The Challenge
Whatnot is North America's largest livestream shopping platform, scaling sellers across hundreds of categories. You'll build the trust and growth systems that protect the funnel from fraud while enabling thousands of new sellers weekly to turn passion into real businesses.
Your Mission
Ship identity verification (IDV) and fraud detection systems that reduce seller friction by 20% while maintaining trust standards
Build and deploy seller onboarding experience improvements across React frontend and backend APIs
Establish baseline metrics for seller funnel health and implement A/B testing framework for experimentation
Create initial seller enrichment pipeline to route users to appropriate onboarding and incentive paths
Scale fraud detection and automated trust review systems to handle 10x seller application volume without manual review bottlenecks
Design and execute 6+ A/B tests on onboarding, education, and incentive flows with measurable GMV and retention impact
Build reusable data pipelines and growth infrastructure (notifications, lifecycle triggers) for other product pods
Reduce seller churn in first 30 days by 15% through targeted seller enrichment signals and personalized onboarding paths
KPIs You'll Own
Seller Application Volume & Approval Rate
Track weekly new seller applications and approval rate to measure funnel health and fraud system effectiveness.
GMV from New Sellers
Gross merchandise value generated by cohorts of newly onboarded sellers within first 30/60/90 days.
Seller Retention (30/60/90 day)
Percentage of activated sellers who list or transact within retention windows; direct signal of onboarding quality.
Fraud Detection Precision & Recall
True positive rate of fraud systems and false positive rate to balance trust with seller experience friction.
A/B Test Velocity & Statistical Power
Number of concurrent tests running and speed to statistical significance for onboarding/incentive variants.
Tools & Stack
Your Team
Your Manager
Not specified; likely Seller Growth Pod Lead or Engineering Manager
Current Team
Cross-functional Seller Growth pod (product, data, design); remote co-located team with hubs across US, UK, Ireland, Poland, Germany, Australia
New role
The Package
Salary
$160K-$200K base
Remote
On-site in New York, NY
Benefits & Perks
Company Intelligence
Whatnot is the largest livestream shopping platform in North America and Europe, enabling sellers to build real businesses across hundreds of categories (trading cards, fashion, electronics, plants). The company is moving live commerce at scale that's never been done in the West, backed by a team culture grounded in low ego, growth mindset, and high-impact drive.
Customers
Sellers and buyers across trading cards, fashion, electronics, live plants, and other categories
Culture
Low ego, growth mindset, high-impact drive; move fast, stay close to users, focus on work that drives most impact
Is This Role For You?
- You've shipped full-stack features in 3+ years of generalist software development at high-growth startups
- You write clean Python or JavaScript and understand both backend systems (fraud, identity, data pipelines) and modern React frontends
- You're obsessed with user impact and product instincts-you think about sellers first, not just engineering elegance
- You thrive in fast-paced, ambiguous environments where you're building marketplace infrastructure at scale with unclear playbooks
- You need remote flexibility-this role requires on-site presence in NYC
- You're specialized in backend OR frontend only; this role needs genuine fullstack capability across the stack
- You're uncomfortable with the pace or ambiguity of a rapidly scaling marketplace
Interview Process
Not specified
Typical process likely includes technical screening, system design, behavioral, and product instinct conversations
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About Growth Marketing roles
Growth marketers drive user acquisition, activation, and retention through data-driven experimentation. They sit at the intersection of product, data, and marketing — running A/B tests, building funnels, and scaling what works.