Backend Developer

• 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
• Create and evaluate realistic software engineering tasks for a leading AI Lab
• Produce high-quality, production-realistic coding tasks
• Deliver complete and correct reference implementations
• Produce robust test coverage and validation artifacts
• Provide structured, actionable peer review feedback

• 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 such as pytest, Jest, JUnit, xUnit, or Go testing
• Proven ability to debug and navigate large, multi-file codebases
• Experience with code reviews, refactoring, and production migrations
• Must be based in Chile

• Part-time, project-based expert evaluation work
• Consultants control their own schedule
• Consultants may simultaneously provide services to other vendors/employers, subject to those vendors’ allowances
• Paid on a per-project basis