Java programmer Empleos en Tucson az

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 : - 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. * * * ## 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