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Junior Java Programmer Jobs in Ballwin, MO (NOW HIRING)

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

... junior team members, and performing code reviews. This is a vital role responsible for planning ... JAVA JDK 11-17, Spring Boot, Spring Security, Maven, Hibernate / JPA, REST, and SQL Server or other ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

... junior team members, and performing code reviews. This is a vital role responsible for planning ... JAVA JDK 11-17, Spring Boot, Spring Security, Maven, Hibernate / JPA, REST, and SQL Server or other ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

... Java and Spring Boot, focusing on performance, scalability, and reliability • Translate ... junior engineers and support knowledge sharing across the team • Contribute to a culture of ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

... using Java and Spring Boot, focusing on performance, scalability, and reliability Translate ... junior engineers and support knowledge sharing across the team Contribute to a culture of ...

Bayer

Senior Software Engineer

Saint Louis, MO · On-site

$104K - $156K/yr

Participate in code reviews, provide constructive feedback, and mentor junior engineers to foster a ... Proficiency in at least one modern backend programming language (e.g., Java, Python) * Experience ...

Bayer

Senior Software Engineer

Creve Coeur, MO · On-site +1

$104K - $156K/yr

Participate in code reviews, provide constructive feedback, and mentor junior engineers to foster a ... Java, Python) Experience with relational and non-relational data stores including hands on ...

MasterCard

Senior Software Engineer Big Data

O Fallon, MO · On-site

$114K - $151K/yr

... junior team members, and performing code reviews. This is a vital role responsible for planning ... Core JAVA, Spring Integration, Spring Boot, Hibernate, REST/SOAP web services). • Proven ...

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All JobsJunior Java Programmer JobsJunior Java Programmer Jobs in Ballwin, MO

Junior Java Programmer information

See Ballwin, MO salary details

$59.3K

$103.9K

$156.6K

How much do junior java programmer jobs pay per year?

As of Jun 23, 2026, the average yearly pay for junior java programmer in Ballwin, MO is $103,878.00, according to ZipRecruiter salary data. Most workers in this role earn between $73,400.00 and $103,600.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Junior Java Programmer, and why are they important?

To thrive as a Junior Java Programmer, you need a solid understanding of Java programming, object-oriented concepts, and a relevant degree or coursework in computer science. Familiarity with development environments like Eclipse or IntelliJ IDEA, version control systems such as Git, and basic knowledge of databases are typically required. Strong problem-solving skills, attention to detail, and the ability to communicate effectively within a team are important soft skills. These competencies are crucial for delivering clean, maintainable code and collaborating efficiently on software projects.

What are Junior Java Programmers?

Junior Java Programmers are entry-level software developers who specialize in writing, testing, and maintaining code using the Java programming language. They typically work under the supervision of more experienced developers and assist in developing applications, debugging issues, and learning best practices in software development. Their responsibilities often include understanding project requirements, writing clean code, and collaborating with team members to deliver high-quality software solutions. This role is ideal for individuals who have foundational knowledge of Java and are looking to gain professional experience in the field.

What types of projects or tasks can a Junior Java Programmer expect to work on in their first year?

As a Junior Java Programmer, you can expect to work on a variety of tasks such as debugging existing code, writing unit tests, developing small features, and assisting with backend development on larger projects. You'll often collaborate closely with senior developers and participate in code reviews to learn best practices. Many organizations assign juniors to maintenance tasks or simpler modules at first, gradually increasing responsibility as you build confidence and technical skills. This hands-on experience is invaluable for understanding software development workflows and improving your coding abilities.

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

AspectJunior Java ProgrammerJava Developer
Required CredentialsBasic Java certifications, some programming experienceAdvanced Java certifications, multiple years of experience
Work EnvironmentEntry-level projects, supervised tasksDesign, develop, and maintain complex applications
Employer & Industry UsageTech companies, startups, IT departmentsSoftware firms, enterprise solutions, large-scale projects

While Junior Java Programmers focus on learning and executing basic Java tasks under supervision, Java Developers handle more complex development responsibilities, including designing and implementing software solutions. The roles differ mainly in experience level and scope of work, but both require a solid understanding of Java programming.

Junior Java Programmer jobs near you
Infographic showing various Junior Java Programmer job openings in Ballwin, MO as of June 2026, with employment types broken down into 1% Internship, 69% Full Time, 8% Part Time, 5% Temporary, 16% Contract, and 1% Nights. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution, with an average salary of $103,878 per year, or $49.9 per hour.

Senior Test Systems Engineer 112-204 with Security Clearance

IC-CAP

Saint Louis, MO • On-site

$101K - $139K/yr

Other

Posted 26 days ago

Job description

Senior-level Test Systems Engineers assist in leading Application, System and Integration Testing teams performing test and evaluation across the National System of Geospatial-intelligence (NSG), Allied System of Geospatial-intelligence (ASG) and Federal Agencies to ensure timely and accurate GEOINT. Duties may include: * Guides Mid-level and Junior-level system engineers performing test and evaluation across the National System of Geospatial-intelligence (NSG), Allied System of Geospatial-intelligence (ASG) and Federal Agencies. * Performs testing of applications and application programming interfaces (APIs) in DevOps pipelines utilizing quality assurance measures established by the government and industry best practices.

* Performs independent integration testing on the system software or hardware to determine the system's compliance with specified requirements. * Plans and executes manual tests, and automated test scripts using scripting and programming languages. * Supports technical investigations for defects discovered during test activities.

Education and Experience Required: * Bachelor's degree or higher in Engineering, Computer Science, Information Technology, Management Information Systems, or related STEM degree program, or 12+ years of experience as a Test Systems Engineer. * 12+ years of experience with test management and defect tracking tools. * Experience with three or more of the following; JMeterand, Jenkins, Docker, Postman, Swagger, Nexus, Apigee or GitHub/GitLab (or equivalent software packages), Java, Bash, Curl, XML, JSON, SQL, Python, Javascript, and AWS and C2S.

* Experience with traditional, Agile, and DevOps development practices and associated testing strategies. Desired: * Master's degree in Computer Science, Information Technology, Management Information Systems, or related STEM degree program. * Working knowledge of Model Based Systems Engineering, processes, tools and languages.

* Working knowledge of Software Development Frameworks. Security Clearance: * Active TS/SCI clearance and the willingness to sit for a CI polygraph, if needed IC-CAP provides equal employment opportunities (EEO) to all applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status.

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