Senior Backend Engineer

OVERVIEW As a Senior Backend Engineer, you’ll design, build, and scale core backend systems that power high-traffic consumer products and internal platforms. You’ll own foundational services and APIs, work on high-throughput distributed systems, and partner closely with product, ML, and engineering teams to deliver reliable, low-latency experiences at scale. ABOUT PHIA Phia has raised $43M 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 an era where AI vertical agents are reshaping every industry, commerce is on the verge of a complete transformation. Phia is reinventing shopping from a fragmented, impersonal experience into one that