Software Engineer, Core Services & Auth

Cursor; California (MO); On-site; USD 120,000 - 170,000; Full time

Job summary

Cursor is redefining how developers write code by building core backend services that power authentication, webhooks, and agent workflows. You will own the critical systems that sit between product surfaces and the infrastructure layer, ensuring reliability and well-abstracted interfaces.

As a Software Engineer on the Core Services team, you will design and operate authentication as well as webhook infrastructure, aiming for scalable, observable, and high-performance backend services that enable

Qualifications

• Experience building and operating critical backend services.
• Experience with authentication/authorization frameworks (OAuth, JWTs, RBAC).
• Strong backdrop in designing reliable, scalable systems and clean abstractions.

Responsibilities

• Own authentication and authorization systems and API gateways.
• Build and operate webhook infrastructure with high reliability and observability.
• Strengthen end-to-end agent workflows and SCM integrations for reliability.
• Collaborate with product and infra teams to deliver robust backend services.
• Drive the full lifecycle of production services with a focus on performance.

Skills

Auth systems

API gateways

Webhook infrastructure

Reliability

Performance

Abstractions

Service contracts

Production services

OAuth

JWTs

Job description

Cursor is redefining how developers write code by building core backend services that power authentication, webhooks, and agent workflows. You will own the critical systems that sit between product surfaces and the infrastructure layer, ensuring reliability and well-abstracted interfaces.

As a Software Engineer on the Core Services team, you will design and operate authentication as well as webhook infrastructure, aiming for scalable, observable, and high-performance backend services that enable