Tech Lead / Senior Software Engineer / Software Architect

Tech Lead / Senior Software Engineer / Software Architect.NET C# Python AI Architecture London (Hybrid)Permanent: 80,000 - 110,000 + BenefitsOR Contract: 600 - 700 per dayLocation: London City (1-2 days per week)OverviewWe''re working with a well-known global organisation embarking on a major transformation of one of its core business-critical platforms. This is an opportunity to play a leading role in modernising a legacy product, improving its architecture, integrating it with wider enterprise systems, and introducing AI capabilities into both the product itself and the software development lifecycle. Rather than a large-scale rewrite, the platform will be modernised incrementally, requiring someone who can balance strategic architectural thinking with hands-on engineering delivery. You''ll help shape the future technical direction while remaining close to the code. This role would suit an experienced Tech Lead, Senior Software Engineer or Software Architect who enjoys solving complex technical problems and building modern, scalable software.Role and ResponsibilitiesLead the technical design and evolution of a large-scale business-critical platform.Improve the existing architecture and define a pragmatic roadmap towards a modern, scalable solution.Design and build new features using .NET, C# and Python.Introduce AI-powered capabilities into the product to improve functionality and user experience.Drive the adoption of AI-assisted software development tools and engineering ..... full job details .....