Hello, I'm Marco!
Senior iOS Engineer with 6+ years building consumer apps at scale, including a core feature serving 3M+ monthly active users. Experienced in Swift, SwiftUI, and UIKit, with a track record of leading architecture decisions in remote, distributed teams across time zones
EXPERIENCE
Stone co.
Senior Software Engineer
● Led the migration of native iOS (Swift/UIKit) and Android (Kotlin/XML) codebases to Kotlin Multiplatform, defining adoption standards for SwiftUI, Jetpack Compose, and Compose Multiplatform. Eliminated 30K+ lines of duplicated code (~70% reduction) and increased cross-platform delivery productivity by ~25%.
● Led the end-to-end development of one of the app's core features, serving more than 3 million monthly active users, covering architecture, technical validation, and production delivery.
● Acted as the mobile team's technical reference, driving architectural decisions, guiding complex implementations, and ensuring adherence to engineering standards and best practices.
● Took part in the AI-assisted development pilot (GitHub Copilot and Claude), delivering a complete feature to production with an estimated 40% reduction in development cycle time. ● Mentored 3 developers through close, hands-on guidance, which included one engineer's full transition from web to mobile development and another's promotion from junior to mid-level.
Tech Stack: Swift, SwiftUI, UIKit, Kotlin, Jetpack Compose, KMP, CMP, MVVM-C, Clean Architecture, REST API, Unit Testing, XCTest, Datadog, Amplitude, GitHub Actions, Bitrise, Fastlane, Git Flow, Firebase Remote Config, Feature Flags, Claude Code, GitHub Copilot
Feb. 2022 - Present
Bradesco Net Empresa
Mid Level Software Engineer
● Maintained and evolved features in the NetEmpresa iOS app, a legacy Objective-C and Swift codebase, resolving critical crashes and stabilizing existing modules.
● Contributed to the codebase migration to Swift and a modern architecture, refactoring legacy modules and raising test coverage from 5% to 40% to improve long-term maintainability.
Tech Stack: Swift, Objective-C, UIKit, MVVM, MVC, View Code, REST API, Unit Testing, GitHub, Git Flow, Firebase Crashlytics, Firebase Remote Config
Feb. 2021 - Feb. 2022
Visionnaire
Junior iOS Developer
● Raised the crash-free session rate of the NetEmpresa iOS app from 83% to 95% by identifying and fixing critical failures tracked through Firebase Crashlytics.
Tech Stack: Swift, Objective-C, UIKit, Storyboard, XIB, REST API, GitHub, Git Flow, Firebase Crashlytics, Firebase Remote Config
Set. 2019 - Feb. 2021
EDUCATION
Systems Analysis and Development (Associate Degree in Technology) (June 2023)
Pontifical Catholic University of Paraná (PUC-PR)
Technical High School Diploma in Computer Science (December 2018)
Federal Institute of Paraná (IFPR)
TECHNICAL SKILLS
iOS - Swift, SwiftUI, UIKit, Objective-C
Cross-Platform - Kotlin Multiplatform (KMP), Compose Multiplatform (CMP), Kotlin, Jetpack Compose
Architecture - MVVM-C, MVVM, Clean Architecture
Testing - XCTest, Unit Testing, Snapshot Testing
CI/CD - Fastlane, GitHub Actions, Bitrise, Git Flow
Observability & Analytics - Datadog, Amplitude, Firebase Crashlytics, Firebase Remote Config
AI-Assisted Development - Claude Code, GitHub Copilot
Tools - Xcode, Android Studio, Jira, Confluence, Git, Feature Flags
LANGUAGES
Portuguese - Native
English - Professional Working Proficiency