CareerPlan

シニアモバイルエンジニア / Senior Software Engineer, Mobile Foundation

Shibuya, Tokyo, JapanFull-time2026-10-29 → 2026-11-10
Visa sponsorship offered

Core

Rebuilding the technical foundation for iOS and Android apps to enable faster, more reliable releases and bold product innovation.

Role type

Senior Mobile Engineer (Android Foundation)

Builds

Scalable, reusable mobile build and release infrastructure, shared tools, and modernized architecture for the SmartNews mobile ecosystem.

Domain

Mobile application development (iOS/Android) and DevOps

Required skills

Kotlin, Android development, modular architecture, dependency injection, concurrency, automated testing, performance profiling, CI/CD pipelines, Fastlane, Gradle, release workflows, cross-functional collaboration, technical mentoring

Preferred skills

Kotlin Multiplatform, Compose Multiplatform, Swift, iOS architecture, self-hosted CI infrastructure, build caching, observability, incident response

Technologies

Kotlin, Swift, Gradle, Fastlane, CI/CD, Android, iOS, macOS, Linux

Responsibilities

Modernize a large legacy codebase through modular architecture and multiplatform technologies; improve app reliability and performance by resolving production issues and optimizing startup time; own mobile build and release infrastructure from CI/CD to signing and provisioning; accelerate developer productivity through shared tools and AI-assisted workflows; shape technical solutions and raise engineering standards via design reviews and mentoring; support mobile on-call rotation for incident triage and resolution

Seniority

Senior, hands-on IC with architectural leadership