Senior Software Developer - .NET/C#, AI Solutions

Senior Software Developer - .NET/C# & AI - London Hybrid

Outside IR35 Contract

A leading technology-driven organisation within the Specialty Insurance sector is looking for a Senior Software Developer with strong .NET/C# expertise & recent hands-on experience delivering AI-enabled solutions.

This is an opportunity to join a high-performing engineering team working across business-critical digital platforms, modern cloud-based solutions & emerging AI initiatives supporting a rapidly growing international business.

The role will involve designing, developing & enhancing bespoke applications across the Microsoft technology stack, alongside exploring & implementing practical uses of AI & Generative AI within enterprise applications & development workflows.

This is a business-critical role supporting the continued modernisation of technology platforms & the adoption of new AI capabilities across the organisation.

The Role

• Design, build & enhance enterprise-grade applications & services using C# & .NET.
• Develop scalable solutions across a modern Microsoft technology stack.
• Design & develop AI-enabled functionality within existing & new applications.
• Integrate Generative AI/LLM capabilities into enterprise applications, APIs & services.
• Work with technologies such as Azure OpenAI, OpenAI APIs, Semantic Kernel or equivalent AI/LLM platforms.
• Apply practical knowledge of areas such as prompt engineering, RAG, embeddings, vector search & AI integration patterns, where appropriate.
• Contribute to architecture discussions & technical design decisions.
• Support the evolution & optimisation of existing business-critical platforms.
• Collaborate with Product Owners & business stakeholders to translate requirements into high-quality technical solutions.
• Drive improvements across testing, automation, deployment & software development processes.
• Review application security & API design to ensure alignment with established standards.
• Mentor & support other developers, helping to strengthen engineering capability across the team.

Skills & Experience

Essential:

• Strong commercial experience with C# / .NET Framework / .NET Core
• ASP.NET & Web API development
• SQL Server & relational database design
• RESTful API development
• Entity Framework, Dapper or similar ORM technologies
• Cloud-native application development
• Microservices & distributed architectures
• Agile delivery methodologies
• Test-Driven Development (TDD) & modern software engineering principles
• Recent, hands-on experience developing or integrating AI/Generative AI capabilities within applications
• Practical experience working with LLMs & AI APIs, ideally within the Microsoft/Azure ecosystem
• Strong understanding of how AI capabilities can be integrated securely & effectively into production software

Desirable:

• Azure OpenAI / OpenAI API experience
• Microsoft Semantic Kernel or similar AI orchestration frameworks
• RAG & vector-based search
• Prompt engineering & LLM integration
• Angular or other modern front-end frameworks
• Experience taking AI concepts or prototypes through to production or enterprise use

If you are a strong C#/.NET Developer who has recently been working hands-on with AI/Generative AI technologies & are looking for your next contract, please forward your profile for immediate review.