MO (NOW HIRING)

The Timberline Group

Java/J2EE Developer

Saint Louis, MO · On-site

$85 - $120/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

The Timberline Group

Java/J2EE Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

... JAVA applications. 2. Perform software analysis, programming, testing, debugging based on technical requirements. 3. Identify production and non-production application issues and ensure designs ...

Synthesis Systems

Full Stack Java Developer

Creve Coeur, MO · On-site

$49.25 - $63.50/hr

The Full Stack Developer provides frontend and backend development support. The successful ... JS, Java and Postgres SQL on AWS platform Overall 6+ years of Candidate experience needed Good ...

Synthesis Systems

Full Stack Java Developer

Creve Coeur, MO · On-site

$49.25 - $63.50/hr

The Full Stack Developer provides frontend and backend development support. The successful ... JS, Java and Postgres SQL on AWS platform Overall 6+ years of Candidate experience needed Good ...

The Timberline Group

Java/Angular Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

The developer will meet with clients, analyze client requirements, propose & construct solutions ... Java/ Angular, J2EE, Servlets, XML * HTML, CSS, JavaScript, JQuery * JUnit, Mockito * Apache ...

Sonsoft Inc

Java/J2EE Developer

Saint Louis, MO

$49.50 - $64.25/hr

Experience in Server side programming using Java Servlets, JSP, JDBC, JavaBeans, EJB, log4J. * Experience in development/build tools like Eclipse, RAD, Soap UI, XML Spy, ANT, SVN, CVS etc.

Collabera

Java Developer

O Fallon, MO

$47.75 - $61.75/hr

Company Description About Collabera: Established in 1991, Collabera is one of the fastest growing end-to-end information technology services and solutions companies globally. As a half a billion ...

Sonsoft Inc

Java/J2ee Developer

Saint Louis, MO

$49.50 - $64.25/hr

Experience in Server side programming using Java Servlets, JSP, JDBC, JavaBeans, EJB, log4J. * Experience in development/build tools like Eclipse, RAD, Soap UI, XML Spy, ANT, SVN, CVS etc.

Sonsoft Inc

Java/J2ee Developer

Saint Louis, MO

$49.50 - $64.25/hr

Experience in Server side programming using Java Servlets, JSP, JDBC, JavaBeans, EJB, log4J. * Experience in development/build tools like Eclipse, RAD, Soap UI, XML Spy, ANT, SVN, CVS etc.

Sonsoft Inc

Java/J2EE Developer

Saint Louis, MO

$49.50 - $64.25/hr

Experience in Server side programming using Java Servlets, JSP, JDBC, JavaBeans, EJB, log4J. * Experience in development/build tools like Eclipse, RAD, Soap UI, XML Spy, ANT, SVN, CVS etc.

kollasoft

Java/J2EE developer Sr.

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java J2EE Developer in St.Louis,MO Duration: 2-3 Years Contract Need GC or USC only Communication: Present ideas assertively, aggressively and not be easily ignored. * Be articulate, persuasive and ...

kollasoft

Java/J2EE developer Sr.

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java J2EE Developer in St.Louis,MO Duration: 2-3 Years Contract Need GC or USC only Communication: Present ideas assertively, aggressively and not be easily ignored. * Be articulate, persuasive and ...

kollasoft

Java/J2EE developer Sr.

Saint Louis, MO

$49.50 - $64.25/hr

Java J2EE Developer in St.Louis,MO Duration: 2-3 Years Contract Need GC or USC only Communication: Present ideas assertively, aggressively and not be easily ignored. * Be articulate, persuasive and ...

Sonsoft Inc

Java/J2EE Developer

Saint Louis, MO

$49.50 - $64.25/hr

Experience in Server side programming using Java Servlets, JSP, JDBC, JavaBeans, EJB, log4J. * Experience in development/build tools like Eclipse, RAD, Soap UI, XML Spy, ANT, SVN, CVS etc.

The Timberline Group

Java / J2EE Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

Strong understanding of Object Oriented Programming * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of Java ...

The Timberline Group

Java / J2EE Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

Strong understanding of Object-Oriented Programming (OOP) * Analyze and develop Java solutions based on customers' needs * The ability to develop technical documentation * Proficient knowledge of ...

Artius Solutions

Lead Java Engineer

Saint Louis, MO · On-site

$140K - $150K/yr

Mentor and support junior engineers; take part in hiring, onboarding, and technical knowledge ... Java 21 preferred): including lambda expressions, Stream API, CompletableFuture, Virtual Threads ...

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All JobsJava Developer JobsJunior Java Developer JobsJunior Java Developer Jobs in O'Fallon, MO

Junior Java Developer information

See O Fallon, MO salary details

$57K

$99.9K

$150.5K

How much do junior java developer jobs pay per year?

As of Aug 19, 2026, the average yearly pay for junior java developer in O'Fallon, MO is $99,888.00, according to ZipRecruiter salary data. Most workers in this role earn between $70,600.00 and $99,600.00 per year, depending on experience, location, and employer.

What is a junior Java developer?

Junior Java Developers are entry-level software engineers who specialize in building and maintaining applications using the Java programming language. They typically work under the supervision of more experienced developers and are responsible for writing code, debugging, and participating in code reviews. Their tasks may also include testing software, learning new frameworks, and assisting with the design and implementation of features. Junior Java Developers usually have foundational knowledge of Java and related technologies, and they are eager to develop their skills through hands-on experience.

What does a junior Java developer do?

Junior Java developers are entry-level programmers who are part of a team of coders and developers. They work on both front-end and back-end codes to build an application. Being a junior Java developer requires extensive knowledge of coding and the program language JavaScript to develop and troubleshoot products. As a junior Java developer, you run tests to pinpoint errors, migrate code and data, and ensure the program is integrated with other company developments.

