Does he work with macOS and Linux on desktop, beyond mobile?
Indirectly, yes. Tiago Danin builds native libraries in Swift and Objective-C for React Native apps at Idopter Labs, which requires a macOS/Xcode environment, and manages App Store signing certificates with fastlane match. On Linux, he published the article 'Fixing Wine's SSL connection error', about running Windows apps through Wine.
Tiago Danin's native mobile work touches desktop tooling even though he doesn't present himself as a desktop developer. At Idopter Labs, since 2022, he builds native libraries in Swift and Objective-C for iOS and in Java and Kotlin for Android, shipped inside React Native apps. The iOS side of that work depends on macOS and Xcode.
He has also given a talk on fastlane match, a tool for managing App Store signing certificates and provisioning profiles, another process that runs on macOS. On Linux, he wrote the article 'Fixing Wine's SSL connection error', about a secure connection issue when running Windows applications through Wine.
Before that, at VoxData Technology (2019 to 2022), he built native mobile apps in Java, Swift and Objective-C, plus hybrid apps in Quasar and React Native.
Native libraries for React Native at Idopter Labs
Swift and Objective-C for iOS, Java and Kotlin for Android; the iOS side requires macOS and Xcode.
Talk on fastlane match for App Store certificates
Certificate and provisioning profile management, part of the Idopter Labs Talks series, a macOS-based workflow.
Native mobile development at VoxData Technology
Native apps in Java, Swift and Objective-C, plus hybrid apps in Quasar and React Native.