Founding Full Stack Engineer - Consumer AI | Stealth Mode

Burns Sheehan; City Of London; Hybrid; GBP 100,000 - 120,000; Full time

Job summary

A stealth-mode AI start-up is seeking a Founding Full Stack Engineer to design and implement their alpha AI platform. Candidates should have a strong background in both frontend and backend development, be customer-focused, and have experience with modern AI tools. This role offers a competitive salary, generous stock options, and flexibility in work environment with 2-3 days in the office.

Benefits

Generous stock options

Flexible working hours

Opportunity to work in AI

Qualifications

• Strong experience building polished frontend and scalable backend systems.
• A from 0 to 1 mindset, evidenced by launching projects from scratch.
• Comfort with modern AI tools and platforms.

Responsibilities

• Design and build the alpha version of the AI-powered platform.
• Create fast, customer-validated features for frontend and backend.
• Collaborate with cofounders in a high-trust team.

Skills

Frontend development

Backend development

Experience with AI tools

Customer-centric design

Tools

React Native

.NET Core

Azure

TypeScript

Python

Job description

Overview

Founding Full Stack Engineer - Consumer AI (Stealth Mode)

London - 2-3 days a week in the office

Up to £120,000 plus generous stock options

.Net Core | Azure | Typescript | React Native | Python

What you'll do as a Founding Full Stack Engineer

• Design and build the alpha version of their AI-powered platform from the ground up.
• Design, prototype and ship fast, customer-validated features across frontend and backend.
• Craft seamless, mobile-first experiences that feel intuitive, fast and personal.
• Experiment with GenAI tooling to supercharge your workflow and product capabilities.
• Collaborate closely with the cofounders in a small, high-trust, mission-driven team.

What theyre looking for in a Founding Full Stack Engineer

• Strong experience building polished frontend and scalable backend systems.
• A 0rom 1 mindset: You\'ve launched things from scratch, either at startups or on your own and enjoy fast iteration cycles, direct user feedback, and high ownership.
• Comfort using modern AI tools and platforms in your workflow.
• A customer-obsessed, fast-learning engineer who cares about real-world impact.

Tech Stack

Frontend: React Native, Expo, TypeScript, Redux

Backend: Azure, .NET Core, Docker, C#, SignalR

They are pragmatic about using the right tool for the job and while the backend relies heavily on the Microsoft stack they actively consider other languages like Python for data-heavy tasks, Go for microservices or Rust where performance is key. They are constantly evolving their GenAI toolkit and are currently using Cursor, CLINE, Windsurf.

How to apply

This is a fantastic opportunity for a Founding Full Stack Engineer to join a well-funded AI start-up. Please reply with your CV or call Simon for a chat.

Company

Burns Sheehan Ltd will consider applications based only on skills and ability and will not discriminate on any grounds.