Lead Frontend Product Engineer

Role Overview As a Lead Frontend Engineer, you will own the end-to-end direction of our frontend applications used across convenience-store robotics operations. You will collaborate closely with business teams to clarify requirements, work with designers on implementation-ready specifications, and lead the prototyping → implementation → release workflow. You will guide two existing frontend engineers as a player-coach while continuing to contribute hands-on. You will work in an English-speaking engineering team while delivering a product primarily for Japanese end users. While Japanese managers and business stakeholders can communicate in English, a significant portion of the input information and business context is in Japanese.   Team & Platform Context We are planning to migrate our legacy Unity-based 2D application to a modern WebView-based architecture in the future. Currently, we are in the initial phase of building a simple web application using TypeScript and React, which integrates with a newly developed .NET REST API backend. While our broader ecosystem relies on C#, gRPC, and Azure, this role focuses on establishing this new web-standard client layer from the ground up. Historically, engineers touched all components; as we scale, we are specializing roles. You will lead the frontend domain, bridging the gap between complex robotics data and intuitive user experiences, while laying the groundwork for a unified multi-platform client application.   The Challenge: Soft