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Internship Java Software Engineer Jobs in St Louis, MO

The Giant Bullseye

Senior Java Engineer

Saint Louis, MO · On-site

$55.75 - $71/hr

Overview We are looking for a highly skilled Senior Java Engineer to design, develop, and maintain ... quality software solutions * Participate in code reviews, performance optimization, and ...

Equifax, Inc.

Senior Software Engineer

Saint Louis, MO · On-site

$119K - $157K/yr

Bachelor's degree or equivalent experience * 5+ years of software engineering experience * 5+ years experience writing, debugging, and troubleshooting code in mainstream Java, SpringBoot, TypeScript ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Build and own Java services and APIs that deliver AI-powered features, ensuring performance ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

MasterCard

Lead Software Engineer

O Fallon, MO · On-site

Lead software development efforts using Java, Spring Boot, and work with Oracle databases for ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

We are looking for a Senior AI Java Engineer (Hands-on IC) to deliver AI-driven capabilities across ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

Mastercard, Inc.

Lead Software Engineer

O Fallon, MO · On-site

... software development efforts using Java, Spring Boot, and work with Oracle databases for ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

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Internship Java Software Engineer information

See St Louis, MO salary details

$25

$58

$82

How much do internship java software engineer jobs pay per hour?

As of Jul 9, 2026, the average hourly pay for internship java software engineer in St. Louis, MO is $58.75, according to ZipRecruiter salary data. Most workers in this role earn between $48.37 and $66.39 per hour, depending on experience, location, and employer.

What does an Internship Java Software Engineer do?

An Internship Java Software Engineer assists in designing, developing, and testing software applications using the Java programming language. Interns typically work under the supervision of experienced engineers to write code, debug issues, and contribute to software projects. They may also participate in code reviews, collaborate with team members, and learn industry best practices. This role provides hands-on experience and exposure to real-world software development processes, preparing interns for future roles as professional software engineers.

What kinds of projects and tasks can an Internship Java Software Engineer expect to work on during their internship?

As an Internship Java Software Engineer, you can expect to work on a variety of hands-on tasks such as developing, testing, and debugging Java-based applications under the guidance of senior engineers. You might assist in implementing new features, fixing bugs, or optimizing existing code. Interns often participate in code reviews, daily stand-up meetings, and collaborative team projects, giving you exposure to real-world software development workflows. This experience not only builds your technical skills but also helps you learn best practices and agile methodologies commonly used in the industry.

What are the key skills and qualifications needed to thrive as an Internship Java Software Engineer, and why are they important?

To thrive as an Internship Java Software Engineer, you need a solid grasp of Java programming, object-oriented design principles, and basic software development concepts, often supported by ongoing coursework in computer science or a related field. Familiarity with development tools such as Eclipse or IntelliJ IDEA, version control systems like Git, and basic understanding of databases is typically expected. Strong problem-solving skills, willingness to learn, and effective teamwork and communication abilities help you stand out in this role. These skills and qualities are crucial for successfully contributing to real-world projects, collaborating with teams, and rapidly building your technical expertise.
What are the most commonly searched types of Java Software Engineer jobs in St. Louis, MO? The most popular types of Java Software Engineer jobs in St. Louis, MO are:
What cities near St. Louis, MO are hiring for Internship Java Software Engineer jobs? Cities near St. Louis, MO with the most Internship Java Software Engineer job openings:
Internship Java Software Engineer jobs near you

Junior Software Engineer

Freedom Technology Solutions Group

Saint Louis, MO • Hybrid

Other

Posted 16 days ago

Job description

Freedom Technology Solutions Group is seeking a Software Engineer to support our client's intelligence analysis products and capabilities. This position involves providing software development capabilities to enhance existing and emerging client capabilities, including design and development, modernization of existing applications and services, and operations and sustainment. The role focuses on driving the client's adaptation of higher levels of automation and operational efficiency through agile development methodologies, rapid prototyping, and modern technology stacks. 

The Junior Software Developer applies expertise to multiple development assignments. This role requires originality in developing solutions and provides latitude in designing methodologies and approaches. 

Responsibilities:

  • Design, develop, and enhance backend services using Java, JavaScript, and Python. 
  • Build and maintain secure, automated DevSecOps pipelines for CI/CD.
  • Lead containerized solution deployments across hybrid and cloud (AWS) environments.
  • Implement and optimize geospatial data processing and API integrations.
  • Troubleshoot, debug, and improve system performance.
  • Review code contributions.
  • Contribute to system architecture discussions and recommend improvements.
  • Provide input on deliverables, schedules, and performance metrics.
  • Participate in rapid prototyping to quickly iterate and improve solutions
  • Utilize modern technology stacks to meet client needs
  • Implement CI/CD pipelines using GitLab
  • Collaborate with cross-functional teams to deliver high-quality software solutions 

Key Technologies:

  • Linux
  • Java, JavaScript, Python
  • Containerization (Docker, OpenShift, Kubernetes, ...)
  • AWS Services
  • GitLab
  • Apache Spark, Glue, and other ETL processes/procedures
  • Data Types: Structured and Unstructured, Parquet, JSON, XML, etc. 

Required Qualifications:

  • Active TS/SCI clearance (eligible for CI Poly).
  • 0-3 years software development experience.
  • Proficiency in Java, JavaScript, and Python.
  • Experience with DevSecOps pipelines, Agile methodologies, and CI/CD tools (e.g., GitLab).
  • Hands-on experience with AWS services (Lambda, ECS, S3, RDS, etc.).
  • Skilled in containerization technologies (Docker, Kubernetes, OpenShift).
  • Experience with geospatial data frameworks and APIs (e.g., GeoServer, PostGIS, ArcGIS).
  • Using GitLab for code source repository and using GitLab CI/CD
  • Developing customized code, scripts, modules, macro procedures, or libraries for specialized spatial analysis functions using languages such as Python, Java, JavaScript, PHP, C, C++, C#, Perl, or similar 

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