Software Engineer, Core Services

About this role

Cursor is seeking a Software Engineer for the Core Services team to build and maintain critical backend infrastructure powering their AI-driven code automation platform. You'll own authentication systems, webhooks, and agent workflow backends that support millions of developers, focusing on reliability, performance, and clean abstractions.

What you'll do

• Design and implement scalable authentication architecture for a widely-used developer tool
• Own agent backend infrastructure, optimizing for end-to-end performance and reliability
• Build robust webhook server with high-throughput event delivery and proper retry semantics
• Develop resilient abstractions over source control providers and third-party integrations
• Partner with client and inference teams to improve multi-step agent workflows
• Own the full lifecycle of production services from design through operation

What they're looking for

• Backend service architecture and operations
• Authentication/authorization (OAuth, JWTs, RBAC)
• Event-driven architectures and webhook systems
• Agentic systems and complex multi-step workflows
• API design and clean abstractions
• Production service reliability and performance optimization
• Database and infrastructure design
• Source control system integration