AI Engineer - London at Saturn

Saturn is a high-growth B2B fintech startup (YC S24) revolutionizing financial services with AI — an AI-powered operating system for wealth management built to automate investment research, streamline operations, and ensure compliance. Supporting 200+ firms globally managing £35bn+ in assets.

As an AI Engineer, you will build and refine LLM-based agents focusing on retrieval-augmented generation and data retrieval systems, develop robust AI evaluation frameworks, practice prompt engineering using tools like Weave or Laminar, and balance constraints like token limits and cost while maintaining clear outputs. Apply back-end expertise for data-intensive applications with clean, modular Python code.

Requirements:

Deep experience with agentic systems

Expertise in RAG pipelines

Systematic prompt engineering

Agentic workflow orchestration

Defining reliability trade-offs for production systems

Salary: £70,000 - £100,000 GBP

Location: London, United Kingdom (on-site)

Requires 3+ years experience