Senior Engineer

My client are looking for a UK-based remote • • Senior API Product Engineer • • • Outside IR35 • 5 months initially (good chance of extension) • Remote • • Overview • • You build and own APIs as products. You focus on outcomes, not tickets. You work hands-on across the full API lifecycle. You follow platform standards while contributing to shared tooling and patterns. This role suits someone who blends strong engineering with product ownership. • • What you will do • • • • Design and build APIs • • Design APIs aligned to agreed standards, including naming, versioning and security, work with domain data models, build REST and event-driven APIs, keep consistency across platform patterns • • Use and improve platform tooling • • Use shared CI/CD pipelines, templates and reference architectures • Follow established patterns • Improve and contribute reusable API assets • • Own the full API lifecycle • • • Design, build, test, deploy and operate APIs • Manage versioning strategy • Maintain backward compatibility • • Deliver integrations • • • Integrate with internal systems and data platforms • Handle data transformation across services • Apply synchronous and asynchronous patterns • Build for resilience, including retries, timeouts and fallback • • Implement security • • • Apply authentication, including OAuth2 and client credentials • Follow platform-led authorisation models • Align with central identity approaches • • Enable observability • • • Implement logging, metrics and tracing • Support monitoring through shared platform tools • Ensure services remain observable and supportable • • Collaborate across teams • • • Work with QA, platform engineering and product stakeholders • Contribute to engineering standards and governance forums • Align with wider delivery and architecture direction • • Deliver in an agile environment • • • Ship iteratively under tight timelines • Manage cross-team dependencies • Balance speed with compliance to standards • • What you bring • • • • Technical experience • • • Strong API engineering across REST and event-driven systems • Experience with cloud-native development, ideally Azure • CI/CD and infrastructure as code awareness • Strong understanding of integration patterns, sync and async • Experience implementing OAuth2 security • Familiarity with API management platforms • • Platform mindset • • • Comfortable working within guardrails • Experience using shared tooling and frameworks • Pragmatic approach to standardisation vs flexibility