Senior Principal Engineer - Platform Engineering

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 Git Hub, Yelp, Paramount, and Jet Blue.

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

Posting Open Date: Feb 23, 2026

Anticipated Posting Close Date: March 23, 2026.

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

Fastly’s Platform Engineering team builds the foundations that enable engineers to ship quickly, safely, and reliably  a Senior Principal Engineer, you will set technical direction and lead cross‑organizational initiatives that strengthen our platform, developer experience, and operational excellence. You’ll partner closely with Engineering peers to remove friction, standardize best practices, and deliver paved roads that accelerate product teams. This highly cross‑functional and hands‑on role represents the Platform Engineering org, reporting to the Senior Director of Engineering.

• Lead architecture and technical direction for Platform Engineering initiatives spanning build, deploy, runtime, observability, security and developer experience.
• Partner with Engineering, SRE, Security, and Product teams to align roadmaps, priorities, and success metrics across the company.
• Drive cross‑org programs from concept to delivery (e.g., service templates/golden paths, CI/CD modernization, reliability and cost efficiency improvements).
• Define and evolve platform standards (APIs, operational readiness, SLOs/SLAs, incident learnings) and ensure adoption through tooling and enablement.
• Mentor and amplify senior engineers and tech leads; raise the bar for design reviews, technical writing, and engineering rigor.
• Communicate progress, risks, and decisions clearly to stakeholders and leadership; represent Platform Engineering in technical forums.

• 12+ years of professional software engineering experience, including designing and operating distributed systems in production.
• Demonstrated success leading complex, cross‑functional technical initiatives with broad organizational impact.
• Deep expertise in at least two of the following: cloud infrastructure, Kubernetes/container platforms, CI/CD systems, networking/service connectivity, observability, security, developer tooling.
• Strong systems design and architecture skills with a pragmatic approach to tradeoffs, risk management, and incremental delivery.
• Excellent written and verbal communication; ability to influence without authority and align diverse stakeholders.
• Commitment to building diverse and inclusive teams and an environment where engineers can do their best work.

• Building internal developer platforms or “paved roads” at scale (e.g., service catalogs, self‑service infrastructure, standardized delivery pipelines).
• Background in high‑performance networking/edge/CDN systems or globally distributed traffic platforms.
• Strong SRE practices: SLOs, error budgets, incident response, and continuous improvement loops.
• Experience with infrastructure‑as‑code (e.g., Terraform), policy‑as‑code, and security automation.
• Track record of driving adoption through enablement: docs, workshops, office hours, and partner engagement.

• This position requires availability during core business hours and occasional nights and weekends 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 which allows employees flexibility to split their time between the office and home. We are also willing to consider highly qualified remote candidates in the United…