Top Cyber Security Jobs in Dublin

Lead architecture and design of a cloud-native, high-volume dispute platform. Provide technical authority, drive engineering excellence, embed PDLC discipline, apply AI/automation to engineering workflows, partner across teams, and mentor engineers to deliver reliable, secure systems at scale.

Own and evolve Mastercard's Data & AI platform and products: define roadmaps, treat data as a product, lead cross-functional teams, ensure governance and compliance, operationalize agentic AI and HITL workflows, translate regional requirements, and deliver scalable, high-quality data products.

Design and implement scalable threat detection, investigation, and automated response capabilities for Datadog Cloud SIEM. Research attacker techniques, build high-fidelity detection content across cloud, identity, endpoints, and networks, and improve AI-assisted SOC workflows. Own detection lifecycle from research to deployment, collaborate with Product and Engineering, mentor engineers, and contribute to security research and open-source initiatives.

Join the Server Ingress Security team to enhance MongoDB's security. Responsibilities include designing and implementing security services in Rust, and collaborating across teams to maintain security and performance of database services.

Design and build security solutions for MongoDB Atlas multi-cloud infrastructure, ensuring high security standards while collaborating with engineering teams.

Join Notion's Detection and Response team as a Security Operations Engineer, focusing on investigating security events and mentoring junior engineers, ensuring operational excellence in security practices.

As a Software Engineer on the Infrastructure Security team, you will design, build, and maintain cloud-native security services, improve system efficiency, and collaborate with engineers to ship secure software.

The Security Automation Engineer designs and implements automation frameworks for security operations, focusing on compliance and scalable security controls for Managed Services platforms.

The Senior Network Security Engineer designs and implements network security architectures, standardizes firewall platforms, and ensures secure connectivity across hybrid and multi-cloud platforms while leading incident response efforts.

The Lead Engineer will develop and operate security services in Rust, ensuring database security and performance while collaborating across teams to enhance MongoDB's security capabilities.

Senior leader responsible for building and governing enterprise risk intelligence: establish analytic standards, lifecycle processes, QA, governance, and 24/7 coverage. Produce scalable threat assessments, long-term forecasts, situational awareness, and executive briefings while integrating with protective intelligence, crisis management, and security operations.

Execute and manage IT audit activities, assess controls and regulatory compliance (SOX, GDPR, ISO, NIST), run control testing, use GRC tools for evidence tracking, perform IT risk assessments, manage third-party risk, coordinate with auditors and stakeholders, and provide actionable security and compliance insights to leadership.

Join the Server Ingress Security team to design and implement security services in Rust, ensuring the security and performance of MongoDB’s ingress networking.

Drive cloud security initiatives for MongoDB Atlas, perform security reviews, design cloud architectures, and mentor engineers, focusing on pragmatic guidance and actionable improvements.

Lead detection and response across cloud, blockchain, and AI surfaces. Build detection coverage, run incident response, deploy SOC AI tooling, maintain SIEM/SOAR and orchestration, and collaborate cross-functionally to remediate threats and improve visibility. Participate in on-call rotation and support threat modeling, vulnerability scans, and custom tooling.

Lead and coordinate delivery across three engineering squads, translating priorities into executable plans, managing dependencies, risks, and releases. Drive Agile practices, apply AI-enabled planning tools, capture delivery metrics, and liaise with Product, Security, DevOps, and stakeholders to ensure predictable, secure, and timely software delivery.

Support cloud security by managing IAM across tools, maintaining security tooling and monitoring, investigating alerts, reviewing Terraform PRs for secure deployments, and tracking threat intelligence while learning cloud-native security practices.

The Staff Infrastructure Security Engineer will lead security initiatives, set architectural patterns, conduct security reviews, and mentor engineers while ensuring security in cloud infrastructures for GitLab.

Lead investigations and incident response using SIEM and SOAR, design detection alerts, perform threat hunting across endpoints, network, application and logs, analyze compromises and malware, build playbooks and security tools, share findings to improve product/security posture, and mentor junior team members.

Dragonfly is seeking Software Engineers for various portfolio companies, focusing on crypto technologies. Engineers of all experience levels are needed across multiple stacks.

Lead design and development of low-level Linux instrumentation and eBPF-based runtime security features for detection, monitoring, and workload protection. Drive architecture, implement performance-sensitive systems, establish testing methodologies, deliver end-to-end features, and provide technical leadership and cross-team collaboration across Datadog's security products.

The role involves enhancing MongoDB’s database security through ownership of security initiatives, promoting best practices, and collaborating with engineering teams on security architecture. Responsibilities include threat modeling, conducting security assessments, and educating the organization on security matters.

Lead end-to-end SaaS implementation projects for foundations and nonprofits: plan, coordinate resources, run discovery and workshops, manage data migrations and integrations, validate solutions, oversee UAT, communicate with stakeholders, and transition customers to support while improving implementation processes.

Design, build, operate, and support resilient distributed platform services. Write maintainable code, troubleshoot production issues, improve reliability and observability, and assist internal teams. Participate in on-call rotations and collaborate on platform evolution.

Lead security architecture and strategy for Mastercard's blockchain platforms. Drive threat modeling, risk assessments, Secure-SDLC adoption, embedding security in CI/CD, APIs, and cloud services. Partner with engineering, product, and compliance teams to implement controls, meet regulatory standards, mentor engineers, and represent Corporate Security in cross-functional initiatives.