• 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. • Responsible for deeply technical systems (IDV, fraud signal repositories, seller enrichment pipelines, predictive models) that directly influence GMV, seller retention, and buyer trust. • Ensure that Whatnot can confidently scale this influx without compromising marketplace integrity.