Senior .NET Developer

Senior .NET Developer | £650/day Inside IR35 | C# | .NET 8+ | Azure | Event-Driven | Greenfield Modernisation A leading energy trading firm, currently undergoing a significant technology platform rebuild following exceptional business growth, is looking for multiple Senior .NET Developers to join their engineering team. This is an opportunity to work on the modernisation of several business-critical trading applications, including Settlements, Trade Capture and Trade Operations, as the business moves away from legacy technology towards a modern .NET 8+ architecture. As a Senior C# .NET Developer, you'll play a key role in designing and building scalable backend services and distributed applications that underpin the next generation of energy trading operations. You'll work on greenfield development projects, contributing to technical design and architectural decisions while helping build highly scalable, resilient and maintainable systems using modern engineering practices. Working alongside experienced engineers, architects and business stakeholders, you'll be involved throughout the full software development lifecycle — from technical design and development through to testing, deployment and continuous improvement. The successful Senior .NET Developer will have strong experience with C#, .NET Core/.NET 8+, Azure, distributed systems and event-driven architecture, together with a solid understanding of software design and development principles. Previous experience within Energy Trading is not required. 💰 £650/day – Inside IR35 🗺️ Hybrid working – 3 days per week in London 📆 Rolling contract – extensions expected 🚀 Start date: ASAP 💻 Technology: C#, .NET 8+, Azure, Event-Driven Architecture, Distributed Systems, REST APIs Key Responsibilities Design and develop high-quality, scalable applications using C# and .NET 8+Build robust, distributed backend services and APIsContribute to technical architecture and system design decisionsDesign and implement event-driven and distributed systemsDevelop highly maintainable, testable and resilient softwareWork with Azure and modern cloud-based technologiesContribute across the full software development lifecycleTake ownership of technical solutions and deliver high-quality production softwareWork closely with architects, engineers and business stakeholders to understand requirements and deliver effective solutionsApply modern engineering practices including CI/CD, automated testing, Agile delivery and code reviewsHelp drive the migration from legacy platforms towards a modern .NET architectureIdentify opportunities to improve system performance, scalability, reliability and maintainabilityMentor and support less experienced developers where appropriate Key Skills & Experience Strong commercial experience with C# and .NET / .NET CoreStrong experience with .NET 8+Proven experience building scalable backend services and REST APIsStrong understanding of SOLID principles, design patterns and software architectureExperience with distributed systems and event-driven architectureExperience working with AzureStrong understanding of asynchronous programming and messaging If you're interested in this Senior C# .NET Developer opportunity, please apply with your most recent CV to josh@virtuetech.io Senior .NET Developer | C# | .NET 8+ | Azure | Distributed Systems | Event-Driven Architecture | Energy Trading | Greenfield Development | £650/day Inside IR35