Top Security Engineer Jobs in Seattle, WA

Lead infrastructure security for GitLab’s FedRAMP and federal cloud environments. Set technical direction, architecture, security automation, and compliance patterns; own security posture; lead threat modeling, security reviews, continuous monitoring, and authorization-impacting initiatives. Partner with SRE, engineering, compliance, and leadership to drive remediation and roadmap decisions. Apply AI to constrained security workflows, mentor engineers, and influence security practices across GitLab offerings.

Lead Samsara’s application security and vulnerability management programs across cloud, firmware, IoT, and corporate systems. Set technical direction, automate vulnerability detection and response, reduce remediation time, guide engineering teams, mentor security engineers, investigate critical vulnerabilities, communicate risk to leadership, and provide on-call support. The role requires broad enterprise security experience, cloud expertise, secure development testing knowledge, and practical AI/LLM security workflow experience.

Leads the architecture, modernization, resilience, security, and performance optimization of enterprise mainframe environments. Responsibilities include z/OS performance tuning, WLM and RACF administration, business continuity planning, automation, technical governance, incident resolution, stakeholder collaboration, and guidance of cross-functional engineering and operations teams. The role also evaluates cloud, DevOps, AI, and hybrid IT technologies for mainframe transformation.

Lead DigitalOcean’s AI security strategy, governance framework, threat modeling, and multi-year roadmap. Partner with security, engineering, and data science teams to secure AI products, deploy guardrails, conduct adversarial testing and red teaming, and monitor AI/ML systems. Provide architectural reviews, executive risk briefings, and guidance on emerging threats including prompt injection, model supply-chain risks, agentic AI, and data exfiltration.

Lead cryptographic security assessments of protocols, libraries, applications, and high-assurance systems. Analyze advanced cryptographic constructions, identify design and implementation weaknesses, validate exploitability, and recommend remediation. Build testing and analysis tools, manage client delivery, write precise technical reports, mentor engineers, contribute to methodologies and services, and support open-source research and technical publications.

Build and lead a scalable application security and secure SDLC program across engineering teams. Establish policies, standards, tooling, vulnerability management, threat modeling, developer enablement, security champions, software supply-chain controls, and executive reporting. Partner with development, platform, DevOps, product, and leadership teams to integrate security into CI/CD, source control, build, release, and deployment workflows while supporting audits, advisories, incident response, and regulatory requirements.

Leads teams designing and deploying AI-driven enterprise and cloud security solutions. Responsibilities include developing machine learning systems, integrating data infrastructure and pipelines, performing advanced modeling and analysis, and building AI applications with Python, Java, and C++. The role involves client engagement, strategic problem-solving, stakeholder validation, coaching, process innovation, and operational excellence while addressing complex cybersecurity and privacy challenges.

Leads the design and development of AI-driven enterprise and cloud security solutions. Manages teams delivering data, analytics, and machine learning engineering projects; oversees AI model implementation, data infrastructure, pipelines, and platform deployments. Uses Python and C++ for algorithm development, analyzes data, improves data quality, ensures technical compliance, mentors staff, manages client expectations, and drives innovation across cybersecurity and privacy initiatives.

Principal Security Engineer role at Coupang. The posting contains template placeholders and does not specify responsibilities, qualifications, required technologies, compensation amounts, travel, or security clearance details. Applicants must complete the Internal Transfer Request Form and apply using their Coupang email address.

Partner with sales teams to win strategic data security opportunities. Present technical solutions, gather customer requirements, lead product evaluations, configure solutions, and design evaluation test plans. The role requires extensive pre-sales experience, security and networking expertise, data protection and web technology knowledge, and collaboration across matrixed go-to-market and partner teams.

Designs, implements, and maintains secure network infrastructure for Lightning AI’s production and AI environments. Responsibilities include firewall, VPN, IDS/IPS, segmentation, vulnerability assessment, penetration testing, SIEM monitoring, incident response, compliance documentation, access controls, and security automation. The role partners with infrastructure and engineering teams to mitigate threats and optimize security controls.

Lead the strategy, architecture, and development of Uber’s enterprise endpoint security platform across macOS, Windows, and Linux. Drive vulnerability management, application security, scalable defense automation, and AI-enabled security operations. Establish technical direction, mentor engineers, promote engineering excellence, and collaborate across IT, product, and operations teams to improve security posture at cloud scale.

