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← Mercor

Machine Learning Engineer, Frontier Data Products

Mercor · San Francisco · New York City

CHECKED 23H AGO

Applied AIonsite$160k–$500k
Apply on the lab’s site ↗

At a glance

Highlights

  • Build ML systems that score and validate complex expert work for frontier models.
  • Design evaluation frameworks for ambiguous tasks with noisy, disputed labels.
  • Own feedback loops turning human review into compounding model improvements.

What they offer

  • Bi-annual performance bonus structure
  • Generous equity grant vested over 4 years
  • Up to $15k relocation bonus
  • $10K housing bonus if within 0.5 miles of office
  • $1.5K monthly meals stipend
  • Free Equinox membership
  • $200 monthly laundry reimbursement
  • $200 monthly wellness reimbursement
  • Health, Dental, Vision insurance

Ideal candidate

Applied ML builder who ships simple, inspectable systems and obsesses over real-world output over benchmarks. Comfortable with ambiguity and motivated to define how models and experts work together.

Requirements

  • Track record of shipping ML systems that improved a real product, workflow, or business metric
  • Strong instincts for model quality, evaluation design, error analysis, and production failure modes
  • Comfort operating in ambiguous spaces where labels are imperfect and correctness evolves
  • Sound judgment on when to use prompting, fine-tuning, heuristics, retrieval, or human review
  • Solid engineering fundamentals across the full ML stack
  • Familiarity with LLM applications, evaluation frameworks, or human-in-the-loop ML is a strong plus
remote policy
In-person five days a week

Lab profile

About Mercor

AI data company organizing human expertise to train frontier models for the AI economy.

What they build

  • APEX benchmark family
  • Mercor Enterprise
  • Human expertise training data platform

Known for

  • Massive domain-expert network
  • Frontier model training infrastructure
  • Real-world professional work evaluation

Key facts

  • Millions of domain experts on platform
  • Pays over $4M per day to experts
More about Mercor →
Apply on the lab’s site ↗