Software Engineer, Core Services

The role

This backend role sits within the Core Services group, which builds shared services that Cursor's product teams rely on. The engineer owns authentication, webhook delivery, and the backend logic that drives agent features, with an emphasis on reliability and clean interfaces.

What you would do

• Design and build a scalable authentication architecture for a widely used developer product
• Run and tune the backend behind Cursor's agent workflows to improve speed and dependability
• Create a high-volume event delivery service with retry handling, failed-message queues, and monitoring
• Build fault-tolerant wrappers around third-party source control providers
• Work with client and inference teams to shorten the path from user action to agent response
• Take ownership of production services across their full lifecycle

What they asked for

• Hands-on experience running critical backend services, especially identity, API gateways, or event delivery
• Understanding of multi-step agentic systems and firm views on their reliability and performance
• Focus on clean abstractions and well-defined service contracts that other engineers can build on
• Solid software engineering fundamentals and comfort owning production systems end to end

Nice to have

• Experience with OAuth, JWTs, or role-based access control
• Background in event-driven architectures
• Experience building developer-facing platform services