Fonoa
Senior/Staff Software Engineer, AI
London, United Kingdom, Remote. Posted 6 months ago
The role
You will build AI-powered product features and intelligent workflows. You will work on backend services, prompt optimization, and agent platforms to integrate AI into the product.
What you will do
- Build AI-powered product features
- Partner with product and design to prototype intelligent workflows
- Design backend services for natural language interfaces and agentic systems
- Optimize prompts, shape model behaviour, and improve evaluation pipelines
- Build and evolve internal and external agent platforms
- Enable technical and non-technical teams to leverage AI
- Experiment, iterate, and improve AI systems in production
Required qualifications
- 5+ years building customer-facing products at a high-quality software company
- Strong track record of delivering complex, end-to-end product features
- Ability to shape problems and drive solutions independently
- Deep understanding of LLMs, prompt engineering, agent frameworks, and AI safety/security practices
- Experience with RAG architectures and model evaluation
- Strong product and engineering instincts
- Comfortable operating in fast-moving, ambiguous environments
- Proven ability to experiment and deliver in an evolving technology landscape
About the company
Engineering is central to how Fonoa builds the business. They focus on solving real customer problems using small, high-trust teams with full ownership.