Senior DevOps Engineer (AWS Platform)

About the Role We’re a security-first fintech scale-up building a globally distributed platform, and we’re looking for a Senior DevOps Engineer to help scale and mature our AWS infrastructure. Reporting to the Head of DevOps, you’ll take ownership of a AWS platforms supporting multiple environments and services. You’ll focus on improving resilience, scalability, cost efficiency, and developer experience, while driving standardisation through infrastructure as code and platform best practices. This is a hands-on role where you’ll collaborate closely with Engineering, WebApps, QA, and Security teams to build systems that are robust, observable, and aligned with AWS best practices and the Well-Architected Framework. What You’ll Be Doing Design, build, and manage AWS infrastructure using Terraform, with a focus on reusable modules and standardisation Operate and optimise AWS services including ECS, EC2, Lambda, SQS/DLQ, CloudWatch, IAM Develop and improve CI/CD pipelines (GitHub Actions, CodeDeploy) for consistent, reliable deployments Build and enhance observability frameworks (logging, monitoring, alerting) across distributed systems Implement and manage identity and access controls, including SSO and access brokering Collaborate with Security on platform hardening and integration with security tooling (e.g. SIEM, DLP) Contribute to platform engineering initiatives Drive cost optimisation efforts across AWS (rightsizing, reserved capacity, scaling strategies, and cost visibility) Troubleshoot production issues, perform root cause analysis, and implement long-term fixes Continuously improve infrastructure through automation, documentation, and best practices Working closely with Engineering team to design, deploy, harden and consistently keep secure containerisation and deployment Working with Compliance teams on PCI DSS, ISO27001 and SOC2 standards, making sure infrastructure is compliant