# Research Engineer, Environments

**Company:** [Mercor](https://hotfix.jobs/companies/mercor)
**Location:** San Francisco, CA
**Role:** ML Engineering
**Salary:** $180k – $500k/yr
**Skills:** full stack engineering, workflow extraction, classification models, grading models, autonomous task refinement, rl environments, agentic evaluations, sandbox app clones, Prompt Engineering, verifiers, Temporal, modal, synthetic data generation
**Posted:** 2026-07-24

> Build and ship high-fidelity RL environments, verifiers, and evaluation pipelines from enterprise workflow data to train and assess frontier AI models. Requires prior experience shipping environments or agentic evals plus strong full-stack engineering skills with a bias for action and detail.

## Job Description

## What You'll Do
- Ship models for workflow extraction, classification, and grading.
- Engineer autonomous task refinement processes which distill data taste into pipelines.
- Deliver data to customers and deploy into real engagements.
- Help define the future of agentic transformation for enterprises around the world.
- Deeply learn about the intricacies of enterprises through building evaluations for all aspects of work.
- Build end-to-end environments for labs & enterprises by platformizing sandbox app clones, load real data into the sandboxes, build prompts from real workflows, and write verifiers leveraging enterprise expertise & golden outputs.
- Systematize the production of environments to scale throughput while maintaining high-quality worlds and verifiers.

## What We're Looking For
- Prior experience shipping environments – you’ve contributed to an OSS framework, built environments at previous companies, or worked on agentic evaluations.
- Strong full-stack engineering skills – you’ll be responsible for everything from infrastructure to app code to analytics.
- Bias to action – this team is focused on shipping evals, not just philosophizing about them.
- Curiosity – being biased towards understanding and digging deep into model behavior and actually looking at the data.
- Sweat the details that make a simulation indistinguishable from the real thing and have systems-level thinking skills that allow you to scale up quality.

## Nice to Have
- Experience with Temporal, Modal, or similar orchestration/compute services.
- Experience with synthetic data generation for frontier models.
- Past work auditing and scrutinizing industry-standard evaluations.

## Benefits
- Semi-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.

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**Apply:** https://hotfix.jobs/jobs/96c95c8f-223b-45b3-978e-67524e756caf
**Canonical:** https://hotfix.jobs/jobs/96c95c8f-223b-45b3-978e-67524e756caf