Full Stack AI Engineer

Oakwell Hampton Group; United Kingdom; Hybrid; GBP 75,000 - 100,000; Full time

Benefits offered by this job

Competitive salary

Meaningful equity

Remote-first working

Job summary

A VC-backed AI start-up in the UK is seeking a Founding Full Stack AI Engineer. In this full-time role, you’ll design scalable APIs, optimize RAG pipelines, and integrate leading AI models. Ideal candidates have 5+ years of full-stack experience, particularly with Python and React. This remote-first position offers competitive pay and startup equity, fostering innovation and autonomy.

Qualifications

• 5+ years’ full-stack experience with Python + React/Next.js.
• Proven hands-on AI engineering experience.
• Familiarity with RAG systems and embeddings.

Responsibilities

• Designing secure, scalable APIs.
• Building and optimising RAG pipelines.
• Integrating OpenAI / Bedrock models.

Skills

Python

React

FastAPI

RAG systems

Embeddings

Hybrid search

Tools

AWS

Docker

ECS

LangChain

LlamaIndex

Job description

Founding Full Stack AI Engineer

🌍 Remote UK (occasional travel to London or Leeds)

A VC‑backed AI start‑up on a mission to transform how deals get done is looking for a Founding Full Stack AI Engineer to join their fast‑moving team. You’ll play a pivotal role in shaping the product and technical vision from day one—building a scalable platform that blends cutting‑edge AI with a slick user experience. This is the perfect role for someone who thrives in an early‑stage environment, enjoys tackling complex problems end‑to‑end, and wants their code to have immediate, visible impact.

What You’ll Be Doing

• Designing secure, scalable APIs in Python/FastAPI
• Building and optimising Retrieval‑Augmented Generation (RAG) pipelines
• Owning vector databases (pgvector, Weaviate, FAISS) and embedding strategies
• Integrating OpenAI / Bedrock models and developing guardrails & evaluation flows
• Ingesting and structuring data for high‑performance retrieval and analytics
• Building clean, fast UIs with React / Next.js
• Shaping cloud architecture (AWS, Docker, ECS) and CI/CD pipelines
• Working directly with the founders to set the product and technical roadmap

What You’ll Bring

• 5+ years’ full‑stack experience with Python + React/Next.js
• Proven hands‑on AI engineering — RAG systems, embeddings, hybrid search
• Familiarity with LangChain / LlamaIndex and LLM evaluation tools a bonus
• Start‑up mindset — proactive, hands‑on, and comfortable with ambiguity
• Founding‑team impact with meaningful equity
• Build a groundbreaking AI product from the ground up
• Flexible remote‑first working, with optional London meetups
• Competitive salary and a culture that values innovation and autonomy

Sound like a good fit? Hit apply and let’s chat!

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Staffing and Recruiting

Salary: £75,000 – £100,000