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# Senior Full Stack Developer

- **Company:** Spliit LTD
- **Location:** Manchester, UK
- **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:** August 12, 2026
- **Apply:** https://uk.indeed.com/viewjob?jk=e0e08970595bac6e

## About the Role

* 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

## Description

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, 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


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