Machine Learning Engineer, Frontier Data Products
Mercor · San Francisco · New York City
CHECKED 23H AGO
Applied AIonsite$160k–$500k
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