Top Security Engineer Jobs in Seattle, WA

Perform deep security analysis of endpoint products and sensors: threat modeling, source-code review, exploit-style testing (including kernel components), reproduce/validate bug bounty findings, collaborate with developers to fix vulnerabilities, and build tooling/automation to improve security workflows.

Perform application security assessments across CrowdStrike products: threat modeling, code review, penetration testing, and secure design guidance. Build automation and tooling, respond to bug bounty reports, and collaborate with engineering to remediate defects and harden cloud-native, containerized applications.

Lead AI security strategy and guardrails, design and review AI gateways and tooling, scale InfoSec review processes, reduce AI-driven security noise, drive remediation and investigations, and mentor security and platform engineers.

Lead architecture and implementation of network security across edge, backbone, and datacenter environments. Provide technical leadership, conduct threat modeling and network security assessments, build security automation and IaC, integrate controls into SDN/BGP/MPLS systems, participate in incident response, and drive security reviews and best practices across teams.

Own the security risk posture for the virtualization stack by building threat models, assessment rubrics, and defenses. Propose and implement mitigations, partner with engineering teams to drive remediations, mentor engineers on secure practices, and help oversee vulnerability management and security guidance.

Design, build, and maintain security products and infrastructure: real-time detection engines (Flink/Kafka), high-performance APIs (Go/Node.js), streaming analytics, Kubernetes at hyperscale, and petabyte-scale data pipelines. Lead technical designs, collaborate with security teams, and mentor junior engineers.

Design and implement security controls for identity, access management, and endpoint security. Lead initiatives around zero trust and phishing-resistant MFA.

Lead detection and response efforts: build detections, manage SIEM and orchestration tooling, deploy AI in SOC workflows, investigate incidents across AWS/EKS environments, support threat modeling and vulnerability scanning, and take on-call shifts.

Lead product security across the SDLC: threat modeling, secure architecture, vulnerability management, security testing and remediation, CI/CD/DevSecOps controls, AI security integration, bug bounty triage, developer training, and cross-functional security consulting to scale secure-by-design practices.

As a Security Engineer, you will conduct security assessments, develop security tools, perform architecture reviews, and collaborate on advanced security research.

The Senior Application Security Engineer oversees application security, works on AI threat modeling, and collaborates with engineers to enhance security infrastructure and compliance with regulations.

Lead and execute Grow Therapy's multi-year Security Engineering roadmap. Build secure-by-default infrastructure (auth, authZ, logging, egress), drive data security and systematic data tagging, develop org-wide security scorecards, enable automated least-privilege and vulnerability management, and influence AI-native security and security culture across product, platform, and compliance teams.

This role involves owning the security architecture for AI platforms on GCP, designing guardrails, and integrating security into CI/CD pipelines. Candidates should have extensive experience in cloud security, specifically with GCP services, Kubernetes security, and AI/ML security practices.

Design, build, and operate identity and access management solutions across cloud, Kubernetes, and SaaS. Implement role design, reduce privilege sprawl, automate access workflows and reviews, integrate logging/metrics into SIEM, detect high-risk permissions, and drive secure-by-default practices and operationalization.

Lead assessment and mitigation of security risks in the virtualization stack. Build threat models, rubrics, and defenses; partner with kernel, virtualization, and provisioning teams to design and implement mitigations; mentor engineers, manage vulnerability backlog, and promote security best practices across product teams.

Design, implement, and maintain scalable cloud security controls for Vercel's platform. Harden infrastructure using infrastructure-as-code and policy enforcement, secure CI/CD pipelines, perform threat modeling and risk analysis, improve monitoring and incident response, and build platform-level security tooling in collaboration with platform and infrastructure teams.

Design, maintain, and extend abuse detection and prevention systems for GitLab's SaaS platform. Serve as a core maintainer of a Ruby on Rails monolith, build anomaly detection and agentic AI mitigations, automate abuse response, collaborate with peer engineering and security teams, and produce runbooks and operational documentation.

Design, deploy, and maintain SOAR capabilities for security automation, develop workflows, and integrate AI tooling for enhanced security responses.

Lead product and application security by partnering with product and engineering to design secure features, perform code and architecture reviews, build AI-native security tooling, create developer guardrails, and support incident response, vulnerability management, and penetration testing to scale Headway's security program.

Lead application and product security across web, mobile, API, AI/CV, and cloud-native systems. Drive secure SDLC, DevSecOps, CI/CD and supply chain security, threat modeling, tooling/automation, vulnerability remediation, and developer enablement while partnering closely with engineering teams.

The Security Software Engineer will design and implement security controls for MongoDB Atlas, collaborating across engineering teams and ensuring adherence to high security standards.

The Senior Site Reliability Engineer will lead security design and implementation for cloud infrastructures, mentor teams, and automate security solutions.

Design and build backend services for a digital asset custody platform, including secure transaction orchestration, wallet lifecycle management, integrations with custody providers and blockchain infrastructure, resilient APIs, high-availability systems, observability, and close collaboration with security and product teams.

The role involves leading security initiatives, building security tools, conducting vulnerability assessments, and collaborating with teams to enhance cloud security and risk management.

Perform hands-on application and system security assessments: discover and validate vulnerabilities, develop proof-of-concepts and custom tooling, conduct threat modeling and architecture reviews, and communicate clear remediation guidance to clients while contributing to security research.