Role owns greenfield build of growth and lifecycle infrastructure across web, desktop, plugin, and mobile for music/audio products. Responsibilities include selecting the martech stack (CDP, analytics, messaging, warehouse, reverse-ETL), designing event taxonomy and identity resolution, implementing in-app PLG mechanics and paywalls, instrumentation and experimentation, and owning growth dashboards. Requires 6+ years of end-to-end ownership of product or growth infrastructure and hands-on experience with TypeScript, Node.js, Python, and SQL.