Software Engineer I (US)
San Francisco, CA | Full-time | $130K–$160K + Equity
About Mercor
Mercor is building the AI that builds teams.
We train large-scale models that predict on-the-job performance with greater accuracy than human interviews. Our platform already powers hiring at top AI labs. We scaled from $1M to $100M ARR in just 11 months—making us the fastest-growing AI startup on record.
What You’ll Do
As a Software Engineer I, you’ll:
- Ship production code weekly across Python, Go, and a React/Next.js frontend screening millions of candidates.
- Design and implement microservices for real-time ranking, interview analytics, and payments moving millions of dollars.
- Work closely with senior engineers to profile, test, and optimize LLM-powered agents.
- Collaborate directly with users to turn pain points into features, owning projects end-to-end.
You’ll Thrive Here If
- You have strong CS fundamentals and projects you’re excited to demo.
- You iterate quickly—prototype, test, and ship in days.
- You value product polish as much as system performance.
- You’re curious about LLMs, retrieval, and ranking (no prior experience required).
Tech Stack
- Backend: Go, Python
- Frontend: React, Next.js
- Infrastructure: AWS
Compensation & Benefits
- $130K–$160K per year
- Equity package included
- San Francisco HQ with hybrid flexibility
- Opportunity to learn from top engineers from Stripe, Jane Street, Citadel, and Databricks