Backend Developer - AI Trainer (Germany)

📋 Description Design and implement multi-file tasks across bug fixing, features, refactoring, and testing Write clear natural-language specifications and reference implementations Develop and extend unit and integration tests 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 Advanced professional written proficiency in English 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 migrations 🎁 Benefits Part-time, project-based expert evaluation work Remote work Consultants control schedule and tools Paid per project; hourly estimates provided Collaborate with a leading AI lab