Omar Elsayed

Technical leadership & architecture

• Led the migration to MVVM architecture, establishing modern design patterns across the app.
• Drove the Swift 6 migration and introduced async/await to the team, including a training session on modern concurrency.
• Migrated dependency management from CocoaPods to Swift Package Manager, reducing app size from 190 MB to 110 MB.
• Modernized app lifecycle from AppDelegate to SceneDelegate.

Tooling & internal APIs

• Built a dependency injection solution, improving modularity and testability.
• Wrote a custom Swift macro that converts callback-based functions to async/await.
• Created a LeakDetector API for proactive memory-leak detection and debugging.
• Designed custom APIs bridging SwiftUI ↔ UIKit gaps, including adaptive sheets and reusable components.
• Authored app documentation with DocC and hosted it on GitHub Pages, making internal APIs easy to discover and adopt.
• Built a PR review tracker website that turned code review into a team game — taking PRs from frequently unreviewed to consistently reviewed within a day.

Feature development

• Integrated the Visa SDK to support adding the Klivvr card to Apple Wallet, building both the WalletUIExtension and WalletNonUIExtension targets.
• Led Apple Watch app development from concept to release.
• Led the adoption of Liquid Glass across the app, modernizing the UI for the latest iOS design language.
• Implemented App Intents, integrating the app with Siri and Shortcuts.
• Built a generic, reusable camera-based ID scanner component.
• Developed the Lending feature module, delivering its core business logic.

Quality & DevOps

• Owned production stability: analyzed and triaged crash reports, and eliminated 100% of launch-time hangs, significantly improving startup responsiveness.
• Enhanced the CI/CD pipeline, cutting execution time from ~30 to 15–20 minutes, improving build reliability, and keeping local and CI environments on the latest Xcode toolchain.

• Improved app loading speed by 80% using TaskGroup and async let.
• Built a custom sheet presentation component for iPad.
• Fixed UI animation bugs across the app.

• Designed and launched the company website.

• Building a native macOS browser with an AppKit + SwiftUI hybrid architecture on top of WKWebView.

• macOS content-filtering app built on Network Extensions (NEDNSProxyProvider) with encrypted DNS-over-HTTPS upstream.
• Engineered XPC-based privilege separation and a LaunchDaemon guardian for tamper protection.

• Co-created swiftui-expert-skill, an open-source AI agent skill for SwiftUI best practices, with Antoine van der Lee.
• Pitched an AsyncQueue proposal on Swift Forums addressing FIFO ordering guarantees at async suspension points.
• Write deep-dive articles on Swift concurrency and SwiftUI at swiftdifferently.com.

• Owned the steering system of the vehicle, built with C and Arduino.
• Integrated the Arduino layer with a high-level control system written in Python.