[Remote] Senior Security Engineer - Detection Engineering

Note: The job is a remote job and is open to candidates in USA. Fastly is hiring a Senior Security Engineer on its Detection Engineering team to build detections and lead investigations across the company’s environment. The role develops AI agents and security automations, conducts threat hunts, and implements and maintains security tools.

Responsibilities

• 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

Skills

• 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
• 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

Benefits

• This role may be eligible to participate in Fastly’s equity and discretionary bonus programs.
• Medical, dental, and vision insurance.
• Family planning support.
• Mental health support along with Employee Assistance Program.
• Life, disability, and accident insurance.
• Flexible Vacation policy.
• Up to 18 days of accrued paid sick leave.
• 401(k), including company match.
• Employee Stock Purchase Program.
• For 2026, 12 paid local holidays and 12 paid company wellness days.
• Fastly currently embraces a largely hybrid model for most roles, allowing employees flexibility to split their time between the office and home; remote candidates within the US may be considered.

Company Overview

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