Senior Software Engineer – C# / .NET

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Software Engineer – C# / .NET based in United Kingdom. Join a globally distributed software organization developing innovative solutions that help consumer brands optimize operations, recover revenue, and grow across major retail marketplaces. As a Senior Software Engineer, you will take end-to-end ownership of product features, building reliable, scalable, and high-performance applications using C#, .NET, and modern web technologies. You will contribute to the continued development of an e-commerce operations platform that helps sellers manage inventory, listings, accounting, and business workflows. Working across the full stack, you will combine backend engineering expertise with frontend development using Vue.js or React and TypeScript. You will collaborate closely with Product, QA, and DevOps teams to deliver customer-focused solutions while improving system reliability and code quality. This fully remote independent contractor opportunity offers significant technical ownership, a product-led environment, and the chance to make a measurable impact within a growing international engineering team.