Software Engineer, Seller Growth

About the role

Whatnot is the largest live shopping platform in North America and Europe to buy, sell, and discover the things you love. As a Software Engineer on the Seller Growth Platform pod, you’ll design and build the systems that sit at the heart of the new seller funnel. Your work will focus on protecting the funnel from fraud and abuse, balancing growth with trust and safety, building platform intelligence, creating scalable infrastructure, and driving long-term seller success.

Responsibilities

• Develop and scale systems for identity verification (IDV), fraud detection, and automated trust/risk reviews that safeguard buyers while minimizing friction for good sellers.
• Ensure that thousands of new sellers joining weekly can sell successfully without degrading the buyer experience, while preventing bad actors from gaining distribution or abusing incentives.
• Power accurate seller identification (e.g., enrichment data, signals, and predictive LTV models) to route sellers to the right onboarding, incentive, and discovery paths.
• Partner with Data Science and Trust teams to design reusable trust and reputation systems, modular fraud prevention frameworks, and experimentation platforms that other pods and teams across Whatnot can leverage.
• Enable better bucketing of sellers by value and risk profile, ensuring that high-potential sellers are accelerated early, while low-quality or fraudulent sellers are contained before they reach scale.

Requirements

• 5+ years of software engineering experience.
• Bachelor’s Degree in Computer Science or related field or equivalent work experience.
• Experience building scalable systems (we primarily use Python, Elixir, JavaScript).
• Ability to work across the stack (backend and frontend).
• Excellent product instincts; you first think about users rather than the best technical solution.
• Proven track record of delivering features; you are known for shipping products and features lightning-fast.
• Ability to take ownership of an ambiguous area and define and then drive impact.
• Ability to flexibly work across multiple workstreams, thriving in a fast-paced environment.
• Knowledge of data and growth systems like notifications.
• Scalability and data pipeline experience with SQL, dbt, etc.

Benefits

• Generous Holiday and Time off Policy.
• Health Insurance options including Medical, Dental, Vision.
• Work From Home Support and home office setup allowance.
• Monthly allowance for cell phone and internet.
• Care benefits and monthly allowance for wellness.
• Annual allowance towards Childcare.
• Lifetime benefit for family planning, such as adoption or fertility expenses.
• Retirement: 401k offering for Traditional and Roth accounts in the US (employer match up to 4% of base salary) and Pension plans internationally.
• Monthly allowance to dogfood the app.
• All Whatnauts are expected to develop a deep understanding of our product and use Whatnot as both a buyer and a seller as part of their job.
• Parental Leave: 16 weeks of paid parental leave + one month gradual return to work (company leave allowances run concurrently with country leave requirements which take precedence).

Team members in this role must live within commuting distance of our New York or San Francisco hub.

Compensation Range: $205K - $290K