Dex
Staff Software Engineer (up to £170k)
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The role
The fashion industry produces an immense volume of garments each year. A significant portion ends up in landfill, not because of a lack of demand, but due to an inefficient, offline supply chain for secondhand goods. We're changing that. Our mission is to make secondhand the first choice, building the AI-powered infrastructure for global secondhand commerce. We've already saved millions of items from landfill, are growing rapidly, and are backed by leading VCs after a recent Series B.
This isn't a typical mobile engineering role. As a Staff Mobile Engineer, you'll join a small, senior Demand team in London, owning the entire mobile buyer experience for a marketplace unlike anything before it. This means building the product that converts intent into transactions, integrating proprietary AI models for item grading and discovery. It's not a feature factory; you'll shape product decisions, challenge design trade-offs, and define the mobile architecture for a hyper-growth company.
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The work
- Own the end-to-end mobile buyer experience, building and scaling the core marketplace app (browsing, discovery, purchasing) that directly drives GMV.
- Integrate proprietary AI classification models into the mobile product, translating complex grading and pricing into intuitive, fast, and trustworthy UX.
- Ship new features with craft and velocity, maintaining release stability, reducing crash rates, and optimising performance across devices.
- Work embedded with Product and Design, shaping product direction by challenging assumptions and bringing technical trade-offs into early conversations.
- Build and instrument the mobile app for A/B testing and analytics, enabling data-driven product decisions for the Demand team.
What You Bring
- 4-8+ years of professional software engineering experience, having shipped production mobile apps that handle real users and transactions.
- Deep production expertise with React Native, including comfort navigating the boundary between React Native and native platform code.
- A strong product engineering mindset: you connect UI decisions to conversion outcomes and articulate the business problem your code solves.
- Experience building consumer or marketplace products at scale, with a keen eye for UI craft and performance.
- This role is based in London, requiring 3-4 days in-office (full-time for your first six months).
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Why apply through Dex
This is a rare Staff Mobile role at a rapidly scaling company, often oversubscribed and hard to find. Apply through Dex to cut through the noise: get properly briefed on the role and company, skip cold-applying, and get matched to other high-growth opportunities like this one.
If you're interested, sign up to Dex to apply - https://jobs.meetdex.ai/jobs/2ea7cb1f-1c37-4fcc-9d42-d0bfd421a58b
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