Staff Software Engineer - Customer Identity & Access Management (CIAM)

Fastly helps people stay better connected with the things they love. Fastly’s edge cloud platform enables customers to create great digital experiences quickly, securely, and reliably by processing, serving, and securing our customers’ applications as close to their end-users as possible — at the edge of the Internet. The platform is designed to take advantage of the modern internet, to be programmable, and to support agile software development. Fastly’s customers include many of the world’s most prominent companies, including GitHub, Yelp, Paramount, and JetBlue.

We're building a more trustworthy Internet. Come join us.

Posting Open Date: 08/19/2026

Anticipated Posting Close Date*: 09/17/2026

*Job posting may close early due to the volume of applicants.

Staff Software Engineer - Customer Identity Access Management (CIAM)

Join our dynamic Customer Identity Access Management (CIAM) team as a Staff Software Engineer and play a pivotal role in building cutting-edge solutions that centralize and simplify how organizations manage user identities and profile data. Our CIAM team is committed to empowering customers with control over user access by providing advanced access control mechanisms, innovative authentication methods, progressive profiling, and a unified identity experience.

We are looking for passionate, highly skilled software engineers to join our team and be an integral part of our mission. If you're eager to make a significant impact and contribute to the growth of a thriving CIAM ecosystem, we would love to have you on board. Let's build something remarkable together!

• Design and build secure, scalable identity services supporting authentication, authorization, identity lifecycle, and related platform capabilities.

• Lead implementation of complex technical initiatives from design through production, balancing long-term architecture with practical delivery.

• Serve as the technical lead for one or more core areas of the CIAM platform, guiding architecture, reviewing designs, and helping teams make sound technical decisions.

• Partner with engineering, product, and security to shape implementation plans, prioritize technical investments, and identify risks early.

• Break down ambiguous technical problems into practical, incremental solutions while maintaining a high bar for engineering quality.

• Champion modern, standards-based identity patterns and help teams adopt engineering best practices across the CIAM platform.

• Improve the reliability, security, and maintainability of identity-related services through strong architectural decisions and operational rigor.

• Mentor engineers within the CIAM organization through design reviews, technical guidance, and collaborative problem solving.

• Contribute to an inclusive engineering culture grounded in curiosity, pragmatism, and continuous improvement.

• Participate in on-call support rotation as needed.

• Significant experience designing and operating authentication and authorization systems in production environments. Staff engineers at Fastly typically have 7+ years of relevant experience.

• Deep understanding of identity and access standards and technologies such as OIDC, OAuth, SAML, SCIM, JWT, and SSO.

• Experience with service-to-service authentication and secure communication patterns in distributed systems.

• Strong background in software architecture and system design, especially in areas of scalability, performance, reliability, and security.

• Demonstrated ability to provide technical leadership across multiple teams through architectural guidance, delivery of complex initiatives, and collaborative