Solution Architect - B2B Payments TransformationContract: 6 monthsRate: £600-£650 per day (Outside IR35)Location: London, HybridAn experienced Solution Architect is required to lead end-to-end architecture for a large-scale B2B banking RTL and Payments Transformation programme within a complex financial services environment. This role will own solution design across multiple workstreams, ensuring a cohesive, scalable and resilient architecture aligned to regulatory, operational and commercial requirements.The programme spans core B2B banking capabilities, including payments, reconciliation, KYC, cash management, monitoring and billing. You will play a central role in shaping an event-driven architecture, working closely with senior stakeholders, peer architects and offshore delivery teams, while providing strong architecture governance and design assurance.Key ResponsibilitiesOwn solution architecture and high-level design across multiple workstreamsDefine and govern event-driven architecture patterns including streaming and asynchronous integrationManage cross-domain dependencies and complex integrations across B2B banking platformsLead architecture governance, design approvals and technical decision-makingEnsure non-functional requirements are met, including scalability, resilience, security and complianceFacilitate design workshops and maintain the solution architecture roadmapCollaborate effectively with onshore and offshore teamsRequired ExperienceStrong background in So