Senior Software Engineer Salary: £75,000 base bonus equity Location: Remote‑first (UK) — candidates must be based in West London or Oxfordshire Type: Permanent, Full-time The Opportunity We’re recruiting a Senior Software Engineer to join a UK‑based technology team working on a large‑scale, high‑impact digital platform. This is a remote‑first role offering flexibility, with occasional in‑person collaboration for candidates based in West London or Oxfordshire. You’ll join a collaborative, delivery‑focused environment where engineers take ownership from design through to production, with a strong emphasis on quality, performance, and continuous improvement. The Role As a Senior Engineer, you’ll act as a technical specialist with responsibility for end‑to‑end feature delivery. Depending on your background, the role can be backend‑focused or full‑stack, with involvement in architectural decisions and hands‑on development across modern, cloud‑hosted systems. Key Responsibilities Design and build scalable, maintainable software solutions using modern engineering practices Take ownership of features from initial concept through to production deployment Contribute to architectural discussions and technical direction Ensure performance, reliability, and security through proactive design and testing Apply shift‑left testing practices, including unit, integration, and performance testing Mentor junior engineers through code reviews, technical guidance, and knowledge sharing Collaborate closely with product, QA, and UX teams in an agile environment Use modern development and AI‑assisted tools to improve productivity and code quality Essential Skills & Experience Strong commercial experience with C# / .NET (backend) or full‑stack development using modern frontend frameworks Solid understanding of microservices, APIs, and distributed systems Experience with Azure, CI/CD pipelines, containerisation, and cloud‑native development Strong testing mindset, including automated and performance testing Experience working with SQL Server and data modelling Ability to solve complex technical problems and communicate solutions clearly Experience mentoring or supporting the development of other engineers Nice to Have Experience in regulated or high‑availability environments Exposure to AI or machine‑learning‑enabled systems Experience with TDD, DDD, or BDD Background in performance‑critical or highly scalable platforms What’s on Offer £75,000 base salary Bonus and equity package Remote‑first working model Interesting technical challenges in a modern engineering environment Strong culture of ownership, collaboration, and continuous improvement