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Senior Software Developer - .NET/C# & AI

Hybrid in London·Added 2 days ago (last checked 11 Nov)

Agency
Pioneer Search

5 open roles

Our summary

Work mode
Hybrid, London
Contract
Contract role, outside IR35
Experience
Senior level
Closing date
Apply by Sunday 10 January 2027

Skills

Nice to have

Requirements

What we're looking for

  • 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

Nice to have

  • 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

The role

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.

What you'll do

  • 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.

Desirable

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.

About Pioneer Search

Industry
Recruitment

In their own words

Additional information

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