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Senior Detection Engineer

ActiveCampaign - United States

Posted Feb 6, 2026

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About this role

Senior Detection Engineer United States On a typical day, you might: - Design and deploy sophisticated detection logic across our entire technology stack using detection-as-code principles like YARA-L, Sigma, and KQL. - Build automated response workflows that independently enrich, triage, and remediate security alerts, effectively eliminating manual toil through advanced SOAR principles. - Investigate complex security signals -such as novel attack patterns or phishing campaigns-that require deep human judgment and strategic intuition. - Collaborate cross-functionally with DevOps and Security Engineering teams to adapt detection logic to infrastructure changes before security blind spots can emerge. - Leverage AI and LLMs as force multipliers to accelerate threat hunting, generate new detection hypotheses, and automate repetitive investigative tasks. - Lead post-incident reviews with engineering partners, transforming security findings into preventative architectural changes that harden our long-term defense. - Prototype and test emerging detection capabilities and data sources, ensuring we stay ahead of the threat landscape while participating in an on-call rotation to defend our most critical systems. What is needed: - 5+ years of hands-on experience in detection engineering, incident response, or security operations within high-growth technology environments. - Advanced programming proficiency in Python , with a proven ability to build production-quality security automations and custom integrations from scratch. - Deep expertise in Cloud Security (AWS) , including a comprehensive understanding of IAM, VPC, CloudTrail, and Lambda attack vectors. - Mastery of detection logic in at least two major languages, such as YARA-L, Sigma, KQL, or SPL. - A track record of building

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