Hybrid Senior Security Engineer, Detection & Response

at Aircall

• Job title: Senior Security Engineer, Detection & Response
• Job type: Full Time
• Experience level: Senior
• Salary: $165,000 - $210,000 per year
• Degree requirement: Bachelor's Degree
• Tech skills: Ansible, AWS, Azure, Cloud, ElasticSearch, Google Cloud Platform, Python, Splunk, Terraform, Go
• Location requirements: Hybrid, Seattle, United States

About the role

• Senior Security Engineer developing, scaling, and evolving threat detection and response capabilities for Aircall. Leading investigations and driving the maturity of detection programs.

Responsibilities

• Lead end-to-end development of detection logic: from threat modeling and hypothesis to writing, testing, tuning, and deploying detection rules and alerts (across logs, telemetry, host, network, cloud).
• Build detection pipelines, orchestration, triage logic, and automation for alert handling and response (e.g. SOAR, playbooks).
• Conduct threat hunts proactively in corporate and production environments, discovering anomalies and attacker behaviors before they escalate.
• Lead incident response: investigate, contain, remediate, and perform root cause analysis. Drive post-incident reviews and feed lessons learned back into detection strategy.
• Assess and fill gaps in visibility—work with engineering teams to ensure logging, instrumentation, and context are sufficient to detect relevant threats.
• Evolve detection maturity: turn simple signature-based alerts into more advanced behavioral, statistical, ML-driven, and adversary-informed detections, in line with detection engineering maturity models.
• Author and maintain detection documentation, runbooks, alert definitions, tuning guidelines, and metrics.
• Collaborate cross-functionally (Engineering, Product, Fraud, Privacy and Legal) to align detection and response work with product lifecycles and system architecture.
• Be part of on-call rotations or threat-response rotations; escalate, coordinate, and remove blockers during high-severity events.
• Stay up to date on attacker techniques (MITRE ATT&CK, red team reports, threat intel) and propose new detection patterns or responses accordingly.
• Participate in hiring, interview evaluation of Security and Infrastructure engineering candidates, and team growth.

Requirements

• 5+ years of hands-on experience in security operations, detection engineering, incident response, threat hunting, or similar fields (or equivalent combination).
• Deep knowledge of adversarial tactics, techniques, and procedures (TTPs), threat actor behavior, kill-chain or MITRE ATT&CK framework.
• Proven experience building detections from scratch (versus just tuning commercial alerts)—i.e. you can turn a hypothesis or a threat intel indicator into a production-quality detection with low false positive rate.
• Hands-on experience with SIEM or log analytics platforms (e.g. Elasticsearch, Splunk, Datadog, AWS Athena, OpenSearch or equivalent), and alerting/monitoring tooling.
• Proficiency with a programming or scripting language (e.g. Python, Go, or similar along with IaC - Terraform, Ansible) to build detection pipelines, automations, triage logic, or tooling
• Experience in digital forensics, host-based detection, endpoint telemetry, process/network visibility, cloud observability (logs, metrics, traces).
• Comfortable working in cloud-first environments (AWS, GCP, Azure) and instrumenting detection across cloud workloads, containers, serverless, etc.
• Experience responding to incidents (investigating logs, creating timelines, root cause, containment) in production environments.
• Familiarity with security automation / orchestration (SOAR), playbooks, response automation, and alert triage workflows.
• Strong communication skills; ability to translate complex detection logic, trade-offs and risk to engineers and leadership.
• High degree of autonomy, initiative, and ownership; ability to drive entire initiatives with minimal oversight.

Benefits

• Medical, dental, and vision insurance is 100% covered
• 401k plan with company matching!
• Unlimited PTO — take the time you need to come to work feeling great!
• Wellness, internet, and childcare reimbursements
• Generous parental leave policy