Android Engineer, Whatnot

• 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, but here are a few criteria we're looking for in this role:
• As our next Senior Android Engineer you should have 5+ years of experience building and shipping high-quality Android applications, plus:
• Bachelor’s degree in Computer Science, a related field, or equivalent work experience
• Android expertise in creating fluid, responsive user interfaces. Strong knowledge of Kotlin and Jetpack Compose. Adept at reactive programming with Kotlin Coroutines and Flows. Fluent in MVI or MVVM development
• Care deeply about product quality and performance, creating polished experiences that balance usability and trust
• Thrive in cross-functional environments, partnering effectively with product, design, and backend peers
• Are comfortable using data and experimentation (SQL, Snowflake, A/B testing) to guide decisions
• Communicate clearly and drive alignment across teams in ambiguous, fast-changing environments
• Have a growth mindset, taking ownership from concept to launch while mentoring others along the way

Desirable

• The Seller Growth Engineering team is responsible for growing sellers on Whatnot — enabling them to turn their hobbies into businesses. Within Seller Growth, the Platform pod ensures that this growth is sustainable, trustworthy, and scalable
• As a Senior Android Engineer on the Seller Growth Platform pod, you’ll design and build the mobile experiences and systems that sit at the heart of the new seller funnel — combining growth, trust, and scalability. Your work will directly shape how thousands of new sellers join and succeed on Whatnot every week
• Develop high-quality Android features using Kotlin and Jetpack Compose that enhance the seller onboarding, verification, and incentive journeys
• Collaborate cross-functionally with product, design, and backend teams to define goals, scope, and technical trade-offs
• Partner with data science to design and interpret experiments that measure seller success and improve funnel efficiency
• Contribute to the evolution of shared mobile infrastructure and best practices across Whatnot’s engineering teams
• Uphold engineering excellence through code reviews, documentation, and thoughtful discussions that raise the bar
• This pod works at the intersection of growth, trust, and platform-ization. You’ll be responsible for deeply technical systems (IDV, fraud signal repositories, seller enrichment pipelines, predictive models) that directly influence GMV, seller retention, and buyer trust. The pace is fast: every week, thousands of sellers apply to sell, and your work ensures that Whatnot can confidently scale this influx without compromising marketplace integrity