Full Stack Engineer / Founding Team (Typescript + Python)

Voice AI Space; Remote; GBP 70,000 - 90,000; Full time

Job summary

A pioneering AI commerce company in the United Kingdom is seeking an experienced engineer to help build scalable architecture for its AI agent. The role requires deep fluency in Typescript, JavaScript, and Python, with responsibilities spanning back-end services and full-stack development. This remote-first position offers high autonomy, competitive salary, and equity participation, working closely with the founding team to shape the company's future.

Benefits

Competitive salary

Meaningful equity

Remote-first work environment

High autonomy and broad scope

Qualifications

• 7+ years of engineering experience spanning back-end and full-stack roles.
• Deep fluency in Typescript/JavaScript and Python.
• Production experience with modern frameworks (NestJS or similar, React/Next.js).
• Strong database skills (SQL + NoSQL), caching strategies, and system design instincts.
• Cloud expertise (GCP preferred, AWS/Azure fine), plus containerization (Docker, Kubernetes) and CI/CD pipelines.
• Hands-on experience building with LLMs: prompt design, orchestration, RAG, and evaluation harnesses.
• Startup-ready: you’re comfortable when you are the process.

Responsibilities

• Design and build core back-end services and APIs (NestJS + Python).
• Scale real-time infrastructure to support production traffic and low-latency AI.
• Build integrations with external tools and data via MCP.
• Optimize performance, cost, and reliability of LLM flows.
• Own CI/CD pipelines and help set our infrastructure playbook.
• Partner directly with the founder to shape product direction and technical strategy.

Skills

Typescript

JavaScript

Python

NestJS

React

Next.js

SQL

NoSQL

Docker

Kubernetes

Tools

GCP

Redis

Postgres

Job description

About Us

We’re a stealth company building the future of agentic commerce. As part of our founding team, you’ll help establish the infrastructure and operational foundation for a product that has the potential to transform how millions of eCommerce companies sell, creating truly immersive shopping experiences for customers. You’ll have a unique opportunity to shape the product, company culture, and our long-term success.

Position Overview

As engineer #2, you’ll play a crucial role in designing and building the scalable, real-time architecture that powers our AI agent. You’ll work across the stack—back-end services, APIs, and front-end features—to deliver seamless mobile and web experiences. This is a hands-on role where you’ll operate directly with the founding engineer, iterating quickly and shipping production code that sets the tone for everything that follows.

Key Responsibilities

• Design and build the core back-end services and APIs (NestJS + Python) that power our AI agent.

• Scale real-time infrastructure (LiveKit, GCP, Redis, Postgres) to support production traffic and low-latency AI.

• Build integrations with external tools and data via MCP.

• Contribute across the stack—from back-end to front-end (vanilla JS/React/Next.js) and mobile integration—wherever needed.

• Optimize performance, cost, and reliability of LLM flows (prompt chains, RAG pipelines, guardrails).

• Own CI/CD pipelines (Docker, GitHub Actions) and help set our infrastructure playbook.

• Partner directly with the founder to shape product direction and technical strategy at a company-defining level.

Who You Are

• A builder at heart—comfortable owning ideas from sketch to production.

• Thrives in tiny, high-trust teams where autonomy is the default.

• Energized by working at the intersection of AI, product, and infrastructure.

• Equally willing to prototype quickly or sweat the details where it matters.

• Operates at startup speed: you bias toward action, learn fast, and value momentum.

• Motivated by impact—you want your work to shape the DNA of the company, not just features on a roadmap.

Qualifications

• 7+ years of engineering experience spanning back-end and full-stack roles.

• Deep fluency in Typescript/JavaScript and Python.

• Production experience with modern frameworks (NestJS or similar, React/Next.js).

• Strong database skills (SQL + NoSQL), caching strategies, and system design instincts.

• Cloud expertise (GCP preferred, AWS/Azure fine), plus containerization (Docker, Kubernetes) and CI/CD pipelines.

• Hands-on experience building with LLMs: prompt design, orchestration, RAG, and evaluation harnesses.

• Startup-ready: you’re comfortable when you are the process.

Why Join Us

• You’ll be engineer #2, working side-by-side with the founder to lay the technical and cultural foundation.

• Your work will shape every layer of the product and infrastructure.

• High autonomy, broad scope: you’ll touch everything from low-latency pipelines to product strategy.

• Competitive salary with meaningful equity.

• Remote-first, with ~4 hours overlap to US Pacific.

• We’re staying lean—4–5 engineers max over the next year—so every hire is pivotal.

This is a ground-floor role: small team, outsized impact, and meaningful equity upside.