Open to opportunities

Gaston Montes

@gastonmontes

Message

I build reliable iOS and Android apps with modern native and hybrid frameworks.

Argentina

Message

What I'm looking for

I'm looking to build and improve mobile products where I can solve challenging problems, modernize apps with current iOS and Android technologies, contribute to architecture and processes, and collaborate closely with teams and clients.

I've built and modernized mobile products for Mercado Libre, Venmo, Rappi, CookUnity, Santillana, Despegar, and Etermax. Most recently, I implemented a native ArUco marker scanner for multiple-choice exam recognition and integrated it into a React Native app through native modules.

I work across iOS and Android with Swift, Objective-C, Kotlin, Java, SwiftUI, Jetpack Compose, React Native, Flutter, and Kotlin Multiplatform. I've rewritten legacy applications, introduced modern UI frameworks, built reusable components, improved stability, and reduced PassApp crashes from 34k to 35 over the latest 90 days.

I enjoy challenges, researching new technologies, and helping other developers; I'm in the top 15% on Stack Overflow. I apply Clean Architecture, MVC, MVP, MVVM, VIPER, SOLID, GRASP, TDD, and BDD to deliver maintainable mobile software.

Experience

Work history, roles, and key accomplishments

Senior Mobile Developer

Aerolab Santillana

May 2025 - Jan 2026 (8 months)

Implemented a native ArUco-based marker scanner for multiple-choice exam recognition and integrated it into a React Native app via native modules.

Swift SwiftUI iOS Kotlin Jetpack Compose React Native Git GitHub OpenCV

iOS Senior Developer

Andina CookUnity

Oct 2024 - May 2025 (7 months)

Resolved critical bugs to enhance app stability and user experience, and developed new features.

Swift SwiftUI iOS Git Gitlab

iOS Senior Developer

Invex Now

Feb 2024 - Sep 2024 (7 months)

Resolved critical bugs, fixed synchronization issues, introduced SwiftUI, and defined coding standards and processes.

Swift UIKit SwiftUI iOS Git Gitlab

Mobile Developer

Freelancer

Feb 2023 - Jan 2024 (11 months)

Created a reusable Bluetooth GPS component and developed iOS and Android apps from scratch using Clean Architecture and MVVM.

Swift SwiftUI Kotlin Jetpack Compose Clean Architecture SOLID iOS Android Git Gitlab

iOS Developer and Mobile Team Leader

Kenility

Sep 2021 - Nov 2022 (1 year 2 months)

Rewrote the TruVideo application into a new iOS app called ACVAuctions, developed new features, resolved bugs, and refactored legacy code.

Swift SwiftUI Combine Git Gitlab Jira Swift Package Manager

iOS Senior Developer

DataArt

Jun 2020 - Aug 2021 (1 year 2 months)

Developed new features, resolved critical bugs, refactored legacy code, and improved compilation times for the Rappi app.

Swift Objective C Git GitHub Confluence Jira Cocoapods

Mobile Team Leader

Geopagos

Jan 2019 - May 2020 (1 year 4 months)

Led the Loyalty team, developing new features, bug fixing, and refactoring Android and iOS applications.

Swift Objective C Kotlin Java Git GitHub Confluence Jira Cocoapods

iOS Senior Developer

Blue Trail Software

Apr 2017 - Dec 2018 (1 year 8 months)

Developed many applications from scratch and helped startups build their MVP applications.

Swift Kotlin Java Objective C Git GitHub Confluence Jira Cocoapods

iOS Developer

Mercado Libre

Aug 2016 - Mar 2017 (7 months)

Worked as an iOS developer and release manager, created a new architecture for checkout, and spearheaded the design of Mercado Libre's first Server-Driven UI service.

iOS MVVM Server Driven UIs Swift Git

iOS and iOS I+D Developer

Technisys

Aug 2015 - Jul 2016 (11 months)

Developed core applications for clients, supported iOS teams, and created a pod to connect JavaScript backend with Swift frontend.

Swift JavaScript Git Cocoapods

iOS Developer

Despegar

Jan 2014 - Jul 2015 (1 year 6 months)

Developed the iPhone and iPad applications from scratch and resolved critical bugs.

iOS Swift Git

iOS Developer

Etermax

Jan 2013 - Dec 2013 (11 months)

Developed the Angry Words and Angry Mix games from scratch, and created a library for animations.

iOS Swift Animation

iOS & Java Developer

FDV Solutions

Jan 2010 - Dec 2012 (2 years 11 months)

Developed a report system for Danone, a library for reports called Dynamic Jasper, and many iOS applications for different clients.

iOS Java

iOS Senior Developer

Transcore

Rewrote the application from Objective-C to Swift, resolved critical bugs, and refactored legacy code.

Swift Objective C Git GitHub Confluence Jira Cocoapods

iOS Developer

Boston Seguros

Rewrote the company application from scratch using SwiftUI.

Swift SwiftUI Combine Git GitHub Swift Package Manager

Mobile Developer

PassApp

Resolved critical bugs, reduced crashes from 34k to 35, migrated code from Objective-C to Swift and Java to Kotlin, and introduced SwiftUI and Jetpack Compose.