Senior Software Engineer
5 days ago
City of London
Senior Software Engineer (.NET / C#) | Greenfield Systems Rebuild | Remote | £80,000–£100,000 This is a hands-on senior engineering role with real technical authority. You will be the lead engineer and technical decision-maker on a greenfield rebuild of a mission-critical system, working within a small, senior team and reporting directly to the Head of Technology. Once the build is delivered, the role expands into enterprise architecture responsibilities. If you are a strong .NET engineer who has been moving into architecture and wants to own the outcome rather than advise on it, this is worth reading. THE ROLE • Lead the technical delivery of a greenfield rebuild of a core business system, covering policy, claims and integration layers., • Set and enforce technical standards, own code quality, and conduct structured code reviews across the delivery team., • Work directly with the BA to translate business requirements into sound technical design and produce low-level design documentation., • Make architecture decisions, present options clearly to non-technical stakeholders, and govern integration standards across the programme., • Support the Infrastructure and Data Engineers with cross-cutting technical decisions throughout the build., • Post go-live: take on broader enterprise architecture responsibilities including architecture governance, technology strategy and platform evolution planning. WHAT WE'RE LOOKING FOR Must-have • 5+ years in senior software engineering or technical lead roles, with strong hands-on .NET / C# delivery., • Demonstrable experience leading architecture decisions on production-grade systems, not just contributing to them., • REST API design and integration experience at scale, including defining and governing integration standards., • Microsoft SQL Server: schema design, query optimisation, and working knowledge of Always On configuration., • Azure infrastructure: practical experience with Azure VM, SQL on Azure and Availability Groups., • Experience mentoring or managing more junior engineers within a delivery team., • Comfortable producing and presenting design documentation to both technical and non-technical audiences. Nice-to-have • Prior experience in insurance, financial services or another regulated industry., • Familiarity with claims management systems, policy administration platforms or related workflows., • Python for automation, tooling or data engineering support., • Experience stepping into or transitioning from an enterprise architect or solutions architect position., • Active use of AI coding tools and a willingness to embed them into day-to-day engineering practice. WHAT'S ON OFFER • £80,000–£100,000 depending on experience., • Fully remote role with occasional travel to London when needed., • 28 days holiday plus bank holidays., • Private Medical Insurance for you and your family., • Pension with contributions matched up to 6%., • Life assurance., • Direct access to programme leadership, a senior multi-disciplinary team, and a clear path into enterprise architecture post-delivery. APPLY If this looks like the right next move, apply now or reach out directly for a conversation before committing to a full application. We are happy to talk through the detail first.