On behalf of National Savings andamp; Investments, we are looking for an Integration Architect (Inside IR35) for a 5 month contract based Hybrid in London, Lytham, Durham or Glasgow. We are seeking an experienced Integration Architect to support a major Core Banking Transformation programme, with a focus on API and integration architecture across complex systems. This role combines hands on design input with architecture governance, including reviewing, validating and signing off integration designs, while also working closely with product teams and suppliers to shape API strategy, drive consistency and ensure alignment with enterprise standards and regulatory requirements. The architect will act as a key coordination point across Architecture, Development and Testing teams, as well as multiple delivery partners within a fast-paced transformation environment. As an Integration Architect, your main responsibilities will be to:. Review, validate and formally sign off integration and API designs, ensuring alignment with enterprise architecture, target state and non-functional requirements.. Collaborate with product, delivery and supplier teams to define API requirements, shaping solutions and identifying opportunities to reuse existing services versus build new capabilities.. Support the full API life cycle including design, documentation, onboarding, optimisation and adherence to best practice standards.. Review integration solutions implemented on IBM CloudPak, ensuring ..... full job details .....