Senior Full Stack Engineer (Backend-leaning) - High-Growth eCommerce Platform London / Hybrid (1 day per week) · c £80,000 + Share Options · VC-backed Series A Startup

This company is unable to offer visa sponsorship at this time

Shape the Architecture of a High-Growth eCommerce Platform We’re working with a VC-backed, Series A startup in the luxury eCommerce space that is scaling fast and working with some of the most recognisable fashion brands globally.

They’re looking for a Senior Full Stack Engineer (backend-leaning) to take ownership of architecture, data flows, and complex integrations powering a platform used by millions. This isn’t about tweaking themes, it’s about designing and scaling systems at the core of a rapidly growing business.

The Opportunity Design and scale backend systems powering payments, returns, personalisation, and more. Lead API-first development , data modelling, and performance optimisation. Build reliable systems in TypeScript , working across the stack with React on the frontend. Own deep integrations with Shopify APIs and third-party services (not just theme edits). Collaborate closely with product and design in a lean, high-impact team. Embrace automation and AI tooling to accelerate delivery and maintain quality.

Tech Stack Languages: TypeScript (core), Python/Ruby (data flows) Frontend: React (preferred), Node.js welcome Infrastructure: AWS Databases: RDBMS (essential), Neo4j (nice-to-have) Integrations: Shopify APIs, payment gateways, fraud tools

You’ll Thrive Here If You... Have strong backend engineering fundamentals (schema design, query optimisation, scalable architectures). Have hands-on experience scaling systems in startups or scale-ups. Enjoy owning architecture end-to-end in small, fast-moving teams. Are excited by working close to the product and shipping meaningful features quickly. Bonus: experience with eCommerce APIs, Shopify, payment gateways, or growth tooling.

Why This Role Real architectural ownership in a lean engineering team. Build systems that reach millions of users. Fast decision-making, direct impact, and modern engineering culture. c£80,000 + share options , hybrid London, 1 day/week in office. Series A stage — ideal for engineers who want to shape tech foundations pre-scale.

Interview Process 30-min culture & tech fit conversation 60–90 min technical scenario interview (no whiteboarding) Offer

Ideal for senior full stack or backend engineers with TypeScript/React/AWS experience who want to shape architecture at a growing, product-led company.