Mercor is seeking experienced developers with a proven record of open-source contributions to join a high-quality, global network of engineers supporting AI, data, and enterprise software infrastructure projects.
This opportunity is designed for developers who are deeply engaged in the open-source ecosystem and have a passion for backend architecture, scalable systems, and reliable software engineering.
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## Key Responsibilities
- Design challenging coding problems with clear input/output specs, constraints, and explicit function signatures.
- Develop complete mini-repos, including:
- Problem statement
- Reference solution
- Comprehensive unit tests (10–20 cases)
- Executable test runner
- Implement clean, production-quality code aligned strictly with test expectations.
- Write high-coverage tests covering edge cases, invalid inputs, and performance constraints.
- Ensure full executability with no missing dependencies, configuration issues, or signature mismatches.
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## Requirements
- 3+ years of backend development experience in one or more of the following languages: Rust, C++, C, COBOL, Java, Ruby, PHP, Python, TypeScript, Go, C#, JavaScript
- Familiarity with Docker and basic CI/CD workflows (e.g., GitHub Actions or similar tools)
- Strong understanding of clean code, modular design, and performance optimisation
- Comfortable working with Git-based collaboration (PRs, issues, reviews)
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## Role Details
- Expected commitment: ~10–20 hours/week
- High-impact contributions to globally visible projects