Skills & Technologies
Joblaze summary
In the role of Software Engineer on the Agent Harness team at Cursor, the individual will focus on developing core functionalities that enhance agent experiences across various products. Key skills include strong software engineering fundamentals and experience with complex agentic systems, as well as a keen understanding of model behaviors and user needs. This position is ideal for someone with a background in building infrastructure for AI products and a passion for innovative coding solutions. Cursor's flat organizational structure fosters a collaborative environment where creative ideas and spirited discussions are encouraged.
Joblaze insights
- Listed about a month ago on Joblaze — tracked directly from Cursor's career page.
- Cursor has 85 other open roles including Marketing Program Manager, Workshops, Solutions Architect, London, Solutions Architect.
- 1579 active AI/ML roles on Joblaze right now.
- 43 active Software Engineering roles on Joblaze right now.
Quick facts
- Is the Software Engineer, Agent Harness role remote?
- It's hybrid — Cursor expects some on-site time in San Francisco.
- Where is the role based?
- Cursor is hiring for this position in San Francisco.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: AI/ML, Software Engineering.
- What seniority level is this role?
- Cursor targets mid-level candidates for this position.
- Is this full-time or contract?
- Full-time for this Software Engineer, Agent Harness role at Cursor.
From the original posting
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.
About the Role
As a Software Engineer on the Agent Harness team at Cursor, you’ll build the core agent behavior and capabilities that power agent experiences across Cursor products. This spans agent orchestration, tools, guardrails, and model behavior tuning—designed as a platform that Cursor engineers can extend and depend on.
Your work will also define the default Cursor agent experience (”Auto”), where users trust us to make the right model choices under real-world constraints.
Example projects include:
Advancing the agent harness (agent loop, tools, prompts, execution environment, capabilities) used across Cursor products. This would shape and empower experiences like multi-agent coordination.
Improving the default Cursor agent experience (the “Auto” model setting): making smart model choices based on user needs, model capabilities, and cost appetite.
Shaping the default Cursor agent’s personality.
Launching new models on Cursor end-to-end — partnering with foundational model providers and our research team on integration, evaluation, and rollout.
You may be a fit if
You have built complex agentic products or infrastructure.
You have strong software engineering fundamentals and enjoy shipping production systems.
You have taste and strong opinions on model and agent behaviors. You stay up-to-date and informed on emerging research and industry trends.
You make good calls in the gray area: weighing data, user experience, and product taste when there isn’t a single “right” answer.
Experience building eval datasets or frameworks to understand and improve the performance of AI systems is a plus.
Experience building products or tools used by other engineers is a plus.
Applying
If there appears to be a fit, we'll reach to schedule 2-3 short technicals. After, we'll schedule an onsite in our office, where you'll work on a small project, discuss ideas, and meet the team.
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