Senior Security Engineer

Overview

This is a hands-on individual-contributor role centered on security hardening: making Atari’s systems harder to attack by designing, implementing, and advising on technical security controls and secure configuration across our cloud and on-premise environment. You own the technical security posture on top of that, including detection and incident response, oversight of external testing, and the security of new environments brought into Atari.

Penetration testing is delivered by specialist vendors you scope and oversee, and after-hours monitoring is supported by tooling and managed services, so this is not a one-person, round-the-clock SOC.

What You’ll Do

• Design, implement, and continuously improve security controls and secure baselines across cloud (AWS, Azure, GCP) and on-premise environments.
• Review infrastructure changes and new deployments through a security-architecture lens and recommend hardening before they ship.
• Verify controls are effective and drive misconfigurations and weaknesses to closure.

• Scope and oversee penetration-testing and vulnerability-assessment vendors, ensuring comprehensive coverage.
• Run hands-on scans of Atari’s infrastructure and platforms (vulnerability, cloud-posture, and configuration checks) and act on the results.
• Triage and prioritize findings and drive remediation of critical issues to closure.
• Conduct targeted vulnerability assessments and internal security audits of systems, applications, and services.

• Work directly with development teams on secure coding practices.
• Review code for vulnerabilities and give developers actionable guidance (OWASP Top 10, application security).
• Integrate security into Dev Sec Ops  pipelines and CI/CD workflows.

• Own detection and response: set detection priorities mapped to MITRE ATT&CK and direct tuning of monitoring/SIEM and managed-service coverage.
• Lead technical incident response end to end (investigation, containment, eradication, recovery, root-cause analysis) and turn findings into preventive hardening.
• Run targeted threat hunting; act as primary technical responder during business hours, backed by tooling and managed services after hours.

• Assess the security of new companies, systems, or environments brought into Atari, surfacing risk before and during integration.
• Maintain an authoritative asset inventory and attack-surface map, and bring new environments up to Atari’s hardening standards.

• Use and integrate AI-powered security tools for detection, hardening, and daily security operations, and evaluate new AI tooling as it emerges.
• Develop scripts and tooling (Python, Bash, Power Shell) to automate and scale hardening, detection, and routine operations.
• Stay current with emerging threats and attack techniques and fold them into controls and detections.

Owns technical security decisions within agreed thresholds: approving security configurations, remediation priorities, automation scripts, and Dev Sec Ops  integrations; defining pen-test scope and security requirements for development teams; directing incident-response actions (isolation, containment, fixes); and making go/no-go security recommendations on new environments. Escalates to the Security & Compliance Lead beyond those thresholds.

Requirements & Qualifications

• Based in Newcastle or within commutable distance
• 4–7 years of hands‑on security engineering, with clear strength in security hardening and secure configuration (cloud and/or on‑premise), plus working competence across vulnerability management, application security, and detection & response.
• Proven cloud security experience on at least one major platform (AWS, Azure, or GCP); comfort working across more than one.
• Strong scripting for security automation (Python, Bash, and/or Power Shell).
• Hands‑on experience with SIEM, EDR, IDS/IPS, and vulnerability scanners.
• Demonstrated ability to lead technical incident response and perform root‑cause analysis.
• Solid understanding of…