# Research Engineer Intern - Environments, Data and Post-Training at Mercor

- Company: Mercor
- What the company does: Mercor is organizing human intelligence to power the AI economy. We are powering frontier research, AI benchmarks, and AI agent training at scale for the top AI labs and enterprises. Backed by General Catalyst and Menlo.
- Company website: https://mercor.com/
- Type: Startups
- Level: Internship
- Location: San Francisco
- Work setup: On-site
- Pay: $70/hr (USD)
- Posted: 2026-10-27
- Apply by: 2026-12-11
- Apply: https://jobs.ashbyhq.com/mercor/049bd532-6fb7-4ae6-85a1-788dd31a14ca?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/mercor-research-engineer-intern-environments-data-and-post-training/

## About the role

As a Research Engineer at Mercor, you’ll work at the intersection of engineering and applied AI research. You’ll contribute directly to post-training and RLVR, synthetic data generation, and large-scale evaluation workflows that meaningfully impact frontier language models. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Strong applied research background, with a focus on post-training and/or model evaluation
- Strong coding proficiency and hands-on experience working with machine learning models
- Strong understanding of data structures, algorithms, backend systems, and core engineering fundamentals
- Familiarity with APIs, SQL/NoSQL databases, and cloud platforms
- Ability to reason deeply about model behavior, experimental results, and data quality
- Excitement to work in person in San Francisco, five days a week (with optional remote Saturdays), and thrive in a high-intensity, high-ownership environment

Tags: Research

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/mercor-research-engineer-intern-environments-data-and-post-training/