Principal Engineer, Fastly

• You have at least 10 years of production experience as a software engineer with at least 5 of those working on networked/distributed/cloud systems at scale
• You have at least 3 years of experience with C or Rust and an affinity for using the right tool for the job
• Ability to participate in and help coordinate incident response and mitigation
• Motivated to identify pain points in existing workflows and create solutions via tools and automation
• Formal CS education is not required; demonstrable experience is sufficient

Desirable

• The Edge Delivery team maintains Varnish, Fastly’s core caching platform, as well as adjacent services and tooling. Leveraging C and Rust in different codebases, the team develops a highly-scalable service platform which is responsible for meeting the ever-growing and changing requirements of Fastly's diverse customer base
• We are looking for a Principal Software Engineer to join this critical team and help it evolve to scale our CDN, compute & security infrastructure
• This role will make hands-on contributions to the codebase, propose and design improvements to Varnish subsystems, and work as a technical leader with other team members and cross-functionally across the engineering organization
• Write C and Rust code to meet the demands of Fastly’s diverse customer base
• Deliver improvements to HTTP protocol support, caching storage and customer logic execution areas in Varnish, and integrate with libraries and services operated by other teams
• Technical leadership of full lifecycle projects, driving project progress and communicating project status to stakeholders
• Coordinate and communicate seamlessly with the team members and across other technical and cross functional teams
• Analyze and address performance, correctness and stability issues to ensure that Varnish always meets Fastly's exacting standards of excellence
• Contribute to code reviews, improving the codebase and other team processes
• Mentor and support the professional growth of engineers, fostering a culture of knowledge sharing, innovation, and collaboration within the team
• Participate in on-call rotation
• This position will require you to be available during core business hours and occasional nights and weekends as needed for on-call support

• Posting Open Date: May 8, 2025
• Anticipated Posting Close Date*: June 9, 2025
• Job posting may close early due to the volume of applicants