Sandbar builds the Stream smart ring and companion app that let users capture and interact with AI-powered voice notes on the go.
About Sandbar Sandbar is an interface company in New York City. We aim to augment individuals so we can each think, act, and move more freely. Our team has built SW, ML, and HW products across Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox. Our first product, Stream, is a self extension—a private voice ring and conversational interface. Stream has been featured in WSJ, Bloomberg, & Wired, and begins shipping in Summer '26. Join us in creating technology that extends human thinking. About We’re looking for a senior iOS product engineer to help build Stream, a new conversational interface. The Stream iOS app touches every aspect of our user experience; including device-cloud connectivity, on-device processing, UIUX, and more. You’ll work closely with design, firmware, and backend engineers to create a technically rigorous experience that ultimately feels simple. Responsibilities - Own iOS product delivery—including architecture (Swift), metrics-driven optimization, testing, and releases - Work closely with backend services (Websocket) and device integrations (BLE) for low-latency, always-available human-computer interactions - Work with product, design, and GTM to ship releases, gather insights, iterate, and improve our experiences for end-users Qualifications - 8+ years building and shipping interactive mobile (iOS) applications - Strong proficiency in Swift and complex interactive app development. - Deep experience in OS-level integrations such as media control or on-device ML - Experience in Python-based servers and the iOS Bluetooth stack are a plus - Strong interdisciplinary communication - Strong ownership, comfort with ambiguity, and technical output - Passion for end-user delight and human-computer interfaces FTE Benefits - Health, vision, and dental benefits - Company-sponsored 401(k) - Unlimited PTO and sick time - Early stage equity