Impactful Full-Stack Engineer for Research Tools

Cursor; San Francisco (CA); On-site; USD 150,000 - 190,000; Full time

Job summary

Cursor in San Francisco is seeking a Software Engineer on the RL Data team to design and build tools used by researchers and external contributors to create, review, submit, and monitor environments and tasks behind Cursor’s reinforcement-learning runs. This is a full-stack product-engineering role embedded in a research team.

You’ll own the review and acceptance experience end to end: from rollout and transcript inspection, task-quality signals grader and reward-hacking analysis, to the

Qualifications

• You’ve shipped full-stack products and owned systems from UI through storage or services.
• Experience building dense, data-facing tools such as transcript viewers, diffing systems, or operational dashboards.

Responsibilities

• Create fast, trustworthy workflows for vendors and research teams to interact with each other.
• Build review tools for inspecting and comparing rollouts, transcripts, and grader outputs.
• Develop environment-health, failure-search, versioning, and catalog experiences for training data.
• Establish a shared component kit and self-serve interfaces for creating and improving tasks with quality checks.

Skills

Full-stack development

TypeScript & React

Backend services

Data-focused tooling

Tools

Node.js

Python

Go

React

Job description

Cursor in San Francisco is seeking a Software Engineer on the RL Data team to design and build tools used by researchers and external contributors to create, review, submit, and monitor environments and tasks behind Cursor’s reinforcement-learning runs. This is a full-stack product-engineering role embedded in a research team.

You’ll own the review and acceptance experience end to end: from rollout and transcript inspection, task-quality signals grader and reward-hacking analysis, to the