Lead Engineer for Health-Tech Startup

Job Description

Bifrost Studios is hiring a Lead Engineer on behalf of Feno Feno is building the world’s first AI-powered smart toothbrush – a 20-second oral care system that uses computer vision to deliver comprehensive cleaning and real-time health insights. We’re not just making a better toothbrush; we’re unlocking the connection between oral health and systemic health, including heart disease, diabetes, and cognitive decline. We’re a small, intense team scaling toward >48,000 units in 2026. Every system you build will directly impact how people take care of their health. Tasks The Role We’re looking for a Lead Engineer to own engineering execution across our entire software stack: iOS app, backend, cloud infrastructure, frontend, and internal tools. You’ll lead a small team (currently 2 engineers), write production code yourself, and build the systems that power every Feno device in the field. This is a player-coach role. You’ll spend about: 40% of your time leading (1:1s, sprint planning, unblocking, cross-functional coordination) 40% coding 20% on technical strategy You report to the CTO and work closely with our Head of AI. The right person will eventually grow this team and could be on a path to CTO. What You’ll Own Engineering team management – hiring, 1:1s, performance, unblocking Backend systems and API development (Python) Cloud infrastructure (AWS) – deployment, monitoring, incident response Frontend development (React/TypeScript), including using AI coding tools to cover gaps Internal automation and tooling Coordination with firmware engineers and Head of AI on cross-functional work What Success Looks Like At 60 Days The CTO and Head of AI have 100% confidence that software execution is handled. Code ships, incidents get resolved, and the engineering team operates without constant oversight. At 12