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Intern Java Backend Developer Jobs in St Louis, MO

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Senior Software Engineer - Java

O Fallon, MO · Hybrid

$116K - $153K/yr

The ideal candidate brings strong hands-on Java backend expertise combined with modern frontend development experience, a passion for engineering excellence, and the ability to contribute to ...

Clearwing

Backend Java Developer

Chesterfield, MO · On-site

$80 - $100/hr

Job Discription Java Programming language - Candidate will have an opportunity to work directly with the users, business analyst, translate business requirements into the technical architecture and ...

SESHENG LLC

Java Developer

O Fallon, MO · On-site

$47.75 - $61.75/hr

Java Engineer Onsite( 5days) O''Fallon, Missouri An ideal candidate for this role would have ... This level of database knowledge is crucial for data-heavy applications and backend services.

Panasonic

Intern - Back-End Cloud Developer

Bridgeton, MO · On-site

$18.25 - $24/hr

As the Back-End Cloud Developer intern in the 2027 Hussmann Summer Internship Program, you will be ... Solid programming fundamentals in Object Oriented language (Java preferred) * Basic understanding ...

Leidos

Mid-Level Backend Software Engineer

Arnold, MO · On-site

$87K - $157K/yr

Design, develop, test, and maintain backend application components using Java or Python * REST API ... Object-Oriented Programming: Apply object-oriented design principles to build scalable and ...

Leidos

Mid-Level Backend Software Engineer

Roxana, IL · On-site

$87K - $157K/yr

Design, develop, test, and maintain backend application components using Java or Python * REST API ... Object-Oriented Programming: Apply object-oriented design principles to build scalable and ...

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All JobsIntern Java Backend Developer JobsIntern Java Backend Developer Jobs in St. Louis, MO

Intern Java Backend Developer information

See St Louis, MO salary details

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$53

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How much do intern java backend developer jobs pay per hour?

As of Sep 4, 2026, the average hourly pay for intern java backend developer in St. Louis, MO is $53.11, according to ZipRecruiter salary data. Most workers in this role earn between $47.21 and $61.25 per hour, depending on experience, location, and employer.

What does an intern Java backend developer do?

An Intern Java Backend Developer assists in building and maintaining the server-side logic of web applications using Java. They typically work under the guidance of senior developers, writing code, fixing bugs, and learning about frameworks like Spring or Hibernate. Their responsibilities often include database interaction, API development, and ensuring applications are scalable and efficient. Interns gain practical experience with industry-standard tools and workflows, helping prepare them for a full-time backend development role.

What kinds of projects and tasks can I expect as an intern Java backend developer?

As an Intern Java Backend Developer, you’ll typically work on tasks such as writing and testing APIs, fixing bugs, and implementing core backend features under the guidance of senior developers. You may also participate in code reviews, collaborate with frontend and QA teams, and help with database management or performance optimization. These projects are designed to give you hands-on experience with Java frameworks, version control systems, and agile development practices, all while contributing to real-world applications.

What are the key skills and qualifications needed to thrive as an intern Java backend developer, and why are they important?

To thrive as an Intern Java Backend Developer, you need a solid understanding of Java programming, object-oriented principles, and basic knowledge of backend frameworks like Spring, often supported by coursework or relevant projects. Familiarity with databases (such as MySQL), version control systems like Git, and build tools (e.g., Maven or Gradle) is typically expected. Strong problem-solving abilities, eagerness to learn, and effective communication skills help you collaborate and adapt in team environments. These skills and qualities are crucial for contributing to real projects, growing your technical expertise, and supporting overall team success.

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Intern Java Backend Developer jobs near you
Infographic showing various Intern Java Backend Developer job openings in St. Louis, MO as of August 2026, with employment types broken down into 80% Full Time, 9% Part Time, and 11% Contract. Highlights an 80% Physical, 5% Hybrid, and 15% Remote job distribution, with an average salary of $110,475 per year, or $53.1 per hour.

Core Java Developer

Stellar IT Solutions LLC

Saint Louis, MO • Remote

$50 - $55/hr

Contractor

Posted 18 days ago

Job description

Position: Core Java Developer Location: Remote

Duration: 6+ Months Contract

Role Overview

We are seeking experienced Senior Core Java Developers to join our team and contribute to building secure, scalable, and production‑ready applications. The ideal candidate will have strong expertise in Java, microservices architecture, and containerization, with hands‑on experience in developing REST APIs and implementing secure coding practices. This role requires deep technical proficiency in backend engineering, combined with the ability to collaborate across teams and deliver high‑quality solutions in enterprise environments.

Key Responsibilities

  • Design, develop, and maintain Core Java applications with a focus on scalability and performance.

  • Build and integrate microservices architectures using Spring Boot, Spring Security, and Spring Web MVC.

  • Develop and optimize REST APIs for secure and efficient communication between services.

  • Implement secure coding practices to remediate vulnerabilities and ensure compliance with enterprise standards.

  • Work with containerization platforms (Docker, Kubernetes, OpenShift) to deploy and manage applications.

  • Collaborate with cross‑functional teams including QA, DevOps, and product owners to deliver production‑ready solutions.

  • Conduct code reviews, troubleshoot issues, and provide technical guidance to junior developers.

  • Support CI/CD pipelines and ensure smooth deployment processes.

Required Skills

  • Strong expertise in Core Java development.

  • Hands‑on experience with containerization (Docker, Kubernetes, OpenShift).

  • Proficiency in microservices architecture and REST API development.

  • Solid knowledge of Spring Boot, Spring Security, Spring Web MVC.

  • Experience with secure coding practices and vulnerability remediation.

Nice to Have

  • Experience with Harness for CI/CD orchestration.

  • Familiarity with Postman or other API testing tools.

  • Exposure to Red Hat OpenShift for enterprise container management.