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Internship Java Software Engineer Jobs in St Louis, MO

Highbrow LLC

Lead Java Engineer

Saint Louis, MO · On-site

$100 - $130/hr

Lead Java Engineer Job ID: 2024-12812 Job Location: Morris Plains, NJ (Preferred), Austin TX, St. Louis MO, or Tampa FL Job Travel Location(s): # Positions: 1 Employment Type: W2 Duration:Long Term # ...

New

MasterCard

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Strong technical experience with Java, Java/J2EE, Linux, Oracle, and SQL programming. Strong ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

Mastercard, Inc.

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... Java, Java/J2EE, Linux, Oracle, and SQL programming. • Strong knowledge of Java, Spring Boot ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

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, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

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

Senior Software Engineer- RPPS Platform

O Fallon, MO · Remote

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

The position requires strong expertise in Java, Spring Boot, API development, and modern front-end ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Proven experience with backend development with JAVA required Familiarity with Spring Boot ... Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty ...

Geodatait

Senior Software Engineer

Saint Louis, MO · On-site

$100 - $130/hr

  • Medical

  • Life

  • Retirement

  • PTO

... Java, Web services, Database, and micro-service development software, engineering/development, or a related area that demonstrates the ability to successfully perform the duties associated with this ...

Jobsbridge

Sr. Java Developer

Saint Louis, MO

$55.75 - $71/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers ... Experience building software in a continuous integration environment like Jenkins or any other ...

Jobsbridge

Sr. Java Developer

Saint Louis, MO

$55.75 - $71/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers ... Experience building software in a continuous integration environment like Jenkins or any other ...

Geodatait

Mid Level Software Engineer

Saint Louis, MO · On-site

$80 - $100/hr

  • Medical

  • Life

  • Retirement

  • PTO

... Java, Web services, Database, and micro-service development software, engineering/development, or a related area that demonstrates the ability to successfully perform the duties associated with this ...

Jobsbridge

Sr. Java Developer

Saint Louis, MO

$55.75 - $71/hr

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers ... Experience building software in a continuous integration environment like Jenkins or any other ...

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Internship Java Software Engineer information

See St Louis, MO salary details

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

As of Aug 20, 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

Software Engineer

Reinventing Geospatial, Inc. (RGi)

Saint Louis, MO

Full-time

Re-posted 24 days ago

Job description

Reinventing Geospatial (RGi) is a leading expert in geospatial solutions for Defense, Intelligence, and Federal clients. We enhance situational awareness for soldiers and analysts by integrating software development with geospatial intelligence. Our projects range from data collection to advanced deep learning, leveraging tools like Python, Java, and ArcGIS.
 
We don't just fill roles we build teams of high performers and leaders who make an immediate impact. At our core, we're driven by innovation and powered by people who work at the intersection of passion and performance. Here, you'll collaborate with bold thinkers, leverage cutting edge technology, and tackle meaningful challenges from day one.
 
Our culture is defined and anchored by three pillars:
 
Energy: We bring passion, purpose, and urgency to our work.
Edge: We take initiative, embrace growth, and step outside our comfort zone.
Execution: We get things done smartly, decisively, and with real results.
 
If you're the kind of person who leads with initiative, thrives in a fast-paced environment, and is eager to create real impact, we want you on our team.
 
Clearance:
Active Top Secret clearance with an ability to obtain SCI access and willingness to obtain CI Polygraph
US Citizenship Required 
 
*This job posting is for a potential upcoming opening, and we encourage interested candidates to apply for future consideration.
As a Software Engineer, you will...
  • Lead full-stack software development of enterprise applications and services supporting our customer’s GEOINT mission.
  • Design and implement secure, scalable microservices in cloud environments such as AWS GovCloud or C2S.
  • Guide and mentor junior and mid-level engineers, enforce code quality, and lead peer reviews.
  • Build and deploy applications using DevSecOps pipelines, container orchestration, and Infrastructure-as-Code tools.
  • Collaborate with cross-functional teams including analysts, UI/UX designers, DevOps engineers, and product owners.
  • Translate mission requirements into technical implementations that meet security, performance, and scalability needs.
  • Ensure compliance with our customer and IC cybersecurity and accreditation standards (e.g., RMF, STIGs).
Software Engineer Qualifications...
  • Bachelor's degree in Computer Science, Software Engineering, or related field and 6+ years experience.
  • Strong proficiency with: HTML, CSS, JSON, Ajax, and REST APIs
  • Object-oriented Programming: Python, Java, or JavaScript and Go
  • Front-end and Back-end Frameworks: React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, or Svelte.
  • A strong working knowledge of: AWS, Azure, or similar cloud platforms, MySQL, PostgreSQL, or SQL Server
  • Hands on experience with: Windows, Linux, Git
  • Deep understanding of modern software design patterns and coding standards.
  • Experience architecting, developing, and delivering complex software systems into production.
  • Hands on experience developing containerized applications with Docker and Kubernetes.
  • Experience deploying to and developing in classified cloud environments (e.g., C2S, AWS GovCloud).
  • Familiarity with DevSecOps tools and practices (e.g., GitLab CI/CD, Jenkins, SonarQube, Nexus, Terraform).
  • Solid understanding of Agile methodologies and secure software lifecycle principles.
  • Strong, self-motivated desire to learn new programming languages, tools, frameworks, and techniques.
Additional Skills We'd Like to See:
  • Frontend Web Development: UI/UX
  • NoSQL Database: OpenSearch/Elasticsearch.
  • Cloud Exposure: AWS, IBM, Google, Azure, and Oracle and S3, SQS, SNS, EC2, CloudFormation and RDS.
  • Knowledge of geospatial data formats, tools, and standards (e.g., OGC, GeoServer, PostGIS, ESRI).
  • Experience with IC enterprise environments and tools (e.g., Keycloak, Vault, CloudFormation)
  • Certifications such as AWS Certified Developer, CISSP, Security+, SAFe Agile or similar.
Who we are:
Reinventing Geospatial, Inc. (RGi) is a fast-paced small business that has the environment and culture of a start-up, with the stability and benefits of a well-established firm. We solve complex problems within geospatial software development and national defense to make an Immediate Impact for our nation’s soldiers and analysts.

We pride ourselves on giving employees an exceptional life experience, where creativity thrives, and challenges are simply part of the fun. We provide truly excellent benefits, including:

·        100% paid employee healthcare & dental insurance
·        Paid parental leave
·        401k with matching
·        Escalating vacation time
·        Referral bonuses
·        Tuition reimbursement
·        Professional development training
·        Free beverages and snacks
·        Weekly catered lunches and breakfast on Fridays
 
Grow to be our next leader:
At RGi, fostering a strong and organic corporate culture is paramount and serves as a compass on the decisions we make and how we operate the company. We believe our culture of camaraderie, innovation, and collaboration reflects the caliber of our employees and their dedication to the mission of providing quality software to our customers. As such, we want our employees to feel empowered to seek growth and leadership opportunities within the company and position us to maintain our culture as we grow. RGi provides opportunities, resources, training, and mentorship to all our employees to let them take control of their careers and become a leader or a crucial member of our company. If this is what you are looking for in a company, then you are what we are looking for in an employee.

Reinventing Geospatial, Inc. is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, sex, national origin, age, veteran status, disability, or any other protected class. U.S. Citizenship is required for all positions.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.