Kenji Tanaka
Mobile Developer — iOS & Cross-Platform
Remote (US) · kenjitanaka.dev · github.com/kenjitanaka · linkedin.com/in/kenjitanaka
Summary
Mobile developer with 5 years shipping to the App Store and Play Store. Shipped features into a 4.7-star, 1.2M-MAU iOS app at 99.9% crash-free, cut Android cold start from 2.4s to 0.9s, and led a React Native module covering both platforms from one codebase. Strong in Swift, SwiftUI, and Kotlin.
Skills
- iOSSwift · SwiftUI · Objective-C · Xcode
- AndroidKotlin · Jetpack Compose · Android Studio
- Cross-platformReact Native · Flutter
- Qualitycrash-free rate · cold start · Fastlane (CI/CD) · in-app purchase
Experience
Mobile Developer — Lumen Apps
2021 — Present
Remote
- Shipped 6 SwiftUI features into a 4.7-star iOS app (1.2M MAU); held crash-free rate at 99.9% across rollouts.
- Cut Android cold-start time from 2.4s to 0.9s by lazy-initializing analytics SDKs and trimming the dependency graph; first-session bounce dropped 11%.
- Owned a React Native module shipped on iOS + Android from one codebase, covering 80% of the user base with a 2-engineer team.
- Set up Fastlane CI/CD with staged Play Console rollouts, cutting release effort and catching two regressions pre-GA.
iOS Developer — Tidal Software
2019 — 2021
San Diego, CA
- Built the in-app purchase flow for a subscription app, lifting trial-to-paid conversion 9%.
- Migrated a legacy UIKit screen set to SwiftUI, reducing UI code by 30%.
Education
B.S. Computer Science — University of California, San Diego
2015 — 2019