Software Engineer, RL Data
Cursor · On-site
MeritLog read this listing from Cursor's Ashby job board and last checked it on September 9, 2026.
Source: the employer's Ashby job board. Open the original listing for current details.
Job details
- Work model
- On-site
- Salary
- Not listed by source
- Location
- San Francisco
- Occupation
- Software Developers(O*NET 15-1252.00)
- Company website
- cursor.com
Hiring context
How this role compares at Cursor
Cursor has 124 live roles in MeritLog’s catalog across 8 job families, and 8 of them are in data & analytics. 0 of those listings publish a pay range, a disclosure rate of 0%.
Cursor concentrates this hiring in:
Counted across the job boards MeritLog tracks, at the time this page was served. Pay comparisons use only listings that publish a complete range in the same currency and period.
What the role asks for
What you'd do
- Designing a task set that teaches a specific agent capability, then iterating on it from traces and evals until the model actually gets better.
- Reading a pile of agent traces, finding a failure mode or a surprising behavior, and building a system that surfaces more of the same.
- Turning a one-off recipe into something other teams can reuse: better rewards, cleaner environments, tighter data quality.
- Partnering with research on whether a dataset is actually teaching the thing we think it is.
- You write careful, fast code and have strong software engineering fundamentals.
- You like setting tasks: breaking a fuzzy capability into something concrete you can measure.
- You have an infra, data, or distributed systems background. RL experience is a plus, not a requirement.
- You enjoy looking at messy real-world agent behavior and turning it into a dataset or a tool.
Parsed by MeritLog from the employer’s own posting. The full description follows below.
Job description
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 small and talent dense. We particularly like people who are truth-seeking, passionate, and creative. We enjoy spirited debate, crazy ideas, and shipping code. SOFTWARE ENGINEER, REINFORCEMENT LEARNING Cursor is building the future of coding. We train frontier coding agents https://cursor.com/blog/composer and scale RL on real user data to make them increasingly effective. ABOUT THE ROLE As a Software Engineer on the RL Data team at Cursor, you'll create the tasks, rewards, and environments that train our coding agents. The team owns the data that goes into training: what the model is asked to do, how we score it, and the setups it learns in. WHAT YOU’LL DO - Designing a task set that teaches a specific agent capability, then iterating on it from traces and evals until the model actually gets better. - Reading a pile of agent traces, finding a failure mode or a surprising behavior, and building a system that surfaces more of the same. - Turning a one-off recipe into something other teams can reuse: better rewards, cleaner environments, tighter data quality. - Partnering with research on whether a dataset is actually teaching the thing we think it is. YOU MAY BE A FIT IF - You write careful, fast code and have strong software engineering fundamentals. - You like setting tasks: breaking a fuzzy capability into something concrete you can measure. - You have an infra, data, or distributed systems background. RL experience is a plus, not a requirement. - You enjoy looking at messy real-world agent behavior and turning it into a dataset or a tool.
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