C Engineer - Codebase Specialist

About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey .

Position: Software Engineer, C — Codebase Q&A

Type: Contract Compensation: $130 per approved task Location: Remote Role Responsibilities

• Select tasks from a pre-validated pool of C repositories, each with an engineering question and a golden solution.
• Explore the repository to understand the subsystem, including relevant PR or issue history.
• Rewrite task questions to challenge frontier coding agents while ensuring clarity and fairness.
• Adjust rubrics and foils to reward correct reasoning and reject incorrect answers.
• Run the full validation loop in Mercor Studio and iterate until every stage passes.
• Document work in the task README and address reviewer feedback on returned tasks.

Qualifications Must-Have

• 3+ years of professional software engineering experience with substantial production C.
• Ability to navigate large, unfamiliar C codebases and explain runtime behavior.
• Comfort with preprocessor-heavy builds, platform conditionals, and manual memory management.
• Experience with databases, cryptography, networking protocols, or systems programming.
• Ability to use debuggers, sanitizers, tracing, and profilers.
• Precise written English for crafting questions and rubrics.

Working Details

• Fully remote and asynchronous work with team leads across US, India, and Nigeria.
• Work is performed in Mercor Studio; time tracked with Insightful and access provisioned through Okta.
• Onboarding requires identity verification, a background check, signed Terms of Work and CIIAA, a tax form, and passing a short calibration quiz.

Application Process (Takes 20–30 mins to complete)

• Submit your resume or relevant technical background to get started.
• Qualified applicants may be asked to complete a brief technical assessment or provide additional information.

Resources & Support

• For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome
• For any help or support, reach out to: [email protected]

PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity. ,