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MercorMercor

Machine Learning Engineer, Marketplace

Build ML models and decision systems for search, ranking, candidate-job matching, and marketplace optimization at a fast-growing AI talent platform.

About the job

What You’ll Build

  • Ranking and matching systems that determine which candidates and opportunities are surfaced
  • Models for recommendation, personalization, and marketplace optimization
  • Retrieval, scoring, and decision pipelines operating at global scale
  • Feedback loops that learn from downstream hiring outcomes, not just top-of-funnel engagement
  • Real-time and batch inference systems embedded in product-critical workflows

Example Problems

  • Improve candidate-job matching using embeddings, structured attributes, and behavioral signals
  • Optimize ranking toward long-term hiring outcomes under delayed and incomplete labels
  • Design models that balance marketplace objectives such as fill rate, quality, speed, and conversion
  • Build systems for candidate allocation, opportunity routing, and liquidity optimization
  • Develop evaluation and experimentation frameworks that connect model performance to business results

What We’re Looking For

  • Strong track record of shipping ML systems into production
  • Experience with ranking, recommendation, search, matching, or marketplace problems
  • Good judgment on model design, objective functions, evaluation, and tradeoffs
  • Comfort working across the full applied ML stack: data, features, training, inference, and iteration
  • Strong engineering fundamentals and a bias toward simple, robust systems

Tech Stack

Python, Go, embeddings, fine-tuning, RAG, Kafka, Postgres, Redis, Elasticsearch, Kubernetes, Terraform

Benefits

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

Skills

Python, Go, Machine Learning, Embeddings, Fine-Tuning, RAG, Ranking, Recommendation Systems, Kafka, Postgres, Redis, Elasticsearch, Kubernetes, Terraform

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