Hi, I'm Lilian Mercado. I build elegant, high-performance native iOS applications for startups and Fortune 500 companies across the United States.
A senior iOS developer based in San Francisco, passionate about clean architecture and pixel-perfect interfaces.
I'm Lilian Mercado, a Senior iOS Developer from the San Francisco Bay Area with over 8 years of professional experience building apps used by millions of people across the United States.
My expertise spans the full Apple ecosystem — from Swift and SwiftUI to UIKit, Core Data, Combine, and modern concurrency. I specialize in taking products from concept to App Store, optimizing performance, and leading engineering teams.
When I'm not coding, you'll find me exploring iOS design patterns, mentoring junior developers, or testing the latest beta at WWDC.
Tools and technologies I use to ship production-ready iOS applications.
Modern Swift with async/await, result builders, and type-safe architecture.
Declarative interfaces, animations, and state-driven UI across Apple platforms.
Custom controls, Auto Layout, collection views, and complex transitions.
Persistent data modeling, relationships, migrations, and cloud synchronization.
Reactive programming with publishers, subscribers, and memory management.
Keychain, biometric auth, certificate pinning, and secure networking layers.
A selection of iOS applications I've architected and shipped.
Have an app idea or looking for a senior iOS developer? I'd love to hear about it. Drop me a message and I'll get back to you within 24 hours.