Note: The job is a remote job and is open to candidates in USA. Anysphere is building tools to automate coding, beginning with Cursor, a developer tool designed for professional programmers through research, design, and engineering. The Software Engineer on the Core Services team will own critical backend services including authentication, agent infrastructure, webhooks, source control integrations, and end-to-end reliability. The role focuses on building scalable, reliable, well-abstracted production systems that support the company’s product teams and AI-powered development workflows.
Responsibilities
- Owning authentication: designing and implementing a scalable auth architecture that secures one of the most widely-used developer tools in the world
- Powering the agent backend: owning the infrastructure behind Cursor's agent workflows, optimizing for end-to-end performance and reliability as agents become central to the developer experience
- Building a robust webhook server: handling high-throughput event delivery with proper retry semantics, dead-letter queues, and observability so external integrations just work
- Hardening SCM integrations: building resilient abstractions over source control providers so Cursor stays rock-solid regardless of third-party conditions
- Driving end-to-end agent reliability: partnering with the client and inference teams to improve the full path from user action to agent response, closing the loop on one of the hardest problems in AI-powered development
Skills
- Experience building and operating critical backend services, especially auth systems, API gateways, or webhook infrastructure
- Experience working on agentic products or infrastructure
- Strong opinions on reliability and performance of complex multi-step systems
- Care deeply about clean abstractions and well-defined service contracts
- Strong software engineering fundamentals
- Enjoy owning the full lifecycle of production services
- Experience with authentication/authorization frameworks (OAuth, JWTs, RBAC)
- Experience with event-driven architectures
- Experience building developer-facing platform services
Benefits
- Full-time employment
- Remote work arrangement
Company Overview
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