Staff Backend Engineer (£140k-£160k+ + Equity) at a16z-backed Series B marketplace

Job Title

Staff Backend Engineer

Salary

£140k-£160k+ + Equity

Company Description

a16z and YC-backed Series B marketplace reinventing wholesale sustainable fashion

Job Description

Join a high-growth marketplace moving millions of items across 70 countries. As a Staff Engineer in the Growth squad, you will architect business-critical systems for payments, checkout, and global order management. You’ll solve complex logistics and technical challenges at scale, building the backend foundation for a global circular fashion economy.

Location

London, UK

Why this role is remarkable

• Rare opportunity to join an a16z-backed Series B scaleup operating at the intersection of AI-powered logistics and sustainable global commerce.
• High-impact technical ownership: architect systems handling 500K+ unique items monthly, utilizing AI-driven grading and inventory systems spanning three continents.
• Direct collaboration with an elite engineering culture led by a CTO from Google and Postmates, emphasizing architectural depth and product-focused engineering.

What You Will Do

• Lead the architectural direction for the Growth squad, owning the end-to-end ecommerce journey from discovery through to complex global checkout flows.
• Design and scale robust backend systems for payments, credit facilities, and seller tools capable of handling millions of unique inventory items.
• Act as a technical force multiplier, leveraging AI to optimize supply chain tooling and mentoring senior engineers in a high-performance environment.

The ideal candidate

• Extensive experience as a Staff or Lead Engineer at tier-1 consumer scaleups like Monzo, Deliveroo, Depop, or similar high-growth B2C environments.
• Proven track record of building and scaling complex backend systems including payments, checkout, or high-throughput data pipelines using Node.js/TypeScript.
• Product-obsessed mindset with the ability to articulate complex architectural trade-offs and connect deep engineering decisions to tangible business outcomes.

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