Senior Developer / Architect ( .Net / React / React Native / Azure ) Hybrid - Central / West London & WFH Circa £75,000 - £90,000 + Bonus and good benefits An exciting opportunity for a hands-on Senior Developer eager to make a real impact with architectural skills and deep experience in C# / .Net, React, React Native, and Azure. Our client is launching a major initiative to bring development in-house, and you'll be a key player as they migrate a monolithic booking system to .Net 10 Azure-native microservices. The Senior Developer will mentor a small team of mid-level developers and be hands on writing C# production code, React web portals and the React Native mobile screens themselves. They'll be making pragmatic architectural decisions that keep delivery front and centre. It's a hybrid role with the flexibility to work from home on Mondays and Fridays. Key Responsibilities include: * Implement complex C# microservices — Minimal APIs, Worker Services, DAPR integration, .NET Aspire orchestration * Build and own the React web portal — component architecture, TypeScript, React Query, state management * Lead React Native mobile development for the app — Expo / bare workflow, push notifications, offline sync * Design the anti-corruption layer translating legacy domain concepts into DDD aggregates * Make lightweight but durable architectural decisions (ADRs) * Mentor mid-level developers Key Skills required: * C# / .NET 8 onwards at expert level — Minimal APIs, async patterns, Worker Services, EF Core, .NET Aspire * React / TypeScript — expert level; hooks, context, React Query, component libraries, portal development * React Native — production mobile app experience; Expo, offline-first patterns, platform-specific APIs * Azure cloud-native — AKS / Container Apps, Service Bus, API Management, Blob Storage, Azure DevOps * Microservices patterns — strangler fig, DAPR pub/sub, saga orchestration, transactional outbox * DDD fundamentals — bounded contexts, aggregates, domain events, CQRS * SQL Server — schema design, EF Core migrations, query performance tuning This role is perfect for those who thrive in small, flat-structured teams and collaborative environments where every contribution makes a difference. Salary will reflect experience, with a likely range of £75,000 - £90,000, plus bonus, company pension contributions, and other benefits. For further information, please send your CV to Wayne Young at Young's Employment Services Ltd. YES are operating as both a recruitment Agency and Recruitment Business