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# Senior Full Stack Developer

- **Company:** 17918
- **Location:** Broughton, UK (Remote available)
- **Experience:** Expert
- **Salary:** £65,000.0 - £85,000.0
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), Automation of Tests, Microsoft Azure, C Sharp (Programming Language), Cloud Computing, Relational Databases, Online Banking, Microsoft SQL Server, Mstest, Systems Integration, TypeScript, ReactJS, Backend, Event Driven Architecture, React Native
- **Published:** October 19, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/senior-full-stack-developer/52628772

## About the Role

durable/idempotent scheduled jobs Cloud & platform: Azure, .NET Aspire, containerised services Mobile: Expo / React Native (TypeScript) Integrations: Open Banking, VRP, BaaS, identity verification, credit decisioning Practices: ADR-driven architecture, EF Core migrations, automated testing (MSTest, NSubstitute, FluentAssertions) What you'll do Design and ship features spanning the C# backend and the React Native app Model financial domains carefully money, fees, timing differences, ledgers where precision is non-negotiable Build resilient, idempotent background processing for payment execution and scheduling Integrate with external banking, payments, and identity providers Contribute to architectural decisions What we are looking for Strong commercial experience with C# / .NET and modern TypeScript Solid EF Core / relational database skills (SQL Server ideal) Experience building and consuming APIs, and working with asynchronous/message-based systems React Native (Expo) experience, or
strong React skills and appetite to work across mobile A pragmatic, quality-first mindset you care about correctness, testing, and clear design Bonus: FinTech / payments / Open Banking experience, cloud (Azure), event-driven architecture Experience: C#: 5 years (required) React Native: 2 years (required) Work authorisation: United Kingdom (required) Work Location: Hybrid remote in Manchester £65k-£85k salary depending on experience Hybrid working from our Manchester office 25 days holiday + bank holidays Pension, and the chance to shape a product (and a team) from an early stage Meaningful ownership and a direct line to the impact of your work Sound like you? Apply with your CV and a short note on something you've built that you're proud of. TPBN1_UKTJ

## Description

About us We'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 role We'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 with Backend: .NET 10 / C#, EF Core (SQL Server), a service-oriented solution with clean domain boundaries Async & messaging: MassTransit, background workers