Designed and built core systems for Peloton's unreleased next-gen gamified fitness products — networking, avatar customization, dynamic music, enemy logic, and pathing, plus extensive UI. Established foundational systems supporting multiple parallel prototypes, made architecture decisions on system boundaries and extensibility, and defined cross-functional workflows and documentation adopted across engineering, design, and art. Took 1st place in the 2024 company-wide hackathon as designer, producer, and engineer.