Performance
Cut iOS App Launch Time from 8s to 1.2s
E-commerce Mobile App
10 days
Swift
Core Data
URLSession
UIKit
Client Testimonial
“Our app went from being embarrassingly slow to one of the fastest e-commerce apps on iOS. Sebastian's optimization work directly translated to revenue growth.”
VP of Engineering
Facing a Similar Problem?
I specialize in diagnosing and fixing critical iOS, ARKit, and visionOS issues that are blocking your launch or costing you users and revenue.