Full-Stack Developer - AI Trainer (Remote, Czechia)

About the role

Anyone AI is recruiting Full-Stack Developers to work on a project with a leading AI lab. This is a part-time, project-based consultant role where contributors design and evaluate realistic software engineering tasks, such as bug fixes, feature implementation, refactoring and migration, and test generation. It also includes creating complex coding scenarios and reviewing peer submissions for quality and accuracy. The work is remote.

Key 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

Required profile

• Advanced professional written proficiency in English
• 3-7 years of professional software engineering experience
• Backend or full-stack development experience in production systems
• Proven ability to debug and navigate large, multi-file codebases
• Experience with code reviews, refactoring and production migrations

Required skills

• Strong proficiency in Python and JavaScript/TypeScript
• Working knowledge of Java, C# or Go
• Testing frameworks such as pytest, Jest, JUnit, xUnit or Go testing

Consultants are paid on a per-project basis; hourly rates are estimates based on anticipated completion time. They control their own schedule, provide their own tools and may work for other vendors at the same time, subject to those vendors' allowances.