Senior Application Security Engineer

Fastly Inc.•Denver, CO

64d•Hybrid

About The Position

We are looking for a Senior Application Security Engineer to join a small team that has a big impact protecting a critical piece of the Internet's infrastructure. We believe in a sensible, risk-based approach to vulnerability management, making sure we balance what's best for the business with what works for our developers. You'll be responsible for analyzing vulnerability findings and actively working with engineering teams and security tools to mitigate risk across Fastly. The team believes in the importance of the larger security community. We encourage continuous learning, speaking at conferences, and contributing to open-source projects. We are a fully distributed security team with the commitment and tools in place to make it work.

Requirements

5+ years hands-on experience implementing and running SAST, DAST, and SCA tools
Ability to implement security policies without compromising developer experience
Experience communicating complex security changes and requirements to engineering teams
Proficiency in one or more general-purpose programming languages (Rust, Ruby, Go, or Python)
Familiarity with security testing tools, such as Burp Suite and nmap
Strong networking fundamentals and knowledge of cloud-native environments and Kubernetes.

Nice To Haves

In-depth knowledge of Linux/Kernel internals, including analyzing AMD and Intel vulnerabilities
Proficiency in Rust and Terraform
Experience with offensive security, including penetration testing or red teaming

Responsibilities

Perform risk-based vulnerability assessments to prioritize critical issues
Collaborate with engineering teams to coordinate vulnerability remediation
Automate security workflows by developing custom internal tooling and scripts
Manage vulnerability-related security incidents
Build security guardrails directly into our CI/CD pipelines to proactively prevent vulnerabilities
Drive security initiatives that shape our application security program

Benefits

We offer a comprehensive benefits package including medical, dental, and vision insurance.
Family planning, mental health support along with Employee Assistance Program, Insurance (Life, Disability, and Accident), a Flexible Vacation policy and up to 18 days of accrued paid sick leave are there to help support our employees.
We also offer 401(k) (including company match) and an Employee Stock Purchase Program.
For 2025, we offer 11 paid local holidays, 11 paid company wellness days.

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