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Founding AI Engineer - London at Saturn

Saturn
England, GB
Full-time
$102K–$118K
Estimated
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Required Skills

LLM-based agent design
Retrieval-augmented generation
Prompt engineering
Python back-end development
NLP fundamentals

Job Description

Applied AI Engineer

We’re a high-growth B2B fintech startup revolutionising financial services with AI. Imagine Harvey AI for Financial Services – our mission is to democratise financial access for 1 billion people.

About the Role

We’re looking for a hands-on AI Engineer, super passionate about AI engineering, to design and scale AI agents. Join our dynamic, friendly, close-knit team to build impactful LLM-powered solutions at speed.

Responsibilities

  • Build and refine LLM-based agents, focusing on retrieval-augmented generation and data retrieval systems

  • Develop robust AI evaluation frameworks, metrics, and methodologies

  • Demonstrate NLP fundamentals (tokenisation, embeddings, LLM understanding)

  • Practise prompt engineering (few-shot, role-based, …), continuously testing and optimising prompts with tools like Weave or Laminar

  • Balance constraints (token limits, cost, speed) while maintaining clear, structured outputs

  • Apply back-end expertise for data-intensive applications, writing clean, modular Python code and performing quick data processing What Values We’re Looking For and what you can expect the Saturn team to be:

  • Pursue Greatness: Strive for excellence in everything you do, iterating, learning, growing, and embracing discipline to drive progress.

  • Earn Trust: Build strong relationships through integrity, transparency, and delivering on your promises.

  • Seek Truth: Be data-driven, curious, and unafraid to challenge assumptions in pursuit of the best solutions.

  • Be Audacious: Dream big, take ownership, take calculated risks, and push boundaries to create meaningful progress.

  • Orbit Together: Collaborate with a shared mission, knowing collective success drives greater outcomes. Technical Must-Haves

  • LLM-based agent design with retrieval-augmented generation

  • Proficiency in AI evaluation frameworks, NLP fundamentals (tokenisation, embeddings, LLM architecture), and bias handling

  • Prompt engineering with systematic experimentation (tools like Weave or Langsmith)

  • Strong Python back-end skills for data-intensive systems and data processing

  • Ability to balance token limits, cost, and speed while producing structured outputs What We Offer

  • Competitive salary and meaningful early-stage equity

  • Autonomy and ownership in your work

  • Budget for learning and professional growth

  • Access to world-class gym and wellness

  • Bi-annual team retreats

We can also sponsor a visa if you are from India or US. About Us

We’re Saturn, the fast-growing B2B startup (top in S24 batch) and are backed by top-tier investors. We’re building a game-changing platform to bring financial peace of mind to billions worldwide.

Job Details

Employment Type

Full-time

Salary Range

$102K–$118K

Estimated

Location

England, GB