Senior Android Engineer, Sole Proprietor Development Department, Tokyo

Tokyodev is a software development firm based in Tokyo that builds digital products, with a focus on mobile applications. The Senior Android Engineer role is positioned within its Sole Proprietor Development Department, indicating a small, possibly autonomous team responsible for end‑to‑end Android development. Day‑to‑day duties are expected to include designing and implementing new features for Android apps, maintaining existing codebases, optimizing performance, and ensuring compatibility across devices. The engineer will likely lead technical decisions, conduct code reviews, mentor junior developers, and collaborate with product managers and designers to translate requirements into functional software. The position demands strong proficiency in Kotlin and Java, deep knowledge of the Android SDK, architecture patterns such as MVVM or Clean Architecture, and experience with tools like Git, CI/CD pipelines, and testing frameworks. Candidates should have several years of professional Android development experience, a track record of delivering production‑grade apps, and the ability to work independently while contributing to a small, focused development unit.