Lead DevSecOps Engineer

Lead DevSecOps Engineer London | Hybrid | Competitive Salary + Equity A well-funded, fast-growing technology company is building critical software and infrastructure for the next generation of autonomous and data-driven systems. They are looking for a Lead DevSecOps Engineer to take ownership of their internal developer platform and build the infrastructure, tooling and engineering practices that allow teams to ship secure, reliable software at pace. This is a highly autonomous role where you'll treat infrastructure as a product. You'll work closely with engineering teams to remove friction from the development lifecycle, standardise deployment patterns and build a robust "Golden Path" from local development through to production. What you'll be doing Own and evolve the internal developer platform and overall Developer Experience.Design secure, automated and repeatable deployment patterns across environments.Drive modern CI/CD and GitOps practices across the engineering organisation.Build and maintain infrastructure across cloud and hybrid environments.Manage containerised workloads and orchestration at scale.Develop Infrastructure as Code using tools such as Terraform, OpenTofu or Pulumi.Build automation and internal tooling using Python, Go or Bash.Improve platform security through automated policy enforcement and compliance-as-code.Build standardised observability and telemetry across the platform.Own and improve critical engineering tooling and infrastructure.Help migrate and evolve platforms with minimal disruption and strong data integrity.Work closely with software engineers to make infrastructure simpler, safer and more self-service.What they're looking for 3+ years' experience building or scaling developer platforms, DevOps infrastructure or sophisticated CI/CD environments.Strong understanding of cloud-native infrastructure across compute, networking and storage.Experience with Kubernetes or similar container orchestration platforms.Strong Infrastructure as Code experience, ideally with Terraform, OpenTofu or Pulumi.Strong scripting or systems programming skills in Python, Go or Bash.A genuine software engineering mindset — you're comfortable building tools and platforms, not just maintaining infrastructure.Experience embedding security, observability and reliability into developer workflows.Bonus points for GitLab, Artifactory, SonarQube or other self-hosted engineering platforms.GitOps and tools such as ArgoCD.OpenTelemetry, Prometheus, ELK or similar observability tooling.OPA, Kyverno, AWS Config or other policy/compliance tooling.Service mesh technologies such as Istio or Linkerd.Experience working across hybrid or highly secure environments.Experience with classified or sensitive networks.FinOps, cost attribution or automated infrastructure optimisation.Go, Python or Rust development for internal tooling, controllers or APIs.You don't need to tick every box. They're looking for someone technically strong, curious and capable of taking genuine ownership of a complex platform. The opportunity You'll join at an early and important stage, with significant influence over the architecture and direction of the engineering platform. There is a strong emphasis on technical autonomy, engineering quality and solving genuinely difficult problems. You'll work alongside an exceptional team and have the opportunity to build infrastructure that directly enables the wider engineering organisation. Location: London — hybrid, with a preference for working from the office. Right to Work: Applicants must already have the right to work in the UK. Security: This position requires UK security clearance or willingness to undergo security vetting