Backend Developer - AI Trainer (Netherlands)

Stack

Responsibilities

• ▹Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testing
• ▹Write clear natural-language specifications and reference implementations
• ▹Develop and extend unit and integration test suites
• ▹Review peer-generated tasks for correctness, clarity, and realism
• ▹Identify edge cases, ambiguities, and potential failure modes
• ▹Ensure alignment between specifications, code, and expected outputs

Requirements

• ▹3-7 years of professional software engineering experience
• ▹Strong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or Go
• ▹Backend or full-stack development experience in production systems
• ▹Experience with testing frameworks (pytest, Jest, JUnit, xUnit, Go testing)
• ▹Proven ability to debug and navigate large, multi-file codebases
• ▹Experience with code reviews, refactoring, and production migrations

Soft skills

What we offer

• ▹Part-time, project-based, flexible engagement
• ▹Fully remote work
• ▹Per-project compensation with estimated hourly rates

About the company

Anyone AI matches software engineers with project-based evaluation engagements for a leading AI lab.