Platform Security Engineer - HashiCorp Vault

Platform Security Engineer (DevSecOps) | Contract | Hybrid London

We are working with a leading technology-driven investment firm looking for a hands-on Platform Security Engineer to help build and scale secure platform capabilities across a complex cloud environment.

This is an engineering-focused role for someone who enjoys solving security challenges through automation, platform engineering and software development rather than policy, governance or compliance.

You'll play a key role in designing and operating identity, secrets management and access platforms that support engineering teams at scale.

Key Responsibilities

• Build and operate security platforms using Infrastructure as Code
• Design and automate identity, authentication and secrets management workflows
• Develop secure, reusable platform services for engineering teams
• Integrate security controls into cloud-native environments and CI/CD pipelines
• Support and troubleshoot production issues across infrastructure, applications and platforms
• Improve developer experience by making secure solutions easy to adopt
• Eliminate manual processes through automation and engineering

Essential Skills & Experience

• Strong experience with AWS
• Hands-on Terraform experience
• Strong experience with HashiCorp Vault (Vault Enterprise highly desirable)
• Experience designing and operating secrets management solutions
• Strong understanding of IAM, RBAC and privileged access management
• Experience with OIDC, OAuth2 and JWT authentication mechanisms
• Strong scripting or development experience using Python, Go or Bash
• Experience building and supporting CI/CD pipelines
• Background in Platform Engineering, DevSecOps, Infrastructure Security or Cloud Security Engineering
• Experience operating and supporting production environments

Desirable Skills

• Kubernetes / EKS
• SailPoint
• CyberArk
• GitOps
• Service-to-service authentication
• Zero Trust architectures
• Financial Services, Trading or FinTech experience

We're Interested In Engineers Who

• Automate repetitive tasks rather than creating manual processes
• Enjoy understanding how systems work end-to-end
• Focus on solving root causes rather than symptoms
• Can balance security, usability and delivery
• Take ownership of the platforms they build and support
• Communicate effectively across engineering, infrastructure and security teams