Senior Fullstack Software Engineer (Python/TypeScript)

Burns Sheehan; Greater London; On-site; GBP 72,000 - 120,000; Full time

Job summary

Burns Sheehan Ltd is partnering with a scale-up AI platform to hire a Senior Full Stack Engineer (Frontend-leaning) to own frontend architecture and UI delivery. You will work on AI-powered learning dashboards and critical product features, shaping user experiences for global customers.

In this role you will split ~70% frontend and ~30% backend, collaborating with Product, Design and the CTO to translate complex AI workflows into intuitive interfaces.

Qualifications

• Strong proficiency in modern JavaScript/TypeScript and SPA frameworks.
• Comfortable linking frontend features to backend APIs.
• Collaborate with Product, Design and leadership to shape UI and UX.

Responsibilities

• Lead frontend engineering (~70% frontend / 30% backend) delivering responsive, accessible UI for AI-powered flows and dashboards.
• Design and implement full-stack features end-to-end using Python (FastAPI).
• Collaborate with Product, Design and the CTO to translate complex AI workflows into intuitive user experiences.
• Set frontend performance standards, component reuse, and modern UI patterns across the codebase.

Skills

Frontend Excellence

TypeScript

Vue 3

React

CSS/Tailwind

API Integration

Python (FastAPI)

UI/UX Collaboration

Job description

Senior Full Stack Engineer (Frontend-Leaning) | Scale-Up AI Platform

Salary: Up to £120,000 per annum + equity

Location: Hybrid - 1 day a week onsite in London

Tech Stack: Vue 3 / React, TypeScript, Python, PostgreSQL, Azure

We're partnering with a high-growth AI adoption and skills platform, who are developing a production-grade enterprise SaaS application at scale. Their platform delivers personalised, AI-powered learning and governance experiences that help major global organisations rapidly harness AI safely.

Having recently closed a successful funding round (backed by top-tier VCs) and already scaling past £1M+ ARR with over 15,000 users, they are embarking on an exciting new phase of expansion into the US. They are looking for a skilled Frontend-Leaning Senior Full Stack Engineer to join their elite 9-person engineering team, taking point on user experience, UI architecture, and high-impact feature delivery.

Why this role is exciting:

• Frontend Ownership: Drive the frontend architecture, design system, and UI performance while maintaining the capability to work full-stack across the system.
• AI-Native Culture: They practice what they preach. The team is genuinely ahead of the curve, writing the majority of their code via Codex and pairing human PRs with AI reviews to supercharge velocity.
• Direct Impact: Your output will directly shape the commercial and technical trajectory of the company as they expand internationally.
• High Talent Density: Join a small, high-calibre engineering team that values rapid shipping cycles, clean UX, and pragmatic problem-solving over bureaucracy.

What you will do as a Senior Full Stack Engineer:

• Lead the frontend engineering efforts (~70% frontend / 30% backend split), crafting highly responsive, accessible, and intuitive visual interfaces for AI-powered learning flows and platform dashboards.
• Design and implement full-stack features end-to-end, connecting dynamic UI components to backend APIs and services using Python (FastAPI).
• Collaborate directly with Product, Design, and the CTO to translate complex AI workflows into smooth, slick end-user experiences.
• Set the standard for frontend performance, component reuse, state management, and modern UI patterns across the codebase.

What they're looking for in a Senior Full Stack Engineer:

• Frontend Excellence: Strong, hands-on experience mastering modern JavaScript/TypeScript, CSS/Tailwind, and modern SPA frameworks (Vue 3 or React).
• Full-Stack Capability: Comfortable navigating and writing backend code. While they use Python (FastAPI) on the backend, they are flexible on backend language backgrounds as long as you have solid API integration experience.
• Product & Design Empathy: You care deeply about the user experience. You don't just build to a ticket-you work closely with design to refine UI details, edge cases, and interactions.

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