Principal Full Stack Engineer

OVERVIEW As a Principal Full Stack Engineer, you’ll lead a team to build-out Phia’s core product and platform from the ground up. You’ll own engineering execution across frontend, backend, and infrastructure, setting the technical direction while scaling teams that move fast and ship reliably. This is a hands-on leadership role for someone who thrives in ambiguity, partners tightly with Product and Design, and knows how to balance speed, quality, and long-term architecture. You’ll define how engineering works at Phia as we grow from zero to one and beyond. ABOUT PHIA Phia has raised $35M from Notable Capital, Khosla Ventures, and Kleiner Perkins to build the AI alignment layer for commerce. In under a year, Phia’s consumer shopping agent has surpassed one million users and partnered with 6,200+ retail brands, representing billions in annual gross merchandise volume. Each month, Phia drives millions of dollars in sales for brands and has achieved 11× revenue growth since launch. In