Cristhian Leon
Senior Mobile Engineer
A dynamic, hands-on, detail-oriented iOS developer with 8+ years of experience in building apps for iOS, now focused on backend development using Java and Spring Boot.
Download CVMy Stack
iOS
Swift
SwiftUI
Combine
Async/Await
MVVM-C
Fastlane
Backend
Java
Spring Boot
Spring JPA
REST APIs
PostgreSQL
Gradle
My Experience
Senior iOS Developer
Gorilla Logic / Colombia / 2022- Implemented MVVM-C pattern.
- Boosted CoreData performance by 15%.
- Enabled PCI compliant credit card feature.
Stack: CoreData, Combine, Async/Await, UIKit
Senior iOS Developer
Airtm Inc. / Mexico / 2022- Co-created app from scratch.
- Enhanced Android team's GraphQL usage.
- Developed modular app using SPM.
Stack: SwiftUI, Combine, GraphQL, Fastlane, SPM
Senior iOS Developer
Florio GmbH / Germany / 2020- Led multi-tenancy feature implementation.
- Maintained Apple Watch and Siri extension.
- Redesigned UI with UIKit and CoreGraphics.
Stack: UIKit, UITest, HealthKit, Fastlane
Senior iOS Developer
Wunder Mobility / Germany / 2019- Created UIKit library for custom brand styles.
- Increased test coverage by 20%.
- Reduced build times by 15% with Python scripts.
Stack: RxSwift, GraphQL, Realm, Firebase
iOS Developer
Globant / Colombia / 2018- Improved test coverage by 60% in app modules.
- Refactored Objective-C code to Swift.
- Enhanced test monitoring with SonarQube.
Stack: Swift, Obj-C, XCTest, CoreAnimation
iOS Developer
Novopayment / Colombia / 2017- Implemented face recognition user enrollment.
- Built OCR for passport information.
- Developed user creation framework for bank apps.
Stack: CoreGraphics, Vision, UIKit, Carthage
