Fullstack Engineer, Buyer Growth

Whatnot•San Francisco, CA

58d•Hybrid

About The Position

Whatnot is the largest live shopping platform in North America and Europe to buy, sell, and discover the things you love. We're re-defining e-commerce by blending community, shopping, and entertainment into a community just for you. As a remote co-located team, we're inspired by innovation and anchored in our values. With hubs in the US, UK, Germany, Ireland, and Poland, we're building the future of online marketplaces -together. From fashion, beauty, and electronics to collectibles like trading cards, comic books, and even live plants, our live auctions have something for everyone. And we're just getting started! As one of the fastest growing marketplaces, we're looking for bold, forward-thinking problem solvers across all functional areas. Check out the latest Whatnot updates on our news and engineering blogs and join us as we enable anyone to turn their passion into a business, and bring people together through commerce. The Buyer Growth team is responsible for driving Whatnot's top-of-funnel growth and first-time buyer success. We focus on acquisition, activation, and early retention, partnering closely with product, data, design, and marketing to build experiences that bring new users into the ecosystem and turn them into loyal customers. In this role, you will Lead and scale critical growth initiatives such as onboarding flows, referral systems, guest browsing, notification systems Design and own end-to-end systems, from backend services to frontend experiences, that impact millions of users. Drive architectural decisions to ensure systems are reliable, scalable, and extensible as we scale rapidly. Work across product, marketing, and data science to identify high-leverage growth opportunities and rapidly iterate on experiments. Instrument, monitor, and improve funnels to drive measurable lifts in new user conversion and retention. Mentor other engineers and contribute to raising the bar for engineering excellence across the team. Team members in this role are required to be within commuting distance of our Los Angeles, San Francisco, Seattle, or New York hubs. You Curious about who thrives at Whatnot? We've found that low ego, a growth mindset, and leaning into action and high impact goes a long way here.

Requirements

5+ years of full-time, generalist software engineering experience in high growth tech companies, and a track record of delivering impactful, user-facing products autonomously.
Bachelor's Degree in Computer Science or related field or equivalent work experience
A strong foundation in backend and frontend development. You're comfortable moving between layers and integrating systems end-to-end.
Excellent product instincts. You first think about users rather than the best technical solution.
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

Nice To Haves

Experience building E-commerce or Social products
Expertise in mobile and/or full stack web development frameworks
Familiarity with growth engineering strategies, A/B testing, and analytics

Responsibilities

Lead and scale critical growth initiatives such as onboarding flows, referral systems, guest browsing, notification systems
Design and own end-to-end systems, from backend services to frontend experiences, that impact millions of users. Drive architectural decisions to ensure systems are reliable, scalable, and extensible as we scale rapidly.
Work across product, marketing, and data science to identify high-leverage growth opportunities and rapidly iterate on experiments.
Instrument, monitor, and improve funnels to drive measurable lifts in new user conversion and retention.
Mentor other engineers and contribute to raising the bar for engineering excellence across the team.

Benefits

Flexible Time off Policy and Company-wide Holidays (including a spring and winter break)
Health Insurance options including Medical, Dental, Vision
Work From Home Support
Home office setup allowance
Monthly allowance for cell phone and internet
Care benefits
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. We're passionate about building the best user experience, and all employees are expected to use Whatnot as both a buyer and a seller as part of their job (our dogfooding budget makes this fun and easy!).
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.