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Senior Detection Engineer

Job in Chicago, Cook County, Illinois, 60290, USA
Listing for: ActiveCampaign
Full Time position
Listed on 2026-02-11
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 100000 - 125000 USD Yearly USD 100000.00 125000.00 YEAR
Job Description & How to Apply Below

As our next Senior Detection Engineer
, you won’t just be monitoring dashboards—you’ll be at the forefront of building our security operations as code. You will lead the charge in architecting scalable detection systems and developing the automation that defines how we protect our infrastructure. This is a technical, hands-on role combining security engineering, automation development, and strategic incident response where your technical decisions directly shape how we detect, investigate, and respond to threats  won’t just be managing alerts;

you’ll be shaping the very trajectory of our security posture in a lean, engineering-first environment.

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 Dev Ops 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, Cloud Trail, 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 SOAR workflows or equivalent automation platforms that measurably reduce operational overhead at scale.
  • Exceptional communication skills, with the ability to distill complex security risks into actionable insights and influence technical decisions across the organization.
  • Experience using AI/LLMs as a strategic tool for threat analysis, investigation automation, and increasing the velocity of security work.
  • A self-directed, engineering-first mindset, ideally with a background in SRE, Dev Ops, or platform engineering and a history of contributing to open-source security projects.
About Active Campaign

Active Campaign is the autonomous marketing platform for people at the heart of the action. It empowers teams to automate their campaigns with AI agents that imagine, activate, and validate—freeing them from step-by-step workflows and unlocking limitless ways to orchestrate their marketing.

With AI, goal-based automation, and 1,000+ app integrations, agencies, marketers, and owners can build cross-channel campaigns in minutes—fine-tuned with billions of data points to drive real results for their unique business.

Active Campaign is the trusted choice to help businesses unlock a new world of boundless opportunities—where ideas become impact and potential turns into real results.

As a global multicultural company, we are proud of our inclusive culture which embraces diverse voices, backgrounds, and perspectives. We don’t just celebrate our differences, we believe our diversity is what empowers our innovation and success. You can find out more about our DEI initiatives here.

Perks And Benefits

At Active Campaign, we prioritize employees’ well-being and professional growth by cultivating a culture centered on collaboration and innovation. When you join our team, you’ll not only…

Position Requirements
10+ Years work experience
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