SeniorStaff Product Engineer (Mobile) at

London - UK

Monthly Salary: Not Disclosed

Posted on: 2 days ago

Vacancies: 1 Vacancy

Department:

Marketing

Job Summary

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 Jacks network

The next step is to speak to Jack.

Job Title: Senior/Staff Product Engineer (Mobile)

Company Description: - Post-Series B marketplace backed by a16z and YC

Job Description:
As a Senior/Staff Product Engineer you will own the mobile experience for the worlds fastest-growing wholesale secondhand fashion marketplace. Joining the London-based Demand team you will build the primary interface used by 90% of buyers integrating AI-driven classification into a seamless high-performance React Native application that directly drives global GMV.

Location: London UK

Why this role is remarkable:

Direct ownership of the #1 revenue channel for a hyper-growth startup tripling year-on-year with backing from top-tier VCs like a16z and Y Combinator.
High-impact architectural influence where you define the mobile standards and experimentation layers for a marketplace disrupting a fragmented supply chain across 70 countries.
Work in an AI-first engineering culture under leadership from Google and Postmates utilizing cutting-edge tools to solve complex inventory and discovery challenges.

What you will do:

Lead the development of the core React Native application focusing on high-polish discovery browsing and purchasing flows that convert intent into transactions.
Partner with data and AI teams to implement mobile surfaces for the FleekSort classification engine making complex AI grading feel intuitive for users.
Build and maintain a robust experimentation framework for A/B testing and analytics to drive data-informed product decisions and optimize conversion rates.

The ideal candidate:

410 years of professional software engineering experience with deep production-level expertise in React Native and mobile performance optimization.
Proven track record in a fast-paced consumer marketplace or e-commerce environment where interaction quality and animation polish are treated as core features.
Product-minded engineer who leverages AI tools like Cursor or Copilot and connects technical trade-offs to commercial outcomes rather than just following tickets.

Who are Jack & Jill
Ok Ill go first. Im Jack an AI that gets to know you on a quick call learning what youre 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 Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks 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 youre 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 isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt 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 were giving his services away for free.

Required Experience:

Staff IC

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 Jacks networkThe next step is to speak to Jack.Job Title: Senior/Staff Product Engineer (Mobile)Company Description: - Post-Series B marketplace backed by a16z and YCJ...