Senior Full Stack Developer

Location: Manchester (Hybrid — typically 2–3 days/week in-office)Salary: £65,000 – £85,000 + benefits (DOE)Type: Permanent, full-timeAbout usWe're a Manchester-based FinTech building a smarter way for tenants to pay rent. Our platform pays landlords the full rent on time and collects smaller instalments from tenants via Open Banking Variable Recurring Payments (VRP). We're a small, high-trust engineering team solving genuinely hard problems in payments, credit, and financial correctness — where getting the maths and the money movement exactly right matters.The roleWe're looking for a Senior Full Stack Developer to own features end-to-end across our .NET backend and React Native mobile client. You'll work close to the domain — instalment maths, double-entry ledgers, scheduled money movement, and third-party integrations with banking and identity providers. This is a hands-on senior role with real ownership and influence over architecture.What you'll work withBackend: .NET 10 / C#, EF Core (SQL Server), a service-oriented solution with clean domain boundariesAsync & messaging: MassTransit, background workers, durable/idempotent scheduled jobsCloud & platform: Azure, .NET Aspire, containerised servicesMobile: Expo / React Native (TypeScript)Integrations: Open Banking, VRP, BaaS, identity verification, credit decisioningPractices: ADR-driven architecture, EF Core migrations, automated testing (MSTest, NSubstitute, FluentAssertions)What you'll doDesign and ship features spanning the C# backend and the React Native appModel financial domains carefully — money, fees, timing differences, ledgers — where precision is non-negotiableBuild resilient, idempotent background processing for payment execution and schedulingIntegrate with external banking, payments, and identity providersContribute to architectural decisionsWhat we are looking forStrong commercial experience with C# / .NET and modern TypeScriptSolid EF Core / relational database skills (SQL Server ideal)Experience building and consuming APIs, and working with asynchronous/message-based systemsReact Native (Expo) experience, or strong React skills and appetite to work across mobileA pragmatic, quality-first mindset — you care about correctness, testing, and clear designBonus: FinTech / payments / Open Banking experience, cloud (Azure), event-driven architectureBenefits£65k–£85k salary depending on experienceHybrid working from our Manchester office25 days holiday + bank holidaysPension, and the chance to shape a product (and a team) from an early stageMeaningful ownership and a direct line to the impact of your workSound like you? Apply with your CV and a short note on something you've built that you're proud of.