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.

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.

• High-quality, production-realistic coding tasks.

• Complete and correct reference implementations.

• Robust test coverage and validation artifacts.

• Structured, actionable peer review feedback.

• 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.

Work arrangement: Fully remote

Eligible countries: United Kingdom

• Consultants will be paid on a per-project basis; hourly rates are estimates based on anticipated completion time.