Founding AI Engineer

Founding AI Engineer – London - £180K plus equity

Halian is currently working with a stealth-stage AI startup is hiring its first technical team member. If you want to build core AI systems from the ground up and move faster than a typical tech organisation ever allows, this might be for you.

What you’ll do

·Build the semantic intelligence layer of our product

·Design knowledge graphs, retrieval systems, and data pipelines

·Work across Python, LLMs, vector databases, and modern web technologies

·Make foundational technical decisions that shape the company’s trajectory

Tech you’ll work with

·Python, LLMs, vector databases, knowledge graphs

·React/TypeScript, Supabase, AWS

·Agent frameworks (e.g., LangChain, LangGraph)

What they are looking for

·Ownership mindset: You think like a founder and execute without waiting for instructions

·High energy: Positive attitude and genuine excitement about AI

·Adaptability: Comfortable with shifting priorities and an evolving stack

·Experience: 2–5 years building production AI systems in big tech or fast-moving startups

What you’ll get

·Founding team status + significant equity

·Chance to build AI infrastructure from scratch

·Ambitious, high-performance culture

·Competitive compensation, brand-new MacBook, central London office, team dinners, and more (perks are secondary to mission)

You’ll thrive if you have…

·Move fast and enjoy a high-urgency environment

·Have high agency and love solving complex problems

·Bring a strong track record of achievement—academically, professionally, or elsewhere

Location

London only (on-site). Relocation support is possible.

If you meet the above criteria and would like to be considered for this role then please click apply now.