Principal Engineer - Customer Identity Access Management; CIAM

Principal Software Engineer – Customer Identity Access Management (CIAM)

Join our dynamic Customer Identity Access Management (CIAM) team as a Principal Software Engineer and play a pivotal role in building cutting‑edge solutions that centralize and simplify how organizations manage user identities and profile data.

• Lead the technical direction, architecture, and evolution of Fastly’s CIAM systems and services.
• Design and build secure, scalable solutions for authentication, authorization, identity lifecycle, and related platform capabilities.
• Partner with engineering, product, and security teams to define roadmaps, align priorities, and address technical risks early.
• Drive adoption of modern, standards‑based identity patterns and best practices across teams and systems.
• Improve the reliability, security, and maintainability of identity‑related services through strong architectural decisions and operational rigor.
• Mentor engineers across the organization, helping raise the quality of technical design, implementation, and collaboration.
• 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; most Principals at Fastly have at least 10 years of related 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 lead complex technical initiatives across multiple teams and influence engineering direction at senior levels.
• Strong written and verbal communication skills, including the ability to produce clear technical documentation and align diverse stakeholders.
• Track record of mentoring and growing other engineers, both within your domain of expertise and more broadly across engineering.

• Experience with Keycloak
• Production experience implementing role‑ and attribute‑based access control systems
• Experience with Go, Java, or Ruby

This position will require availability during core business hours and occasional nights and weekends as needed for on‑call support.

The preferred hybrid locations for this position are:
San Francisco, CA
Denver, CO
New York, NY Fastly currently embraces a largely hybrid model for most roles. We also consider highly qualified remote candidates within the United States. Travel is required as directed by your manager.

The estimated salary range for this position is $246,550 to $295,000, based on experience, skills, qualifications, and location. This role may be eligible for Fastly’s equity and discretionary bonus programs.

Fastly offers a comprehensive benefits package including medical, dental, and vision insurance; family planning, mental health support, and employee assistance program; life, disability, and accident insurance; an open vacation policy; up to 18 days of accrued paid sick leave; 401(k) with company match; employee stock purchase program; and 11 paid local holidays with 12 paid company wellness days in 2026.

Fastly is committed to ensuring equal employment opportunity and to providing employees with a safe and welcoming work environment free of discrimination and harassment. Our employment decisions are based on business needs, job requirements and individual qualifications.

All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, family or parental status, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances.

Consistent with the Americans with Disabilities Act (ADA) and federal or state disability laws, Fastly will provide reasonable accommodations for applicants and employees with disabilities. If a reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact the Fastly Employee Relations team at candi or 501‑287‑4901.

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