Mid-Level .NET / Full Stack Developer – Hybrid – £450/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven

We have a great opportunity for a Mid-Level .NET / Full Stack Developer to join a growing payments company.

As a .NET Developer, you’ll be working as part of an experienced engineering team building and scaling a high-throughput payments platform. The business is entering its next phase of growth, launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally.

You’ll be contributing to a modern, cloud-native platform built with .NET and Azure, designed around API-first architecture and event-driven microservices. The platform supports complex payment flows, partner integrations, and high-volume transaction processing.

This is a hands-on development role where you’ll work closely with senior engineers to deliver reliable, scalable systems while continuing to develop your technical expertise within a modern fintech environment.

Working closely with Product, Data, Risk, and Platform teams, you’ll help build secure, scalable services that power real-time financial transactions.

📍 2–3 days per week in the office – City of London

💰 Up to £450/day Outside IR35

🗓️ Initial 6-month contract

Responsibilities

Build and maintain .NET services powering a global payments platform
Contribute to event-driven microservices running in Azure
Develop and maintain RESTful APIs used by internal systems and external partners
Collaborate with senior engineers on system design and implementation
Write clean, maintainable, and well-tested code
Participate in code reviews and engineering best practices
Support the team in delivering scalable and reliable distributed systems

What we’re looking for

Experience developing applications with .NET / C#
Exposure to cloud platforms such as Azure
Experience building or consuming REST APIs
Understanding of microservices or event-driven architectures
Experience working in agile engineering teams
Interest in building high-scale transactional systems

Apply Now

Mid-Level .NET / Full Stack Developer – Hybrid – £450/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven

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