Full-Stack Developer - AI Trainer (Germany)

Anyone AI is recruiting skilled Full-Stack Developers to work on a project with a leading AI lab. Qualifications: • 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 (e.g., pytest, Jest, JUnit, xUnit, Go testing) • Proven ability to debug and navigate large, multi‑file codebases • Experience with code reviews, refactoring, and production migrations Engagement: Part-time, project-based expert evaluation work Work Type: Remote Contributors will design and evaluate realistic software engineering tasks, including bug resolution, feature implementation, refactoring/migration, and test generation. Work includes both creating complex coding scenarios and reviewing peer submissions for quality and accuracy. This is a project-based consultant role. Consultants will be paid on a per-project basis; hourly rates are estimates based on anticipated completion time. Consultants control their own schedule, provide their own tools, and may simultaneously provide services to other vendors/employers (subject to those vendors’ allowances). Responsibilities: Contributors will: • 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 Expected Outcomes: • High-quality, production-realistic coding tasks • Complete and correct reference implementations • Robust test coverage and validation artifacts • Structured, actionable pe