Software Engineer, C – Codebase Q&A
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Job Description
C engineer creating runtime-focused codebase Q&A tasks for Mercor’s AI training datasets. Exploring production repositories and validating rubrics for AI-agent reasoning.
Responsibilities:
- Select tasks from a pre-validated pool of C repositories pinned to specific git commits
- Explore repositories and relevant pull-request or issue history to understand subsystems
- Rewrite engineering questions to challenge frontier coding agents while remaining well-defined
- Adjust rubrics and foils to reward correct reasoning and reject plausible-but-wrong answers
- Run the validation loop in Mercor Studio: Check, Golden, Run, and Analyze
- Iterate until every validation stage passes
- Document work in task READMEs
- Submit tasks for expert review and address reviewer feedback
Requirements:
- 3+ years of professional software engineering experience
- Substantial production C experience
- Ability to navigate large, unfamiliar C codebases and explain runtime behavior
- Comfort with preprocessor-heavy builds, platform conditionals, manual memory management, and autotools/CMake/Meson build graphs
- Experience with databases, cryptography, networking protocols, or systems programming highly relevant
- Ability to use debuggers, sanitizers, tracing, and profilers
- Precise written English
- Must complete identity verification and a background check
- Must sign Terms of Work and CIIAA
- Must provide a tax form
- Must pass a short calibration quiz before task access
- Qualified applicants may complete a brief technical assessment or provide additional information
Benefits:
- Remote work
- Asynchronous work
- Payment of $130 per approved task
- Expert team leads across US, India, and Nigeria time zones
- Identity verification, background check, signed Terms of Work and CIIAA, tax form, and calibration quiz before task access
- Reasonable accommodations upon request
- Referral opportunity earning up to $250 per successful referral
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