Roman Smirnov - Mobile Developer

About me

End-to-end mobile and server solutions

I build modern apps for Android, iOS, and PHP web backends. My approach covers the full cycle: from idea and design to release and support.

On mobile I use native technologies — Kotlin/Java for Android and SwiftUI/UIKit for iOS. I focus not only on visuals, but also performance, UX, and stability for current OS versions.

On the backend I use PHP 8.3 with PostgreSQL/MySQL, REST APIs, and secure data exchange architecture. I design DB schemas, query logic, and logging so services stay scalable and reliable.

Every project is more than code — it’s a complete product with clear architecture, visual identity, and user‑friendly logic.

Skills

Android development (Kotlin, Java, Android Studio, Material You, Jetpack, Room, WorkManager)

iOS development (Swift, SwiftUI, UIKit, adaptation for iPhone/iPad, App Store publishing)

Backend development (PHP 8.3, REST APIs, JSON integrations, authorization, request handling, logging)

Databases (PostgreSQL, MySQL, SQLite — schema design, query optimization, transactions)

Web interfaces and admin panels (HTML5, Bootstrap 5, AJAX, dynamic tables and modals)

UI/UX design and visual identity (Material Design 3, responsive layouts, user flow design)

Publishing and maintenance (Google Play, RuStore, App Store — metadata, banners, icons, localization)

Performance optimization (DB tuning, caching, latency reduction, code audit)

Localization and multilingual interfaces (Russian, Kazakh, English)

Integrations with external services (payment gateways, SBP, analytics, third‑party APIs)

Projects

Intuition 54

Installs: —

Platform:

Compact intuition and attention trainer with three modes: Two Cards, Three Cards, and Coin. Make choices, compare results, and improve your hit rate from session to session.