Full-time

Sr. Software Development Engineer

Posted by Mercor • Montreal (administrative region), QC, Canada

📍 Montreal (administrative region), QC 🕒 February 24, 2026

About the Role

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

Type

Freelance

Compensation

$70–$130/hour

Duration

1–2 months

Commitment

15–25 hours/week, with flexibility up to 40 hours/week

Role Responsibilities

  • Review model-generated code trajectories on realistic software engineering tasks.
  • Reconstruct chain-of-thought reasoning that explains each step of the solution process.
  • Annotate decision points, debugging logic, and problem-solving strategies.
  • Use full task context (codebase, issue descriptions, test cases) to infer plausible reasoning.
  • Ensure annotations reflec...

Ready to Apply?

Submit your application today and take the next step in your career journey with Mercor.

Apply Now