Software Engineer, Agents

About Mercor Mercor's mission is to organize human intelligence to power the AI economy. We're a leading AI data company, building the layer between human expertise and frontier models. Millions of domain experts on the platform are paid over $4 million per day to train frontier AI models.

Mercor's APEX benchmark family measures AI's real-world impact on professional work. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents.

Mercor is creating a new category of work where expertise powers AI advancement. Achieving this requires an ambitious, fast-paced and deeply committed team. You’ll work alongside researchers, operators, and AI companies at the forefront of shaping the systems that are redefining society.

Mercor is a profitable Series C company valued at $10 billion. We work in-person five days a week in our San Francisco, NYC, or London offices.

About the Role

We're looking for a strong engineer who can build agentic products that scale. You will work with: Backend : Python, FastAPI, Django, Pydantic Frontend : Next.

js, React, TypeScript, Tailwind Data : PostgreSQL, MySQL, Snowflake, DuckDB, Redis Orchestration/Infra : Kubernetes, Temporal, Modal, Woz Agents/LLM : LangGraph, LangChain, FastMCP, Harbor, NemoGym Observability : Datadog, PostHog, LangSmith At the end of the process, you’ll be team-matched to where you can have the most impact, on one of the following: Automation – We build intelligent systems and agents that automate operational work at scale—handling talent management, decision-making insights, and knowledge access—so humans can focus on higher-level thinking.

This is a newly formed, CEO-facing team focused on 0→1 product development, with a strong emphasis on business impact. The work is highly cross-functional, touching nearly every system across the company. Studio – We own Mercor’s evaluation system & annot