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Full Stack Engineer Intern Jobs in Ballwin, MO (NOW HIRING)

Worky

Full Stack Software Engineer

Saint Louis, MO · On-site

$125 - $150/hr

As a Full Stack Software Engineer, you will... * Develop, deploy, and maintain cloud-based services using AWS Lambda, EC2, and other core AWS services. * Write and maintain code in C#, Java ...

CACI

Full Stack Web Developer

Saint Louis, MO

Full Stack Web Developer Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required:

Leidos LLC

Journeyman Full Stack Developer

Saint Louis, MO · On-site

$80 - $100/hr

The Leidos National Solutions Division has an exciting opportunity for a Journeyman Full Stack Engineer to assist with the software development, maintenance, integration, deployment, and sustainment ...

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All JobsFull Stack Engineer Intern JobsFull Stack Engineer Intern Jobs in Ballwin, MO

Full Stack Engineer Intern information

See Ballwin, MO salary details

$13

$24

$37

How much do full stack engineer intern jobs pay per hour?

As of Sep 7, 2026, the average hourly pay for full stack engineer intern in Ballwin, MO is $24.72, according to ZipRecruiter salary data. Most workers in this role earn between $20.10 and $28.03 per hour, depending on experience, location, and employer.

What is a full stack engineer intern?

Full Stack Engineer Interns are students or recent graduates who assist in developing both the front-end and back-end components of web applications. They work under the guidance of experienced engineers to gain hands-on experience with programming languages, frameworks, and tools used throughout the software development lifecycle. Their responsibilities often include writing code, testing applications, fixing bugs, and collaborating with teams to deliver functional software. Through this internship, they develop practical skills and a deeper understanding of how web systems work end-to-end.

What are the key skills and qualifications needed to thrive as a full stack engineer intern?

To thrive as a Full Stack Engineer Intern, you need a solid understanding of programming languages like JavaScript, HTML, CSS, and at least one backend language, often supported by coursework or relevant project experience. Familiarity with frameworks such as React or Angular, backend systems like Node.js or Django, version control (Git), and basic database management is typically expected. Strong problem-solving skills, eagerness to learn, and effective communication help interns stand out in fast-paced development teams. These skills and qualities are essential for contributing to real-world projects, collaborating effectively, and accelerating professional growth in a technical environment.

What types of projects and technologies can I expect to work with as a full stack engineer intern?

As a Full Stack Engineer Intern, you can expect to work on a variety of projects ranging from building user interfaces with front-end frameworks like React or Angular to developing backend services using technologies such as Node.js, Python, or Java. Interns often assist with integrating APIs, database management, and testing features in both development and production environments. You'll likely collaborate closely with designers, product managers, and other developers, gaining exposure to the complete software development lifecycle. This hands-on experience is designed to help you build practical skills and contribute meaningful code to real applications.

What is the difference between Full Stack Engineer Intern vs Software Developer Intern?

AspectFull Stack Engineer InternSoftware Developer Intern
Required CredentialsTypically pursuing or recently completed a degree in Computer Science or related fieldTypically pursuing or recently completed a degree in Computer Science or related field
Work EnvironmentHands-on experience with both front-end and back-end development in a team settingFocus on coding, debugging, and developing software applications, often in a specific area
Employer & Industry UsageTech companies, startups, and organizations seeking versatile interns with full-stack skills

The Full Stack Engineer Intern role involves working across both front-end and back-end technologies, providing a broad development experience. In contrast, a Software Developer Intern may focus more narrowly on specific software components or applications. Both roles are valuable for gaining industry experience, but the Full Stack Engineer Intern position offers a more comprehensive view of the entire development process.

What cities near Ballwin, MO are hiring for Full Stack Engineer Intern jobs?

Cities near Ballwin, MO with the most Full Stack Engineer Intern job openings:

Full Stack Engineer Intern jobs near you
Infographic showing various Full Stack Engineer Intern job openings in Ballwin, MO as of August 2026, with employment types broken down into 72% Full Time, and 28% Contract. Highlights an 100% In-person job distribution, with an average salary of $51,409 per year, or $24.7 per hour.

Full-Stack - AI Specialist

The Timberline Group

Saint Peters, MO • On-site

Full-time

Medical, Dental, Vision, Life, Retirement

Posted 14 days ago

Job description

US Citizens or GC Holders only
Must be on W2 - no C2C
Direct - Hire - Local Applicants only
Seeking an experienced Full-Stack Developer to join its growing AI team. In this role, you'll help support, improve, and build the internal applications used every day by our claims, QA, and sales teams. Our current portfolio includes applications for paid-claims review, multi-vendor parts sourcing, outbound lead management, and representative training, built with Angular front ends and ASP.NET Core (.NET 10) APIs.
This role combines new development with ownership of applications already in production. You'll troubleshoot issues reported by users, improve performance and reliability, keep the technology stack current, build new features end to end, and maintain integrations with critical business systems. You'll also work with AI-enabled functionality, including applications that use LLMs and AI agents to review claims and score risk.
  • Support and improve production applications, resolving user-reported issues, performance bottlenecks, and edge cases
  • Build new features end to end using Angular, TypeScript, C#, and ASP.NET Core
  • Maintain and modernize applications through Angular upgrades, dependency updates, vulnerability patching, and database migrations
  • Diagnose and optimize slow queries and application performance
  • Maintain integrations with SQL Server, Microsoft Fabric, Salesforce, and third-party vendor APIs
  • Support and monitor LLM and AI-agent functionality embedded within production applications
  • Containerize and deploy applications using Docker and GitHub Actions
  • Support application authentication and access using Active Directory and LDAPS
  • Work within existing codebases, understand established design decisions, and make thoughtful, maintainable changes
  • Collaborate in a fast-moving environment where solutions are shipped, measured, and iterated based on real-world results
Requirements
  • Strong full-stack software development experience in a production environment.
  • Hands-on experience with C# and ASP.NET Core/.NET.
  • Strong understanding of relational databases and SQL; SQL Server experience preferred.
  • Experience supporting and maintaining applications after production launch.
  • Ability to troubleshoot production issues, analyze existing code, and implement durable fixes.
  • Comfortable working from evolving requirements and independently driving features from development through deployment.
  • Experience with REST APIs and third-party system integrations.
  • Familiarity with Docker, CI/CD pipelines, and GitHub Actions preferred.
  • Experience with Active Directory, LDAP/LDAPS, or enterprise authentication preferred.
  • Experience with Microsoft Fabric and/or Salesforce integrations preferred.
  • Interest in building AI-enabled applications and working with LLMs or AI agents.
  • Must be able to work on-site in St. Peters, MO 5 days/week.
  • Bachelor's in Computer Science, Software Engineering, MIS, or equivalent experience.
Pay Rate and Benefits
  • Salary commensurate with experience
  • Group Insurance (Medical, Dental, Vision, Life, etc.).
  • 401k with Employer Match.
  • Discounted Tuition at Lindenwood University.
  • Professional development opportunities.
  • Basketball, and other recreation available on-site.
  • Fitness facilities, with the option to take classes led by on-staff personal trainer (at St. Peters headquarters).
  • And more!

The Timberline Group
Phone: 636-209-5537
PO Box 385, Lebanon, MO 65536
www.timberlinegrp.com
resumes@timberlinegrp.com
"Delivering quality solutions through quality people"

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