Job Detail

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

Web Development Contractor
ID: #1260
Posted: 2026-03-11
Salary

Description

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

Hard Skills 5
Skill Source Confidence
API Integration llm_hard
100%
Azure (Microsoft) llm_hard
100%
Microservices llm_hard
100%
Event-Driven Architecture llm_hard
100%
REST API llm_hard
80%
Soft Skills 0

No soft skills extracted

Apply Options
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LinkedIn No Apply
Talents By StudySmarter No Apply
LinkedIn No Apply
API Logs for this Job
Query Country Status Response ms Created
Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven extracted 3650 2026-03-21 22:54
Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven classified 519 2026-03-21 18:55
graduate web developer in United Kingdom gb duplicate 20448 2026-03-21 16:02
junior full stack developer in United Kingdom gb duplicate 29053 2026-03-21 15:40
junior web developer in United Kingdom gb processed 13421 2026-03-21 15:18
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