AI Developer Intern: Build Real-World AI Apps (Onsite)

Marvin Engineering Company; Inglewood (CA); On-site; USD 28,000 - 41,000; Full time

Job summary

The Marvin Group in Southern California near LAX is seeking an AI Development Intern to support prototyping, building, and shipping AI-enabled internal applications. You will work directly with users to turn workflow needs into maintainable software.

Responsibilities include integrating LLM APIs, building Python/TypeScript logic, connecting to databases, handling authentication and data quality, and creating tests. You will gain hands-on experience in a fast-paced defense tech environment.

Qualifications

• Must be enrolled or have completed an undergraduate or postgraduate, or accredited technical program and be a Sophomore, Junior, Senior or Postgraduate student by the start of summer, pursuing Information Technology, Computer Science, or related field.
• Demonstrated ability to build and ship functioning software applications, including examples that use LLMs or other AI services.
• Working proficiency in Python and/or TypeScript plus core web concepts such as APIs, HTML/CSS, and client-server behavior.
• Experience with SQL or other application databases, data integration, version control, debugging, testing, and deployment workflows.
• Ability to evaluate nondeterministic AI behavior, define acceptance checks, recognize failure modes, and communicate tradeoffs clearly.

Responsibilities

• Build and iterate on AI-enabled internal web applications from working prototype through reliable release.
• Integrate LLM APIs, structured outputs, retrieval, and tool or function calling where they solve a clear user need.
• Develop application logic in Python and/or TypeScript, with practical front-end, back-end, API, and web-interface work.
• Connect applications to databases, business data, and external services while handling authentication, errors, and data quality.
• Create evaluations and automated tests; review outputs, dependencies, permissions, and data handling with a security-minded approach.
• Work with users to observe results, troubleshoot issues, document systems and decisions, and improve usefulness, reliability, and maintainability.

Skills

Python

TypeScript

APIs

HTML/CSS

Client–server

SQL

Version control

Testing

Deployment workflows

AI services

Education

Undergraduate/Graduate IT or CS program

Tools

Claude Code

OpenAI Codex

Job description

The Marvin Group in Southern California near LAX is seeking an AI Development Intern to support prototyping, building, and shipping AI-enabled internal applications. You will work directly with users to turn workflow needs into maintainable software.

Responsibilities include integrating LLM APIs, building Python/TypeScript logic, connecting to databases, handling authentication and data quality, and creating tests. You will gain hands-on experience in a fast-paced defense tech environment.