Software Engineer, C – Codebase Q&A

Job not on LinkedIn

🕒 September 12

🇺🇸 United States – Remote

💵 $130 / hour

⏳ Contract/Temporary

🟡 Mid-level

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 17%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Mercor

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2023

🔥 Funding within the last year

💰 $350M Series C - Mercor on 2025-10

Mercor is a company for which no descriptive text was provided in the input. Additional information (products, services, target customers, or industry specifics) is needed to create an accurate summary and select appropriate industries.

📋 Description

• 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