Security Engineer (Detection and Response)

Notion; Dublin; On-site; EUR 127,000 - 142,000; Full time

Job summary

Notion is seeking a hands-on Detection Engineer to enhance and operate detection systems across its cloud-native environment in Dublin, Ireland. This role involves developing high-signal detections, improving platforms, and participating in incident response operations.

The ideal candidate should have at least 6 years of relevant experience and strong skills in detection languages, cloud security, and SIEM platforms, contributing to Notion's mission of establishing a secure collaborative workspace.

Qualifications

• 6+ years of experience in detection engineering or threat hunting.
• Experience building production detections with strong quality.
• Fluent in detection languages such as Sigma, KQL, or EQL.
• Cloud security experience in AWS, GCP, or Azure.

Responsibilities

• Design and maintain high-signal detections in various environments.
• Build and improve the detection platform.
• Participate in incident response and investigations.

Skills

Detection engineering

Security operations

Incident response

Threat hunting

Cloud security

SIEM

EDR

SOAR platforms

Detection languages (Sigma, KQL, etc.)

Job description

Who We Are

Notion is the collaborative AI workspace where teams and agents think together. We’re building one place where your knowledge, projects, meetings, and AI tools live side by side, so work feels faster, clearer, and less fragmented. Millions of individuals, small teams, and large companies run their work on Notion.

Notinos (our employees) are customer zero in bringing this future of work to life. We care about craft, humanity, and building things that last — not just shipping the next feature, but setting a standard for how modern teams (with humans and agents working together) think and execute.

About The Role

Millions of people rely on Notion to do their most important work, and protecting that trust is foundational to everything we build.

We’re looking for a hands‑on Detection Engineer to build and operate the systems and workflows we use to detect and respond to attacks across Notion’s cloud‑native environment. You’ll ship high‑signal detections, improve the platform that powers them, participate in incident response, and help shape how detection and response engineering scales at Notion.

You’ll work closely with Engineering, Corporate Security, and Infrastructure, with broad latitude to identify gaps, prioritize investments, and build what’s needed next.

We view detection and response as a software engineering discipline: detections are code, platforms are products, and measurement matters

What You’ll Achieve

• Design and maintain high‑signal detections across cloud, identity, endpoints, and SaaS environments.
• Build and improve the detection platform, including rule lifecycle management, tuning, measurement, and rollout safety.
• Develop tooling and automation that accelerate triage, enrichment, investigation, and detection authoring, including LLM‑based workflows where useful.
• Translate threat intelligence and adversary TTPs into durable detections, telemetry requirements, and response improvements.
• Participate in investigations, incident response, and postmortems that drive long‑term security improvements.
• Define and track key metrics such as coverage, MTTD, and alert quality to guide investment decisions.
• Participate in a shared on‑call rotation for incident response.

Skills You’ll Need to Bring

• Have 6+ years of experience in detection engineering, security operations, incident response, or threat hunting.
• Have built and operated production detections with strong signal quality and sustainable tuning processes.
• Are fluent in one or more detection languages such as Sigma, KQL, SPL, YARA‑L, EQL, or Panther.
• Have an offensive security mindset and have led purple team, blue team, or adversary emulation exercises that improved detections and telemetry.
• Have strong cloud security experience in AWS, GCP, or Azure, including identity‑focused attack detection.
• Are hands‑on with SIEM, EDR, and SOAR platforms in large‑scale environments.
• Communicate clearly through design docs, runbooks, and incident reports, and can drive projects independently.

Nice to Have

• Experience applying LLMs or agent‑style tooling to security workflows.
• Experience securing AI‑enabled systems or endpoint tooling.
• Kubernetes or container detection experience.
• Background in threat intelligence, malware analysis, or digital forensics.
• Contributions to the detection engineering community through research, tooling, or talks.
• Experience at a high‑growth startup or AI company.

Notion is committed to providing highly competitive cash compensation, equity, and benefits. The compensation offered for this role will be based on multiple factors such as location, the role's scope and complexity, and the candidate's experience and expertise, and may vary from the range provided below. The estimated base salary range for this role is €127,000–€142,000 per year.

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A Note on AI

You don’t need deep AI expertise for every role, but we do expect every Notino to be intellectually curious, drawn to tinkering and discovery, and excited to use AI as a real collaborator in their work. For some roles, AI fluency is a core requirement — when that’s the case, we’ll make it explicit in the qualifications. People who thrive here don’t treat AI as a novelty. They use it to think better, move faster, and build more creatively.

Equal Opportunity & Accommodations

We hire talented and passionate people from a variety of backgrounds because we want our teams to reflect the wide diversity of our customers. If you’re excited about a role but your experience doesn’t align perfectly with every bullet point listed, we still encourage you to apply.

Notion is proud to be an equal opportunity employer. We do not discriminate in hiring or any employment decision based on race, color, religion, national origin, age, sex (including pregnancy, childbirth, or related medical conditions), marital status, ancestry, physical or mental disability, genetic information, veteran status, gender identity or expression, sexual orientation, or other applicable legally protected characteristic. Notion considers qualified applicants with criminal histories, consistent with applicable federal, state and local law. Notion is also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, please let your recruiter know.