> Markdown version of [/jobs/ext/2821605-senior-software-engineer](https://www.wearedevelopers.com/jobs/ext/2821605-senior-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Capital on Tap - **Location:** London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Flutter, JavaScript (Programming Language), .NET Framework, Agile Methodology, Unit Testing, Microsoft Azure, C Sharp (Programming Language), Databases, Software Debugging, Microsoft SQL Server, MongoDB, Software Engineering, .NET Core, ReactJS, Backend, Integration Tests, Dart, Front End Software Development - **Published:** September 10, 2026 - **Apply:** https://www.collegerecruiter.com/job/2840576992-senior-software-engineer ## About the Role * Minimum 5 years hands-on experience in C#, .Net Core and SQL Server; experience in JavaScript and React is desirable. * Proficiency in unit and integration testing. * Strong grasp of database technologies. * Experience with Agile development practices. * Passion for learning new technologies. * Proactive, supportive, and collaborative team player. Technical Stack * Backend: C#, .Net, .Net Core * Frontend: React, JavaScript * Mobile: Flutter, Dart * Databases: SQL Server, MongoDB * Cloud: Azure, GCP ## Description We are looking for Senior Full-Stack Engineers to build credit card and payment products for small businesses. This hybrid role is based in London, Moorgate office, and requires in-office work two days a week., * Own the software development life cycle from coding to production, monitoring and continuous improvement. * Craft responsive user interfaces with modern JavaScript frameworks such as React. * Collaborate with product managers, QA and fellow engineers. * Write unit and integration tests to keep the software reliable. * Troubleshoot and resolve bugs. * Bridge technical and business teams to align goals. ## Related Videos - [Intro to Flutter Development](https://www.wearedevelopers.com/videos/170-intro-to-flutter-development) - [Flutter Packages and Plugins - A Look Under the Hood](https://www.wearedevelopers.com/videos/555-flutter-packages-and-plugins-a-look-under-the-hood) - [Dart - a language believed dead, experiences a new bloom](https://www.wearedevelopers.com/videos/442-dart-a-language-believed-dead-experiences-a-new-bloom) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Writing truly cross plattform applications using flutter](https://www.wearedevelopers.com/videos/456-writing-truly-cross-plattform-applications-using-flutter) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) ## Related Articles - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Basic And Advanced Networking in Dart and Flutter](https://www.wearedevelopers.com/magazine/112-basic-and-advanced-networking-in-dart-and-flutter) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Flutter Developer Salary [2023]](https://www.wearedevelopers.com/magazine/199-flutter-developer-salary-2023)