Architect and scale global network security systems for bot detection, bot mitigation, and DDoS defense. Build distributed backend systems, ML-driven threat defense pipelines, feature stores, and real-time streaming infrastructure. Lead technical strategy, vendor integrations, architecture reviews, security KPI development, experimentation, and cross-functional initiatives while mentoring engineers.

Lead architecture and evolution of an enterprise vulnerability management platform. Design risk-based vulnerability management systems, automate remediation, integrate security scanning into development and infrastructure workflows, and apply AI/ML to vulnerability triage and remediation. Establish governance, analyze complex vulnerabilities, guide risk decisions, mentor engineers, and collaborate across IT, product, compliance, and operations teams.

Build and own detection tooling and logging/alerting systems, create and tune analytics for threat detection, investigate and triage incidents (on-call), drive incident response across teams, and help define and execute detection and response strategy with a detection-as-code mindset.

Lead strategy and technical execution of vulnerability management, offensive security, and AI-augmented defenses. Own full VM lifecycle, integrate scanning and asset systems, automate remediation, generate security insights, define KPIs/SLAs, advise executives, and mentor engineers to improve organizational security posture and compliance.

The Senior Security Engineer will secure networks, systems, applications, databases, and cloud infrastructure; embed security controls into build pipelines; manage vulnerabilities and remediation; respond to incidents through on-call rotation; and promote security awareness across engineering. The role requires cloud security, infrastructure-as-code, application security, REST API protection, IAM, and tools including AWS, Kubernetes, Terraform, Wiz, Exaforce, and CrowdStrike.

Lead enterprise security architecture across endpoint, identity, network, cloud, and data. Define controls, review major initiatives, automate control deployment (IaC/PaC), mentor engineers, and drive zero-trust and cloud security strategy at scale.

Perform offensive security research and engineering for Windows: discover vulnerabilities, develop PoC mitigations and tools (fuzzers/agents), conduct code and design reviews, partner with product teams, and engage external researchers to improve OS security.

Conduct vulnerability research across operating systems, cloud platforms, and virtualization technologies through design and code review, fuzzing, variant analysis, and reverse engineering. Develop platform mitigations, security tooling, detection capabilities, and systemic protections. Partner with engineering teams to improve secure development practices, lead complex security initiatives, track emerging attack techniques, and mentor peers.

Secure Windows products and devices through offensive security research, code and design reviews, penetration testing, vulnerability discovery, fuzzing, and mitigation development. Build reusable security review tools, identify vulnerabilities in operating system features and native applications, collaborate with Windows engineering teams on durable defenses, engage security researchers, and communicate the business value of security investments.

Leads red team operations, penetration testing, threat modeling, and adversarial simulations across applications, infrastructure, corporate, and physical environments. Develops security-testing tools, partners with detection and response teams, communicates and remediates findings, leads related incidents, and mentors offensive security engineers. The role requires advanced knowledge of cloud, containers, defensive evasion, identity security, network protocols, and MITRE ATT&CK, along with Python, Go, and JavaScript proficiency.

Secure Wiz’s products, CI/CD systems, and production cloud infrastructure through threat modeling, security reviews, vulnerability management, detection and response, cloud and Kubernetes security baselines, policy-as-code, and automation. Partner with engineering, DevOps, operations, and Federal teams to implement scalable security controls, remediate risks, support FedRAMP requirements, and promote secure-by-design development practices.

Secure Windows products and devices through security design and code reviews, penetration testing, vulnerability research, fuzzing, and mitigation development. Build reusable security-review tools, identify vulnerabilities in operating-system features and native applications, investigate attack vectors, and collaborate with Windows engineering teams to implement scalable defenses. The role also involves engaging with external security researchers and communicating the business value of security investments.

Designs and operates controlled cyber-capability evaluations for frontier AI models and agentic systems. Builds vulnerable applications, cyber ranges, exploit-development targets, and evaluation harnesses; runs experiments; collects telemetry; analyzes model behavior and evaluation artifacts; and documents security findings. The role also develops sandboxing, containment, access, and secrets-management controls while collaborating with red-team operators, researchers, engineers, and Responsible AI stakeholders.