Mark V.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

iOS Engineer with 15+ years of experience building production-grade applications across the full Apple ecosystem — iOS, iPadOS, macOS, tvOS, and visionOS. Deep expertise in Swift, SwiftUI, UIKit and modern concurrency. Strong background in app architecture, performance optimization, Objective-C to Swift migration, client-server integrations, and cross-platform Apple development. Actively leverage AI-assisted development tools to accelerate delivery, automate test generation, streamline code review, and improve overall code quality.