Usman A.

I am a Top Rated Mobile Engineer with hands-on experience building and scaling production-grade Android and iOS applications used by real users and generating real revenue. I’ve led end-to-end development of: • An OTT-style video platform (long-form, short-form, reels, feed-based discovery) • A trivia application with 100,000+ installs, including progression systems, rewards, ads, and IAP • Custom admin panels and backend systems supporting live production traffic I specialize in execution-focused mobile engineering, where scope is clear and delivery quality matters. I’ve frequently worked directly with founders and product owners, translating defined product vision, wireframes, and system logic into production-ready mobile applications with minimal overhead. Core expertise • Android (Kotlin, MVVM) • iOS (SwiftUI / UIKit) • Firebase (Auth, Firestore, Functions) • Backend & admin systems (Node.js, Cloudflare, MongoDB) • Video streaming (HLS), performance optimization • Ads, IAP, analytics, and monetization flows What clients hire me for • Building mobile apps from scratch to production • Translating wireframes and specs into clean, scalable code • Owning features end-to-end (UI → logic → backend → release) • Fixing stability, performance, and architectural issues • Reliable delivery with clear communication and no noise I’m comfortable owning features end-to-end — from concept and architecture through implementation, release, and ongoing improvement — with predictable delivery and accountability.