Senior Full Stack .NET Engineer (React / APIs)Location: UK - Remote first, but open to 1 day, twice per month or monthly day in PortsmouthAbout the RoleWe are looking for a highly skilled Senior Full Stack Engineer to join a collaborative development team working on a complex, integration-focused platform. This is a product-focused role where you will design, build, and maintain scalable, high-performance web applications that support real-time operational workflows.You will play a key role in shaping system architecture, delivering robust solutions, and supporting critical production systems.Key ResponsibilitiesDefine system objectives by analysing user requirements and business needsDesign and develop web applications using C#/.NET (ASP.NET Core) and modern frontend frameworksBuild and maintain RESTful APIs and integration servicesContribute to architectural decisions, evaluating technical solutions and trade-offsCollaborate with cross-functional teams to enable system interoperabilityTroubleshoot development and production issues across multiple environmentsSupport high-availability systems with ongoing maintenance and monitoringParticipate in Agile development processes and team discussionsMaintain high standards through code reviews, testing, and continuous improvementProvide guidance, mentoring, and technical support to other developersCreate documentation and tools to support system usage and maintenanceStay up to date with emerging technologies and best ..... full job details .....