Lead - Software Engineer (DevEx)

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About this role

Lead - Software Engineer (DevEx) London Lead Software Engineer - Developer Experience (DevEx) I n Short At On, we believe technology should move as fast as a runner. We are building the foundation that allows our engineering organization to scale, innovate, and deliver value without friction. We are looking for a Lead Software Engineer to join the Developer Experience (DevEx) team. In this hands-on role, you will build the platform that empowers dozens of technology teams to build, ship, and operate services effortlessly. You will be involved in architecting and building our "Golden Path," ensuring that speed, safety, and reliability are baked into every developer's workflow. Your Mission - Help Engineer the Golden Path: Design and implement highly automated CI/CD pipelines (GitHub Actions) and common templating (Typescript/Node) systems that allow a developer to go from "idea" to "production-ready service" in minutes. - GraphQL Infrastructure: Act as a core contributor to our central Apollo GraphQL API Gateway. You will help manage the supergraph composition, runtime stability, and schema governance standards to ensure a consistent contract for all consumers. - Help to Build the Internal Developer Platform (IDP): Help develop our Cloud Abstraction Layer and Developer Portal. This includes building self-service tools, CLIs, and service catalogs that reduce cognitive load for engineers. - SRE & Observability: Integrate "secure-by-default" practices and robust observability into the platform. You'll build dashboards (NewRelic) and monitoring patterns that provide teams with deep insights into their service health. - Technical Excellence & Advocacy: Write high-quality documentation, help with

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