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Software Engineer, Agent Harness

Our mission is to automate coding. The first step in our journey is to build the best tool for professional programmers, using a combination of inventive research, design, and engineering. Our organization is very flat, and our team is smal

Company

Cursor

Location

San Francisco; New York

Status

Open

Posted

2025-10-27T22:03:46.896+00:00

Cursor is hiring a software engineer for its Agent Harness team, onsite in San Francisco or New York. The person builds the agent loop, tools, prompts and execution environment shared across Cursor products, tunes model behaviour and the default "Auto" model selection, shapes the default agent's personality, and helps launch new models with foundational providers and the research team. The posting asks for strong software engineering fundamentals, production shipping experience, and opinions on model and agent behaviour; eval datasets or frameworks and tools used by other engineers are a plus.