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Staff Engineer - PKI Systems at Fastly | Multiple Locations

Fastly, Inc.Denver, CO; New York City, NY; San Francisco, CA
On-site Full-time $211.4K/yr - $253.6K/yr

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Experience Level

Mid to Senior

Qualifications

Key Responsibilities:Lead the design and implementation of security-critical PKI infrastructure, overseeing major refactors and new capabilities. Manage cryptographic operations including key ceremonies, credential management, and multi-datacenter failover processes. Formulate technical strategies for system hardening, automation, and resilience across ephemeral, containerized microservices and HSM environments. Investigate and resolve complex engineering problems and production incidents, creating proof-of-concepts and conducting root cause analyses with an emphasis on security, automation, observability, and stability. Collaborate closely with TLS clients, SRE, Security, and Product Engineering teams to translate intricate business demands and compliance requirements (WebTrust, PCI) while evolving our infrastructure. Mentor team members, nurturing a culture of technical excellence, and providing guidance on design, performance, and security best practices.

About the job

At Fastly, we empower individuals to connect more effectively with their passions. Our cutting-edge edge cloud platform allows clients to rapidly, securely, and reliably create outstanding digital experiences by processing, serving, and safeguarding their applications close to end-users—right at the edge of the Internet. Designed to leverage the modern internet's capabilities, our platform is adaptable and supports agile software development. We proudly serve a diverse clientele, including industry leaders such as GitHub, Yelp, Paramount, and JetBlue.

Join us in our mission to build a more secure and trustworthy Internet.

Posting Open Date: Feb. 9, 2026

Anticipated Posting Close Date*: March 2, 2026

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

 

Role Overview:

As a Staff PKI Systems Engineer, you will be instrumental in building and operating Certainly, Fastly's publicly-trusted TLS certification authority. Utilizing Boulder, the same open-source technology behind Let's Encrypt, Certainly delivers widely trusted, short-validity certificates at scale, enhancing internet security. You will take charge of the architecture and operational excellence of complex PKI systems while mentoring a dedicated team of engineers. By integrating extensive security knowledge with software development, you will tackle intricate, internet-facing engineering challenges to ensure compliance with strict industry standards and reliability goals. This high-impact role ensures that your designs directly safeguard Fastly's clientele and the wider web.

About Fastly, Inc.

Fastly is a leading edge cloud platform that empowers businesses to deliver exceptional digital experiences with speed and security. Our innovative technology supports agile software development and is utilized by top-tier companies across various industries, establishing Fastly as a trusted partner in the digital landscape.

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