Open Source Contributor – Rust

Mercor is seeking experienced Rust developers with a proven record of open-source contributions to join a high-quality, global network of engineers supporting AI, data, and high-performance infrastructure projects.

This opportunity is designed for developers who are deeply engaged in the open-source ecosystem and have a passion for systems programming, performance, safety, and reliability.

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 Rust code aligned strictly with test expectations.

• Write high-coverage tests covering edge cases, invalid inputs, concurrency issues, and performance constraints.

• Ensure full executability with no missing dependencies, borrow checker violations, or build configuration issues.

Requirements

• 3–6 years of professional software development experience, with strong experience in Rust

• Strong proficiency in Rust fundamentals, including ownership, borrowing, lifetimes, and trait-based design

• Experience building backend services using frameworks such as Actix Web, Axum, Rocket, or similar

• Working knowledge of async programming (Tokio, async/await)

• Experience with databases: PostgreSQL / MySQL / MongoDB

• Experience writing unit and integration tests using Rust’s built-in testing framework

• Familiarity with Cargo, Docker, and basic CI/CD workflows (GitHub Actions or similar)

• Strong understanding of memory safety, concurrency models, and performance optimisation

• Comfortable working with Git-based collaboration (PRs, issues, reviews)

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Role Details

• High-impact contributions to globally visible infrastructure and systems projects

• Part-time / Contract (10–20 hours per week)