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.
Key Responsibilities
Design challenging coding problems with clear input/output specs, constraints, and explicit function signatures.
Develop complete mini-repos, including:
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Problem statement
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Reference solution
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Comprehensive unit tests (10–20 cases)
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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.
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)
Role Details
Expected commitment: \~10–20 hours/week
High-impact contributions to globally visible projects