What are the key skills and qualifications needed to thrive as a junior Java developer?

A Junior Java Developer should have a solid understanding of Java programming, object-oriented principles, and basic software development concepts, often supported by a relevant degree or coding bootcamp. Familiarity with tools such as IntelliJ IDEA or Eclipse, version control systems like Git, and frameworks like Spring Boot is typically expected. Strong problem-solving abilities, attention to detail, and effective teamwork are important soft skills in this role. These competencies enable efficient code development, smooth collaboration, and the ability to quickly adapt to new technologies and project requirements.

What are some common challenges a junior Java developer might face during their first year, and how can they overcome them?

Junior Java Developers often encounter challenges such as understanding large codebases, adapting to agile development processes, and managing task priorities. To overcome these hurdles, it’s helpful to proactively seek mentorship from senior developers, regularly review documentation, and participate in code reviews. Effective communication with team members also accelerates learning and helps clarify requirements or technical uncertainties. Embracing continuous learning through online resources and hands-on projects will further strengthen your skills and confidence.

What is the difference between Junior Java Developer vs Java Developer?

AspectJunior Java DeveloperJava Developer
Required Experience0-2 years2+ years
CertificationsOptional, entry-level certificationsOptional, advanced certifications
Work EnvironmentSupportive, learning-focused teamsProject-driven, independent roles
ResponsibilitiesAssist in coding, bug fixing, learning frameworksDesign, develop, maintain Java applications

The main difference between a Junior Java Developer and a Java Developer lies in experience, responsibilities, and independence. Junior Java Developers are typically entry-level, focusing on learning and supporting tasks, while Java Developers have more experience and handle complex development projects independently.

How much do junior Java developers make?

Junior Java developers typically earn between $50,000 and $80,000 annually, depending on location, industry, and experience. Entry-level roles often require knowledge of Java, object-oriented programming, and development tools like Eclipse or IntelliJ IDEA.

Is a Junior Java Developer still in demand?

Junior Java Developers remain in demand due to the widespread use of Java in enterprise applications, web development, and Android app creation. Employers seek candidates with foundational Java skills, knowledge of frameworks like Spring, and familiarity with version control tools such as Git. Continuous learning and certifications can enhance job prospects in this field.
More about Junior Java Developer jobs

What are the most commonly searched types of Java Developer jobs in O'Fallon, MO?

The most popular types of Java Developer jobs in O'Fallon, MO are:

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For Junior Java Developer jobs in O'Fallon, MO, the most frequently searched job titles are:

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What cities near O'Fallon, MO are hiring for Junior Java Developer jobs?

Cities near O'Fallon, MO with the most Junior Java Developer job openings:

Junior Java Developer jobs near you
Infographic showing various Junior Java Developer job openings in O'Fallon, MO as of August 2026, with employment types broken down into 79% Full Time, 8% Part Time, and 13% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $99,888 per year, or $48 per hour.

Java/J2EE Developer

The Timberline Group

Saint Louis, MO • On-site

$85 - $120/hr

Other

Medical, Dental, Vision, PTO

Re-posted 24 days ago

Job description

We strive to keep learning and using the latest technologies from mobile (all platforms) to cloud (Azure) to big data (Hadoop/Cassandra) to IoT. You would work with a team of talented individuals who share a strong passion for problem solving and software. You will be developing application solutions through the complete SDLC in a fun, challenging, and casual environment

Qualifications
  • 3+ years of development experience in JAVA/J2EE
  • Strong understanding of Object Oriented Programming
  • Analyze and develop Java solutions based on customers’ needs
  • The ability to develop technical documentation
  • Proficient knowledge of Java & J2EE (including JSP, EJB, JDBC, SQL, XML, HTML and associated technologies) and the use of those technologies in n-tier development environments
  • Proficient knowledge is also expected in object-oriented application development principles, theories, and concepts using J2EE specific design patterns and usage
  • Web Services (RestFul & SOAP)
  • Experience with the use of version control systems for code management such as GIT, SVN, CVS
  • Ability to work on your own or with a team
  • Adaptability, organized, and a strong work ethic.
Nice to haves

We strive to keep learning and using the latest technologies from mobile (all platforms) to cloud (Azure) to big data (Hadoop/Cassandra) to IoT. You would work with a team of talented individuals who share a strong passion for problem solving and software. You will be developing application solutions through the complete SDLC in a fun, challenging, and casual environment

Qualifications
  • BA/BS degree
  • 3+ years of development experience in JAVA/J2EE
  • Strong understanding of Object Oriented Programming
  • Analyze and develop Java solutions based on customers’ needs
  • The ability to develop technical documentation
  • Proficient knowledge of Java & J2EE (including JSP, EJB, JDBC, SQL, XML, HTML and associated technologies) and the use of those technologies in n-tier development environments
  • Proficient knowledge is also expected in object-oriented application development principles, theories, and concepts using J2EE specific design patterns and usage
  • Web Services (RestFul & SOAP)
  • Experience with the use of version control systems for code management such as GIT, SVN, CVS
  • Ability to work on your own or with a team
  • Adaptability, organized, and a strong work ethic.
Nice to haves
  • XML / JSON / HTML / Oracle DB / JavaScript / Angular
What can we offer?
  • 100% premium-paid medical insurance for employee-only-coverage
  • 100% premium-paid dental insurance for employee-only-coverage
  • 100% premium-paid vision insurancefor employee-only-coverage
  • Premium assistance for dependent medical/dental/vision insurance
  • Paid Time Off (PTO)
  • Paid Holidays
  • Educational assistance, some certifications and professional memberships paid
  • Professional Referral Program
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