Backend Developer - AI Trainer (Remote, France)

About the role

Anyone AI is recruiting Backend Developers to act as project consultants who design and evaluate realistic software engineering tasks. The work is part-time, project-based and remote, and involves both creating complex coding scenarios and reviewing peer submissions for quality and accuracy.

Key responsibilities

• Design and implement multi-file coding tasks covering 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 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 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 per project, control their own schedule, provide their own tools and may work for other employers at the same time.