Senior Software Engineer

F5 Consultants; Cardiff; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

F5 Consultants in the United Kingdom is seeking a strong C#/.NET and Azure engineer who has started building AI agents or LLM-powered applications. You will join a major technology consultancy supporting a public-sector client in Cardiff, combining solid development skills with practical AI experience.

No need to be an AI research expert; if you've built agents or LLM apps in your current role and can discuss what you created, this could be a great next step. Primarily remote with Cardiff visits.

Qualifications

• Strong C#/.NET and Microsoft Azure experience.
• Hands-on experience building LLM applications or AI agents.
• Exposure to Azure OpenAI, RAG, APIs or agent orchestration.

Skills

C#/.NET

Azure

LLM applications

AI agents

Tools

Azure OpenAI

APIs

Agent orchestration

RAG

Job description

Are you a strong C#/.NET and Azure engineer who has recently started building AI agents or applications using LLMs?

I'm working on an exciting opportunity with a major technology consultancy, supporting a public-sector client in Cardiff.

They're looking for an experienced software engineer who can combine solid development skills with practical, demonstrable AI experience.

You don't need to be an AI research expert. If you've been tasked with building agents or LLM-powered applications in your current role and can talk confidently about what you've built, this could be a great next step.

Key experience:

• Strong C#/.NET and Microsoft Azure
• Hands-on experience building LLM applications or AI agents
• Exposure to Azure OpenAI, RAG, APIs or agent orchestration
• Ability to explain and demonstrate your technical work

Working pattern: Primarily remote, with around 2-3 days per month in Cardiff

SC clearance eligibility required

Interview: One technical Teams interview