Overview
Full-Stack Growth Builder at Fleek Jobs in London, England, United Kingdom at Jack & Jill
Title: Full-Stack Growth Builder at Fleek
Company: Jack & Jill
Location: London, England, United Kingdom
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
Full-Stack Growth Builder
Salary
Not Disclosed
Company Description
Fleek is a ~$50M Series B B2B marketplace backed by a16z and Y Combinator that is digitizing the global secondhand fashion supply chain.
Job Description
Join Fleek to reinvent customer lifecycle marketing using an AI-first approach. As a Full-Stack Growth Builder, you will architect adaptive CRM systems and build stickiness-driving tools for resellers. Reporting to the VP of Growth, you will transform static marketing journeys into dynamic, automated engines that scale secondhand fashion as the world's first choice for commerce.
Location
London, UK
Why this role is remarkable
- Own the entire lifecycle strategy end-to-end for a high-growth marketplace, moving beyond campaign management to architecting intelligent, automated growth systems.
- Join a talent-dense, Series B company backed by top-tier investors like a16z and Y Combinator, operating in a market projected to reach $350B.
- Work directly under a VP of Growth with a proven track record of scaling platforms like Deliveroo from millions to hundreds of millions in revenue.
What You Will Do
- Design and deploy smart, adaptive CRM systems that utilize real-time signals and AI to determine optimal messaging, timing, and channel selection for users.
- Build and maintain rigorous experimentation frameworks, using causal inference and lift testing to quantify the true incremental impact of lifecycle initiatives.
- Develop end-to-end tooling for resellers, such as cross-listing automation, to increase platform stickiness and help customers scale their own businesses.
The ideal candidate
- A deeply technical builder who treats AI tools like Claude Code or Cursor as their default toolkit to ship production-quality code and systems rapidly.
- Strong analytical fluency in SQL and experience working with large, messy datasets to drive algorithmic decision-making and frequent, high-velocity experimentation.
- Proven ability to balance product intuition with technical execution, building systems that learn and evolve rather than relying on static, rules-based marketing journeys.
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.
How does this work?
- Jack's an AI agent for job searching and career coaching. He works for you.
- Jill is the AI recruiter working for the company. She recruits from Jack's network.
- If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
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.
