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.

We're building a more trustworthy Internet. Come join us.

Posting Open Date: May 7, 2026

Anticipated Posting Close Date*: June 7, 2026

*Job posting may close early due to the volume of applicants.

Senior Security Engineer, Detection Engineering

As a Senior Security Engineer on our Detection Engineering team, you will develop detections to identify potentially malicious activity and support the investigations of security incidents across the Fastly environment. We are looking for a teammate with foundations in security engineering and experience in security incident response and detection development. In this role, you will have the opportunity to mature our detection lifecycle, develop advanced detections, build automations, and support security investigations.

What You'll Do:

Develop detections and other analytics to identify threats across cloud, corporate, and edge environments.
Lead security investigations and perform deep-dive analysis across complex log sources and telemetry to identify root causes.
Research, evaluate, implement, and maintain a variety of custom and commercial security tools, such as EDR, SOAR, and SIEM.
Build custom tooling and automations to improve the detection lifecycle and security incident response.
Develop and maintain incident response playbooks and other detection and response documentation.
Conduct threat hunts to discover unknown malicious activity across our environment.
Participate in our on-call rotations.

What We're Looking For:

Expertise in performing security incident investigations and conducting deep-dive log analysis across enterprise environments to identify, mitigate, and remediate cyber threats.
Experience developing high-fidelity detections-as-code.
Experience translating threat intelligence reports into actionable detection logic and threat hunts.
Strong programming ability in one or more general purpose languages (preferably Python)
Experience in securing, identifying threats, and responding to incidents in one major public cloud infrastructure, such as Amazon Web Services (AWS) or Google Cloud Platform (GCP).

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 using AI to enhance detection logic and investigating AI-generated or assisted security threats.
Experience designing and maintaining scalable ETL processes and data pipelines to ingest, transform, and normalize security telemetry for large-scale analysis.

Work Hours:

This position will require you to be available during core business hours and support an on-call rotation.

Work Location(s) & Travel Requirements:

The preferred locations for this position are:

New York, NY
San Francisco, CA
Denver, CO
Remote, USA

Fastly currently embraces a largely hybrid model for most roles which allows employees flexibility to split their time between the office and home.

There is a preference for Hybrid near a local office. However, we may be willing to consider remote candidates within the US.

This position may require travel as required by your role or requested by your manager.

SF / LA Fair Chance Ordinance Statement

Pursuant to the San Francisco Fair Chance Ordinance and the Los Angeles Fair Chance Initiative for Hiring Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Salary:

The estimated salary range for this position is $181,220 to $217,464.

Starting salary may vary based on permissible, non-discriminatory factors such as experience, skills, qualifications, and location.

This role may be eligible to participate in Fastly’s equity and discretionary bonus programs.

Benefits:

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.

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.

We’re always looking for humble, sharp, and creative folks to join the Fastly team. If you think you might be a fit please apply! 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. We will never request sensitive information, such as your Social Security number, bank account or credit card information during the application process. All official communication will come from an @fastly.com or @recruiting.fastly.com email address.

Fastly is committed to ensuring equal employment opportunity and to providing employees with a safe and welcoming work environment free of discrimination and harassment. Our employment decisions are based on business needs, job requirements and individual qualifications. All qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, family or parental status, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws, regulations and ordinances.

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. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact your Recruiter, or the Fastly Employee Relations team at candidateaccommodations@fastly.com or 501-287-4901.

Fastly collects and processes personal data submitted by job applicants in accordance with our Privacy Policy. Please see our privacy notice for job applicants.