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Mobile and Backend Software Engineer - Banking

London💼 Full-time🗓 2026-07-09 → 2026-09-26

Core

Design and build robust, scalable back-end services for Banking and Repayments while contributing to mobile development to transition ownership from the Customer Experience team.

Role type

Senior IC mobile and backend software engineer (fintech)

Builds

Core account experience, transaction lifecycles, balance management, repayment rails, and savings products for small business customers

Domain

Fintech / Banking

Deliverable

production ML models | product features

Required skills

C#/.NET, Flutter/Dart, Kotlin, Swift, SQL Server, MongoDB, Firestore, GCP, Azure, CI/CD, unit testing, integration testing

Preferred skills

Open banking integration, Cross-functional collaboration, Agile methodology

Technologies

C#, .NET, .NET Core, Flutter, Dart, Riverpod, GoRouter, Kotlin, Swift, SQL Server, MongoDB, Firestore, GCP, Firebase, Azure, CodeMagic

Responsibilities

Design and build scalable back-end services; Own the full SDLC from inception to production; Contribute to mobile development across iOS and Android; Write thorough unit and integration tests; Identify bottlenecks and drive improvements; Collaborate with Product, Design, and QA

Seniority

Senior, hands-on IC

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