Security Engineer, Detection Engineering

• Develop detections and other analytics to identify threats across cloud, container, corporate, and edge environments.
• Lead security investigations, analyzing complex log sources and telemetry to determine root cause.
• Build AI agents and automations that speed up detection development, triage, and incident response.
• Research, evaluate, implement, and maintain a variety of custom and commercial security tools, such as EDR, SOAR, and SIEM.
• Conduct threat hunts to discover unknown malicious activity across our environment.
• Participate in our on-call rotations.

• Direct experience integrating AI tools, LLMs, and automated agents into security operations workflows to accelerate alert triage, contextualize telemetry, and speed up incident response.
• Experience developing, testing, and tuning detections using a detections-as-code approach, including version control and CI/CD.
• Proven track record of leading complex security incident investigations, with deep expertise in log analysis, real-time containment, and collecting forensic artifacts.
• Strong coding skills in Python or another general-purpose language, with experience building automations for detection and response.
• In-depth knowledge of major public cloud platforms (e.g., AWS or GCP) and Linux environments, including containers (e.g., Kubernetes), along with their native logging and security tooling.
• Solid grasp of attacker tactics and techniques, with experience in threat hunting or threat modeling to guide detection priorities.

We’ll be super impressed if you have experience in any of these:

• Familiarity with content delivery networks (CDN), edge cloud platforms, or Fastly products and services.
• Experience designing and maintaining scalable ETL processes and data pipelines to ingest, transform, and normalize security telemetry for large-scale analysis.
• Experience deploying AI agents in production to detect threats, enrich alerts, and automate response.

The estimated salary range for this position is $167,790 to $201,348., We care about you. Fastly works hard to create a positive environment for our employees, and we think your life outside of work is important too. We support our teams with great benefits that start on the first day of your employment with Fastly. Curious about our offerings?

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 2026, we offer 12 paid local holidays, 12 paid company wellness days.

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 GitHub, Yelp, Paramount, and JetBlue., Why Fastly?

• We have a huge impact. Fastly is a small company with a big reach. Not only do our customers have a tremendous user base, but we also support a growing number of open source projects and initiatives. Outside of code, employees are encouraged to share causes close to their heart with others so we can help lend a supportive hand.
• We value diversity. Growing and maintaining our inclusive and diverse team matters to us. 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. Fastly is chock full of passionate people and we’re not ‘one size fits all’. Fastly employs authors, pilots, skiers, parents (of humans and animals), makeup geeks, coffee connoisseurs, and more. We love employees for who they are and what they are passionate about.