OverviewWe’re Checkout.com – you might not know our name, but companies like eBay, ASOS, Klarna, Uber Eats, and Sony do. That moment when you check out online? We make it happen.Checkout.com is where the world checks out. Our global network powers billions of transactions every year, making money move without making a fuss. With 19 offices spanning six continents, we feel at home everywhere – but London is our HQ. Wherever our people work their magic, they’re fast-moving and performance-obsessed, driven by being better every day. This is a career-defining opportunity to build the future of fintech.Role: hands-on Platform Security Engineer in Checkout.com’s Global Technology & Security Office. This role provides technical depth and oversight across security tooling and guardrails, ensuring controls are deployed, configured, monitored, and effective. This is a delivery-oriented role focused on DLP, SIEM, and AI governance guardrails, reporting to the CISO & VP IT and partnering with InfoSec, the SOC, Legal, Procurement, and the AI Centre of Excellence.What We’re Looking ForProven experience as a Security Engineer, Platform Security Engineer, or similar role, with hands-on configuration of DLP, SIEM, and endpoint tooling.Strong working knowledge of Microsoft and Google enterprise environments.Familiarity with cloud-native logging pipelines (AWS CloudTrail, GCP Audit Logs, Azure Monitor) and SIEM content development.Familiarity with AI/ML governance challenges (prompt injection, data leakage, model misuse) and a strong willingness to learn.Experience collaborating with SOCs, Legal, and Compliance teams.Comfortable working independently, taking ownership of configurations, and delivering measurable improvements.Pragmatic and solutions-oriented: able to balance strong controls with business usability.Bonus: exposure to PCI DSS, GDPR, ISO 27001, or SOC 2 controls in fintech or high-growth SaaS environments.ResponsibilitiesDLP & Endpoint Security: Design, configure, implement and maintain DLP policies across email, endpoints, SaaS apps and cloud storage; configure and maintain DLP, EDR and endpoint controls to detect and block sensitive data exfiltration; collaborate with Legal on legal hold, eDiscovery workflows and sensitive case management.Security Threat and Vulnerability Monitoring: Provide oversight on the SentinelOne SIEM rollout, define security logging and alerting standards for high-risk activity.Ransomware Resilience: Configure and maintain EDR/anti-ransomware policies, develop detection use cases for ransomware indicators, and design/red-team tabletop simulations to test incident response.AI Architecture and Design: Implement guardrails for managed AI/ML use, model risk and logging; integrate AI oversight with DLP and SIEM; collaborate with the AI Centre of Excellence to enforce secure AI workflows and conduct periodic AI risk assessments.Identity & Messaging Hardening: Deprecate insecure protocols, deploy conditional access policies, harden file-sharing and collaboration with least privilege and monitoring.Cross-functional Enablement: Partner with Information Security, SOC, Procurement, and Legal to ensure policy decisions are backed by technical guardrails; provide reference architectures and training; ensure vendor security assessments meet DLP, SIEM and logging requirements.What We’ll Look For in youExperience collaborating with SOCs, Legal, and Compliance teams.Ability to deliver measurable improvements and balance security with usability.Life at Checkout.comWe create conditions for high performers to thrive: ownership, fewer blockers, and meaningful work from day one. You’ll move fast, take on challenges, and be recognized for impact. We value diverse backgrounds and identities and will support accessibility needs in the application process. Our hybrid model offers flexibility with three days per week in the office for collaboration.Learn more about our culture, open roles, and what drives us on our Careers Page. Follow us on LinkedIn and Instagram for a closer look at daily life at Checkout.com.Job DetailsSeniority level: Mid-Senior levelEmployment type: Full-timeJob function: Information Technology #J-18808-Ljbffr