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Senior Security Engineer - Detection & Response

Klaviyo
London, UK Full Time GBP 84,000 - 126,000 p.a. Sep 23, 2026

About the Job

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a cl...

Klaviyo is looking for a Senior Security Engineer to add to our growing Detection & Response Team. This is an engineering role that spans the full detection and response lifecycle - leveraging software development practices to build detections, triaging alerts, lead investigations, respond to incidents, perform thre...

Leverage engineering practices to develop, test, and deploy high-fidelity rule-based and anomaly-based detections-as-code

Required Skills & Abilities

 
5+ years of hands-on security experience in modern cloud environments
Experience in triaging and responding to cyber threats
Experience in large-scale log analysis, incident response and/or digital forensics
Experience with centralized security data lakes and SIEM solutions
Hands-on experience in writing detections-as-code
Solid data querying skills (e.g. SQL, Splunk) 
Familiarity with large-scale data pipelines and data engineering techniques 
Proficient in programming languages to automate / build (e.g., Python, Go or similar)
Proven experience with git/GitHub and CI/CD automations 
Familiarity with tactics, techniques, and procedures used by threat actors
Experience being part of detection and response or incident response on-call 
Engineering-first and AI-first approach for all work performed
Strong passion for continuous learning and staying updated on evolving technology 
Strong oral and written communication skills
Team player with a strong, self-managing work ethic

 
Our salary range reflects the cost of labour in the country where the job post is advertised. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. 
Your recruiter can provide more details about the specific salary/OTE  range for your preferred location during the hiring process.

Qualifications

Experience: 5 years experience

Apply now

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