Senior Software Engineer (Part-Time) Remote | $85 –$125 / hr

Senior Software Engineer (Part-Time) Remote | $85 –$125 / hr

Join to apply for the Senior Software Engineer (Part-Time) Remote | $85 –$125 / hr role at Call For Referral.

Base pay range

$85.00 / hr - $125.00 / hr

Helping AI Startups Hire 0→1 Founding Engineers & Product Talent | Backend & Infra | US & Europe

Software Engineer (Codebase Deep Reasoning & Evaluation)

Hourly Contract | Part-Time Remote | $85 –$125 per hour

About the Role

Mercor is partnering with one of the world’s leading AI research labs to engage experienced Software Engineers in a project advancing how AI systems understand and reason about large-scale, real-world codebases.

In this role, you’ll analyze complex, production-grade repositories to create and evaluate technically challenging coding tasks. You’ll explore multi-module systems, trace data flow, identify dependencies, and assess how advanced AI models comprehend architecture, design, and performance.

Your structured reasoning — supported by specific references to files, functions, and line numbers — will directly help shape the next generation of AI systems that think like top-tier engineers.

• Have 4+ years of elite software engineering experience at top-tier startups, quantitative trading firms, hedge funds, or similarly demanding technical environments.
• Have experience using coding agents or LLMs (e.g., Copilot, GPT-4, Claude, or Replit Agents) in your engineering workflow.
• Hold a degree in Computer Science (or equivalent practical expertise).
• Excel at systematic exploration — analyzing multiple files and dependencies before forming conclusions.
• Demonstrate evidence-based reasoning , citing concrete code references rather than assumptions.
• Possess strong cross-file synthesis skills, explaining how distributed logic connects across large systems.
• Show deep architectural understanding , identifying design patterns and performance tradeoffs.
• Display intellectual honesty and humility when reasoning under uncertainty.
• Communicate insights clearly through structured technical documentation .

Example Domains & Projects

You may work across diverse real-world repositories, such as :

Project Details

⚡ PS : Mercor reviews applications daily. Please complete your interview and onboarding steps to be considered for this opportunity. ⚡

Seniority level

Mid‑Senior level

Employment type

Part‑time

Job function

Engineering and Information Technology

Industries

Software Development

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