iOS Engineer

This role covers design, development, testing, and maintenance of the ZEN Study iOS app, an online learning platform run by Dwango's education business alongside the N/S/R high schools and the upcoming ZEN University. Day-to-day work includes building new features, writing and maintaining internal and external documentation, team development and code review via GitHub, investigating crashes and analyzing access logs, handling iOS version updates, and app release work. The stack includes Swift, Ruby, Bash, and SQL, with SwiftUI, UIKit, RxSwift, Swift Concurrency, AVFoundation, WebKit, and swift-testing on an MVVM architecture managed with SwiftPM; CI/CD runs on Bitrise and DeployGate, with Firebase Crashlytics, Google Analytics, and Kibana for analytics, Figma for design, and Slack/GitHub/JIRA/Confluence for collaboration. Requirements: 3+ years of professional Swift iOS development experience, hands-on experience with asynchronous processing via RxSwift or Swift Concurrency, UIKit, and SwiftUI, Git-based team development experience, and GitHub code review experience. Preferred: web development, database, and Unix knowledge, experience publishing native smartphone apps to app stores, and performance/maintainability-focused design. Full-time under a discretionary labor system (deemed 8-hour day); the team works remotely via Slack and GitHub, though office work is possible if preferred. Salary is negotiable based on prior experience, with raises and bonuses twice yearly (June and December). Location: Ginza, Chuo-ku, Tokyo.