Senior Growth Analyst at Joinfleek.com

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Senior Growth Analyst

Company Description: Joinfleek.com - a16z-backed B2B marketplace digitising the secondhand fashion supply chain with AI.

Job Description:
You will own the analytical engine for a marketplace tripling annually, sitting at the intersection of marketing and strategy. By building attribution frameworks from scratch, you'll optimize spend across influencer, paid, and organic channels. This is a high-impact role where your insights directly determine how millions in capital are deployed to scale global circular commerce.

Location: London, UK

Why this role is remarkable:

• Immediate financial impact: a junior analyst recently identified £100k in monthly savings through basic attribution-you will have the seniority and tools to unlock significantly more.
• Massive scale and backing: Joinfleek.com has raised ~$50M from top-tier VCs like a16z and Y Combinator, saving over 9 million items from landfills since 2022.
• Unique data challenges: Unlike standard SaaS, you will model complex marketplace dynamics where every item is unique and inventory is graded by proprietary AI models.

What you will do:

• Design and operate sophisticated attribution models (MMM, MTA, and incrementality) to evaluate performance across influencer, affiliate, and paid social channels.
• Analyze full-funnel metrics including CAC, LTV, and payback periods to provide actionable recommendations that guide daily spend and long-term growth strategy.
• Partner with engineering to build robust data foundations, ensuring clean tracking via UTMs, pixels, and events to power your analytical frameworks.

The ideal candidate:

• 4-7+ years of growth or marketing analytics experience, specifically owning attribution and channel performance at a fast-scaling consumer or marketplace company.
• Expert-level SQL skills with the ability to independently pull and transform large datasets, ideally complemented by Python or R for statistical modeling.
• Proven track record of translating complex data into clear narratives that drive executive-level decisions, focusing on business outcomes rather than just reporting.

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.