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Senior Security Engineering

ActiveCampaign, Inc.

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 at scale. You won’t just be managing alerts; you’ll be shaping the very trajectory of our security posture in a lean, engineering-first environment.

Design and deploy sophisticated detection logic across our entire technology stack using detection-as-code principles like YARA-L, Sigma, and KQL.

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.

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 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, DevOps, or platform engineering and a history of contributing to open-source security projects.

ActiveCampaign 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.

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

We don’t just celebrate our differences, we believe our diversity is what empowers our innovation and success. When you join our team, you’ll not only have the opportunity to make a significant impact, but also enjoy a range of benefits tailored to support your personal and career development.

Comprehensive Health & Wellness: Top-tier benefits package that includes a fully-covered High Deductible Health Plan (HDHP), complimentary access to telehealth services, and a free subscription to Calm.

Access to LinkedIn Learning, professional development programs, and career growth opportunities in a fast-growing organization.

Generous 401(k) matching with immediate vesting, quarterly perks with commuter and lunch benefits for hub based employees or a stipend for remote workers, and a four-week paid sabbatical with bonus after five years.

We recruit, hire, pay, grow and promote no matter of gender, race, color, sexual orientation, religion, age, protected veteran status, physical and mental abilities, or any other identities protected by law.

Our Employee Resource Groups (ERGs) strive to foster a diverse inclusive environment by supporting each other, building a strong sense of belonging, and creating opportunities for mentorship and professional growth for their members.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. If you would like more information about how your data is processed, please contact us.

Compensation details listed in this posting reflect the base rate only and do not include bonus, equity, sales incentives or other role specific compensation that the role may be eligible for.

Vacancy posted 2 days ago
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