Upstream

You'll join as a founding engineer building **a modern email client** for teams, creating a **fast and reliable** cross-platform experience. You'll shape the product and technical direction, and ship production-ready software to users. This role offers high ownership in a well-funded YC startup with a unique product vision.

You'll lead **React Native development** for Upstream, a modern email client built for teams. You'll own the **product vision** from prototype to production, focusing on **blazingly fast and reliable** user experiences. As a founding engineer, you'll shape both the technical direction and company culture.