Full-Stack Software Engineer

Mercor Remote

RemoteContract $50 – $80 an hour

About the role

This remote hourly contract is for a full-stack engineer with at least three years of production experience who can turn product ideas into detailed, testable software tasks. You'll write precise specifications, build reference implementations, and create browser-level acceptance tests for an AI advancement project. The work also involves evaluating frontier models and calibrating task difficulty.

What you’ll do

  • Write unambiguous product specifications that can be automatically evaluated.
  • Build complete reference implementations for the specifications you author.
  • Create browser-based acceptance tests for observable user behavior.
  • Run AI models against tasks and adjust their difficulty.
  • Confirm tasks cannot pass without a genuine implementation in an empty repository.

What they’re looking for

  • Have at least three years of professional full-stack engineering experience.
  • Have shipped and maintained live web applications.
  • Know a modern frontend framework and backend runtime.
  • Have production experience with authentication, permissions, payments, and file uploads.
  • Write technical specifications with precision.
  • Use Docker, Git, and command-line tools confidently.

Nice to have

  • Have created AI evaluations, benchmarks, or test suites.

What’s on offer

  • Remote hourly contract work.
  • US$50 to US$80 per hour.
  • Three openings.

Questions about this role

Is this Full-Stack Software Engineer role remote?

Yes. The job is listed as remote.

What does the contract pay?

The listed rate is US$50 to US$80 per hour.

How much experience do I need?

Applicants need at least three years of professional full-stack experience.

How many openings are available?

The posting lists three openings.

Do I need experience with AI evaluations?

No. That experience is described as a strong plus.

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