Fastly

Senior Engineer - Security Products (Backend APIs)

San Francisco, CA · Senior

Sponsorship not specified$181k-$217kDetected 4 days ago

Backend DevelopmentCode ReviewGitCloud PlatformsTerraformCI/CDAPI DevelopmentRESTOAuthComputer VisionAgileFirewallLeadershipCommunication

About the role

Posting Open Date: June 24, 2026 Anticipated Posting Close Date*: July 10, 2026 *Job posting may close early due to the volume of applicants.
Senior Backend Software Engineer (APIs), Security Products Some of the largest sites on the internet trust Fastly to keep them safe.

Design, ship, and own public-facing APIs and backend services in Go -from technical proposal & design docs through implementation, testing, and production rollout and on-call support.
Partner with frontend engineers, product managers, and security researchers to ship the customer experience end-to-end.
Author design and architectural documents and use them to drive alignment across engineering and product teams
Collaborate with internal platform teams, product managers, and stakeholders across the organization the understand needs and deliver impactful solutions
Consider stability, performance, and scalability in your designs and in the guidance you provide to the team
Hands-on experience designing and building reliable, large-scale backend systems - most Senior Engineers at Fastly have at least 5 years of relevant experience
You drive projects, not just tasks. You've owned a multi-week effort end-to-end: design doc through post-launch.
The Security Products Console team owns the public-facing interface they use to do it - configuring Next-Gen WAF, DDoS protection, Bot Management, and the products we're building next.
design doc through post-launch.
You design for the people downstream of your API.

5+ years shipping production Go as your primary language.
3+ years on public APIs with external consumers.
You can name a metric you added that paid off - and one you'd delete now.
We'll be super impressed if you have experience in any of these:
Working knowledge of auth at API scale (RBAC, OAuth, JWT, SAML)
A fully completed application and resume or CV are required when applying.
All job applications must be submitted through our official careers site at www.fastly.com/about/careers.

The estimated salary range for this position is 181,220 - 217,464
Starting salary may vary based on permissible, non-discriminatory factors such as experience, skills, qualifications, and location.

We support our teams with great benefits that start on the first day of your employment with Fastly.
We offer a comprehensive benefits package including medical, dental, and vision insurance.
We also offer 401(k) (including company match) and an Employee Stock Purchase Program.
For 2026, we offer 11 paid local holidays, 12 paid company wellness days.
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.

Use AI coding agents as part of your daily workflow.
What We're Looking For:
3+ years on public APIs with external consumers. You've shipped a breaking change to customers who'd already integrated against your API. You've written a deprecation notice that actually went out.
Customers deploy them during active attacks, automate them through Terraform and CI/CD, and build entire security workflows on top of them.
When the threat landscape moves, our APIs are how customers move with it.
We are committed to being a company where our employees feel comfortable bringing their authentic selves to work and have the ability to be successful -- every day.
We are passionate.

This listing is sourced directly from Fastly's careers page and normalized into a canonical job model.