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← Mercor

Fullstack Software Engineer, Agent Platform

Mercor · San Francisco

CHECKED 22H AGO

Applied AIonsitemid-level$160k–$500k
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At a glance

Highlights

  • Own the core agent platform used daily internally and demoed live to clients.
  • Build the foundational layer teams use to launch new agent use cases fast.
  • Ship high-leverage features that boost internal productivity and client quality.

What they offer

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

Ideal candidate

High-ownership builder who cares equally about craft and product impact, with strong user empathy and comfort navigating ambiguity to ship polished, reliable platforms in a fast-paced team.

Requirements

  • 2+ years of fullstack engineering experience building and shipping production software
  • Deep proficiency in JavaScript/TypeScript (React + Next.js) and frontend architecture, state management, and design patterns
  • Solid backend experience in Python and/or Node.js — relational databases, REST APIs, and async task infrastructure
  • Strong design sense and empathy for end-users with high bar for usability
  • Experience with complex, high-throughput systems — pipelines, large data volumes, or multi-tenant architectures
  • High ownership mindset; able to navigate ambiguity and drive projects from design through delivery
  • Strong communication skills and ability to articulate technical and product tradeoffs clearly
remote policy
In-person 5 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
More about Mercor →
Apply on the lab’s site ↗