Platform engineer

About the role

Hybrid with travel to Bath, London and Edinburgh a couple times a month About us Seccl is the Octopus-owned embedded investment platform, on a mission to help more people invest, and invest well. We’re building the infrastructure behind the next generation of investing. Our technology already powers some of the UK’s most ambitious fintechs, banks, financial advisers and wealth firms, with close to a million investors relying on Seccl-powered platforms. And we’re now expanding into Europe. We’ve got a proven product, strong momentum and big ambitions for what comes next: helping more household-name brands launch and scale investment propositions, entering new markets and replacing outdated investment infrastructure with technology that’s faster, simpler and built for scale. We’re proud to be part of Octopus, one of the UK’s most successful privately held investment and technology groups. That gives us the backing and long-term perspective to build something substantial, while keeping the pace and energy of a high-growth business. Seccl and Octopus are both B Corp certified and share a belief that profit and purpose should go hand in hand. If you want to help shape the future of investing in the UK and across Europe, you’ll be in good company. Check out the Seccl website to see what we’re building and read more about our mission to shape the future of investments. The role We're looking for a Platform engineer to shape and evolve the platform that underpins our investment products. You’ll be someone who loves understanding engineering problems and enabling teams to self-serve their needs. You view the cloud platform as a product, and engineering as your customer. The role is within our Cloud Resilience team - a critical squad within our engineering organisation responsible for empowering squads to build and run their own services. We’re primarily in AWS, utilising Lambda, ECS, SQS, EventBridge, API Gateway, Aurora, Redshift among others. Our main data store is MongoDB Atlas and our observability platform is Datadog. Our application is written in Typescript/NodeJS and our infrastructure is defined in Terraform. On a typical day you will be… Architecting, implementing, and maintaining scalable, secure infrastructure in AWS using Terraform. Designing cloud-native solutions using MongoDB, Lambda, API Gateway, and other AWS services with a strong focus on serverless. Contributing to incident response efforts, production readiness, and reliability initiatives across engineering squads. Enhancing observability and platform insight through actionable alerting and data visibility using Datadog. Continuously improving CI/CD processes with GitHub Actions, reducing friction in delivery pipelines. Collaborating with software engineers (working in Node.js/TypeScript) to ensure secure, performant, and resilient applications. Mentoring engineers and champion DevOps culture and best practices across teams. This role’s for you if... You’re a pragmatic platform engineer with experience in regulated environments, balancing delivery with compliance and operational excellence. You’re confident working with JavaScript/TypeScript-based applications and collaborating closely with development teams. You know what “good” looks like for databases like MongoDB and Postgres and can diagnose, design, and optimise for scale and resilience. You care deeply about observability - you don’t just monitor systems, you build alerts that engineers can act on. You’re fluent in AWS best practices, infrastructure-as-code (Terraform), and CI/CD tooling like GitHub Actions. You’ve had exposure to architectural decisions and willingness to own of platform-level outcomes. This role isn’t for you if... You rely on a lot of top-down direction. Here, you’ll have a lot of freedom and ownership of your role, and you’ll be expected to shape your own progression You’re not comfortable working in a fast-paced environment. Our speed and scalability are what set

Skills