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 an experienced infrastructure engineer to help build Stream, a new conversational interface. You will be responsible for developing a highly scalable real-time production service with various steps of ML and data processing. You’ll work closely with other mobile and firmware engineers to deliver the foundations for new human-computer interactions. Responsibilities - Architect a high-uptime, low-maintenance, and reliable distributed inference system - Lead observability and oncall - Achieve very low latency & jitter with attention to P99 performance - Develop a safe rollout to production process in partnership with ML, SW, and mobile engineers - Implement data pipelines for user-facing features and internal tooling Qualifications - Proficient in Python and Javascript - Experience in shipping consumer facing interactive real-time services - 2+ years owning a live production system in a small team, for large N of users - 2+ years working in a big infra teams (Google / Meta / etc) - Technical leadership for building a robust process with the team - Strong ownership on healthy live service FTE Benefits - Health, vision, and dental benefits - Company-sponsored 401(k) - Unlimited PTO and sick time - Early stage equity