Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven

Skills

Job Specifications

Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven

We have a unique opportunity for a Senior .NET / Full Stack Developer to join a payments company.

As a Senior .NET / Full Stack Developer, you’ll play a key role in building and scaling a high-throughput payments platform as the business enters its next phase of growth. This includes launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally.

You’ll be building on top of 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 senior engineering role where you’ll contribute to architectural discussions, drive engineering best practices, and collaborate closely with other experienced engineers to deliver high-quality systems.

Working closely with Product, Data, Risk, and Platform teams, you’ll help evolve the platform architecture and deliver secure, scalable, and resilient distributed systems within a regulated fintech environment.

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

Up to £600/day Outside IR35

Initial 6-month contract

Responsibilities

Design and develop high-performance .NET services powering a global payments platform
Build and scale event-driven microservices running in Azure
Contribute to engineering best practices across architecture, coding standards, observability, and reliability
Work closely with product teams to design API-driven payment and partner integrations
Collaborate with other engineers to deliver high-quality, maintainable systems
Help evolve a scalable distributed architecture capable of handling high transaction volumes
Contribute to improving engineering velocity, delivery quality, and platform resilience

What we’re looking for

Strong experience building production systems with .NET / C#
Experience building cloud-native systems in Azure
Experience with event-driven architectures (e.g., Kafka, Service Bus, Event Grid, messaging systems)
Proven experience building distributed systems and scalable APIs
Experience working on payments platforms, fintech systems, or high-throughput transactional platforms
Strong understanding of system design, reliability, and performance at scale

Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven

About the Company

From start-ups to unicorns, you need great people to grow, so at VirtueTech we do recruitment differently. We believe companies are defined by their people, so connecting clients and candidates through mu-tual values is key for a thriving business. With a joint brand mission being paramount for success, you need an agency aligned with that purpose. Which is precisely where we come in... At VirtueTech jobs are more than just a salary, they're a passion. So we understand and reflect our clients values, in both ourselves and... Know more

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