Andreas Maier
iOS Engineer
Senior iOS Engineer. 13+ years shipping apps to millions.
iOS Engineer
Senior iOS Engineer. 13+ years shipping apps to millions.
A snapshot of who I am and what I do.
Senior iOS Engineer with 13+ years building production apps across fintech, telecom, AR, and edtech. Shipped apps serving millions of daily users at Alfabank, Megafon, and Yandex. Passionate about clean architecture, mentoring, and shipping polished user experiences.
Technologies and tools I work with every day.
From startups to top banks β building apps that scale.
Swift, UIKit, CoreData, MVVM, XCTest
Revamped Core Data curriculum chapter from scratch, improving course completion rates. Authored new course modules on testing and localization. Conduct regular live webinars with growing attendance. Mentored 50+ students through code reviews and 1-on-1 sessions.
Swift, SwiftUI, UIKit, async/await, Combine, Compositional Layout, REST API, Realm, MVVM
Built OfflineDay digital detox app from scratch (iPhone, iPad, Mac, Vision Pro). Maintained and enhanced CocoonWeaver voice notes app. Introduced SwiftUI components and modern concurrency patterns.
Swift, UIKit, REST API, CoreData, MVP
Implemented deep linking system enabling seamless in-app navigation. Delivered UI improvements for key user-facing screens.
Swift, UIKit, async/await, Compositional Layout, REST API, Realm, MVP
Led remaster of CocoonWeaver's core screens, improving reusability across features. Implemented subscription system with StoreKit. Migrated legacy networking to async/await.
Swift, UIKit, REST API, YARCH Architecture
Developed Swift-based payment module serving millions of banking app users. Implemented QR-payment system with modern scanning library. Built document upload feature for loan applications. Contributed to app used by 10M+ monthly active users.
Swift, UIKit, REST API, MVC, CoreAnimation
Architected and shipped 10+ iOS apps from scratch including VPN clients and utility apps. Designed reusable architecture templates adopted across all new projects. Sole iOS developer on multiple concurrent products.
Swift, REST API, CoreData, ARKit, Vision
Led complete app relaunch with redesigned architecture. Implemented AR-powered facial mapping for personalized emoji generation. Built custom sticker pack system with iMessage integration. App featured in App Store editorial.
Swift, UIKit, REST API, Realm, VIPER
Built real-time messaging module for B2B platform. Implemented offline-first architecture with Realm sync.
Swift, REST API, RxSwift, MVVM
Developed multiple client projects from scratch at a top Russian digital agency. Introduced reactive programming patterns with RxSwift.
Objective-C, Swift, REST API, Realm, CoreAnimation
Led iOS development and established code review practices. Screened and interviewed developer candidates. Supervised junior developers and interns, leveraging teaching background.
Objective-C, REST API, CoreData, WatchKit
Developed Megafon Personal Account app as sole iOS engineer β one of Russia's most-downloaded telecom apps. Built Apple Watch companion app. Shipped features serving 20M+ subscribers.
Objective-C, REST API, CoreData, SQL
First professional iOS role. Built multiple client apps from scratch. Established foundation in iOS development, networking, and data persistence.
Some of the products I helped build.
Academic background and teaching experience.
15+ years as university professor of Computer Science. Conducted classes on programming languages, algorithms, and software engineering at Krasnoyarsk State Pedagogical University.