Senior Software Engineer (Full time perm) Hybrid, Newcastle (remote considered)We are looking for a Senior Software Engineer with deep expertise in C#/.NET to drive the evolution of server-side systems within a fast-scaling environment.You''ll play a pivotal role in shaping the technical foundation of a growing platform, helping move from strong product-market fit into the next phase of growth.This role goes beyond feature delivery you''ll be instrumental in defining how backend services are built, scaled, and modernised, with a particular focus on extending AI-powered capabilities.Working at the core of a widely used product, you''ll tackle complex technical challenges while influencing architectural direction across the wider engineering organisation.What You''ll DoDefine and evolve server-side architecture and technical direction in line with business and product goalsLead development of robust back-end services and APIs using C# and .NET Core/.NET 6+Optimise system performance, security, and scalability for a growing user baseAdvise on architectural decisions across microservices, data storage, AI, and integrationsCollaborate with product teams and stakeholders to shape technical strategy and roadmapLead by example, maintaining high standards for code quality, testing, and performanceMentor engineers, supporting growth and continuous improvementInfluence engineering culture, processes, and technical strategy across the organisationDrive improvements in tooling, ..... full job details .....