This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network The next step is to speak to Jack. Job Title: Staff Backend Engineer Salary: £140k-£160k Equity Company Description: Fleek - VC-backed marketplace platform transforming the global B2C supply chain. Job Description: As a Staff Backend Engineer at Fleek, you will lead the technical architecture for the Growth squad, overseeing critical ecommerce systems including payments, checkout, and complex order management. Reporting directly to the CTO, you'll build high-traffic product systems that scale from 500K to millions of unique, AI-graded inventory items across three continents. Location: London, UK Why this role is remarkable: Join a high-velocity engineering culture led by CTO Sanket Agarwal (ex-Google, Postmates) in the heart of Shoreditch. Tackle massive technical complexity where every single inventory item is unique and graded by proprietary AI-sorting technology. Influence the direction of a scaling startup with genuine architectural ownership and a mission-driven approach to global fashion supply chains. What you will do: Design and architect robust backend systems for payments, credit, and seller tools to support rapid consumer growth. Partner with the Growth squad to connect deep engineering decisions directly to buyer and seller business outcomes. Mentor senior engineers while serving as a force multiplier by integrating AI tools into the development workflow. The ideal candidate: Proven track record at tier-1 consumer engineering cultures such as Monzo, Deliveroo, Skyscanner, or Wise. Extensive experience building and scaling deep backend systems like checkout, data pipelines, or order management at high traffic. Product-obsessed mindset with the ability to articulate complex technical trade-offs to both engineering and business stakeholders. Who are Jack & Jill? Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support. And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate. Next steps Step 1. Visit our website. Step 2. Click 'Talk to Jack'. Step 3. Talk to Jack so he can understand your experience and ambitions. Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role. Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction. Step 6. If not, Jack will find you excellent alternatives. All for free. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.