Overview
In this Senior Security Engineer role, you will strengthen Klaviyo’s Detection & Response (D&R) capabilities across enterprise, cloud, and product environments. You’ll develop detections, drive investigations, and automate D&R workflows at scale, collaborating with a cross-functional team to advance AI-first security initiatives. The position blends engineering, threat hunting, and incident response to prevent repetitive work and improve security outcomes. You’ll work with diverse regions and on-call rotations, shaping security tooling and data-driven defense.
Pay / Benefits
- annual cash bonus plan
- equity
- sign-on payments
- health benefits
- welfare and wellbeing benefits
- competitive compensation
Responsibilities
- Develop, test, and deploy detections-as-code with high fidelity (rule-based and anomaly-based)
- Detect and respond to cyber threats using security data lake, SIEM, and cloud platforms
- Lead end-to-end incident response investigations and digital forensic activities
- Automate and codify D&R workflows and processes
- Build security tooling to automate the D&R lifecycle
- Improve maintenance of detection and response pipelines and underlying systems
- Collaborate with Threat Intelligence to identify sophisticated threats
- Develop AI-first security systems to automate detection and response
- Conduct threat hunts across corporate, cloud, and product environments
- Support data engineering workflows for security data lake and SIEM platforms
- Participate in D&R on-call rotations
- Coach and mentor security engineers within the team
Key requirements
- 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)
- Proven experience with git/GitHub and CI/CD automations
- Familiarity with TTPs used by threat actors
- Experience on-call in detection/response or incident response
- Engineering-first and AI-first approach to work
- Strong learning mindset and ongoing tech updates
- Strong oral and written communication skills
- Team player with self-managing work ethic
- strong communication
- team player
- self-motivated and autonomous
- detections-as-code
- SIEM
- security data lake
Senior Security Engineer - Detection & Response in London employer: Klaviyo
Klaviyo is an exceptional employer that champions inclusivity and diversity, making it a vibrant workplace for all Klaviyos. With a strong focus on employee growth, mentorship opportunities, and a supportive work culture, Klaviyo empowers its team members to thrive in their careers while enjoying a hybrid working model in the heart of London. The company offers competitive compensation packages and a commitment to fostering a collaborative environment where every voice is valued.
