Oleksandr L.

For the past 10 years I’ve been a core iOS developer on FUTBIN, one of the most popular EA FC Ultimate Team companion apps. I know how to keep a large, long-lived codebase fast, stable and shipping, while adding features users actually notice. I can help if you have an iOS app and need: Bug fixing, crash reduction and performance improvements Refactoring and modernizing old Swift / Objective-C code New features in an existing codebase without breaking what works In-app purchases and subscriptions done right A new app taken from idea to App Store release Why work with me: 10+ years of production iOS experience $50K+ earned and 2,600+ hours on Upwork with 5-star feedback Master’s degree in engineering: comfortable with technical, data-heavy and calculation-based apps I use modern AI-assisted development tools, so I move fast without cutting corners Tech stack: Languages: Swift, Objective-C UI: UIKit, Auto Layout, Interface Builder (xib, storyboards) Data: Core Data, Realm, REST APIs Firebase: Analytics, Firebase, Push Notifications (APNs) Monetization: StoreKit 2, consumable / non-consumable purchases, auto-renewing subscriptions Maps & location: MapKit, Core Location Release: TestFlight, App Store review and publishing Send me a short description of your app and the problem. I’ll reply with a clear plan and estimate.