Mika U.

iOS Engineer focused on shipping fast, stable, and testable Swift/SwiftUI apps. I work end-to-end: architecture, feature delivery, CI/CD, and quality. Recent work includes a SwiftUI voice recorder using AVFoundation and a StoreKit 2 paywall that lifted paid conversion by 17%. [What I bring] Modernization at scale: migrated 6 Unified Endpoint Management features from Objective-C/UIKit to Swift/SwiftUI, refactoring 10k+ LOC under MVVM and raising test coverage by 30%. I applied protocol-oriented programming and SOLID to make the codebase easier to extend and test. CI/CD you can trust: upgraded pipelines across GitHub Actions, Bitrise, and CircleCI, fixed brittle Fastlane steps, and reduced job processing time by 45%. This keeps releases frequent and reliable. Product impact: renewed a global automotive iPad sales app from Obj-C to Swift/SwiftUI with MVVM and a UI/UX redesign; built OpenAPI-driven stub APIs that cut development time by 30%; led a data/API migration for a student platform across 10+ MySQL databases and 50+ REST APIs, which reduced support calls. [Tech I use] Swift, SwiftUI, UIKit, AVFoundation, StoreKit 2, SPM, CocoaPods, MVVM, Protocol-Oriented Programming, SOLID, XCTest/XCUITest, Fastlane, GitHub Actions, Bitrise, CircleCI. [A bit more about me] I speak at community events and stay close to platform changes. At iOSDC Japan I presented on upcoming Privacy Manifest changes to an audience of 400+. If you need an iOS engineer who can modernize legacy code, build audio-centric features, harden pipelines, and ship measurable outcomes, let’s talk.