Staff Fullstack Engineer - Realtime And Personalization

Tokyodev is a software development firm that builds web‑based platforms and services. The Staff Fullstack Engineer role focuses on creating and maintaining real‑time and personalization features across the product stack. Day‑to‑day work will involve designing and implementing APIs, data pipelines, and front‑end components that deliver live updates and tailored user experiences. The engineer will use technologies such as JavaScript/TypeScript, Node.js or similar back‑end frameworks, and modern front‑end libraries like React, while integrating real‑time communication methods (e.g., WebSockets, server‑sent events) and personalization logic based on user data. Responsibilities include writing scalable code, optimizing performance, collaborating with product and design teams, reviewing code, and mentoring junior developers. The position suits a senior‑level developer with several years of full‑stack experience, strong proficiency in both front‑end and back‑end development, familiarity with real‑time architectures, and an interest in building data‑driven, user‑centric features.