Douglas Mandarino
I'm Douglas Mandarino, a Senior iOS Software Engineer with 10+ years of experience building high-performance mobile applications in Swift and Objective-C.
About
I’m Douglas Mandarino, a Senior iOS Software Engineer with 10+ years of experience building high-performance mobile applications in Swift and Objective-C. I excel in iOS architecture, authentication systems, session management, and building shared libraries used across multiple apps. I enjoy tackling challenging problems and delivering robust, user-friendly experiences.
I’ve collaborated with Apple internal teams as a contractor and led critical platform work at Uber. My expertise spans Swift Concurrency, SwiftUI, Combine, RxSwift, UIKit, GraphQL, and REST APIs, and I have contributed to open-source projects including the Apollo GraphQL Client.
- 14 years' experience
- Joined February 2026
Skills· 5
Languages
- EnglishFluent
- PortugueseFluent
Industry experience
- Software & Internet
- Media & Entertainment
- Transportation & Logistics
- Professional Services
More experts in Rio de Janeiro, Brazil
Work experience· 8 roles
Collaborate directly within Apple’s GSSM internal team on iOS and macOS applications. Design and implement features focused on performance, reliability, and user experience. Maintain and evolve components while introducing modern Swift and SwiftUI patterns.
Developed and maintained complex iOS applications for international clients. Designed scalable architectures and improved performance using modern Swift features.
Led OAuth 2.0 refactoring into a shared authentication library used by 100% of app traffic. Implemented cross-app login and supported Postmates account integration.
Education
Hire Douglas Mandarino today
Post a job and invite Douglas, or contact them directly. No hidden commission.