Julio Mussi

Senior Mobile Engineer & Tech Lead

Julio Mussi is a Senior React Native Engineer and Lead Software Engineer with 8+ years of mobile development experience. He specializes in React Native, TypeScript, mobile architecture, CI/CD, and app store delivery, with experience leading mobile squads, improving app stability, reducing app size, and shipping features used by 150K+ monthly active users.

Areas of Expertise

React NativeTypeScriptJavaScriptRedux.jsSystem ArchitectureMobile CI/CDMobile DevOpsFastlaneXcodeXcode CloudBitbucket PipelinesApp Store PublishingThird-Party SDK IntegrationAPI IntegrationSwiftObjective-CJavaPythonExpo UnimodulesBiometric AuthenticationSecure StorageClean ArchitectureSOLID Principles

Education

Bachelor’s degree in Computer Engineering from Universidade Salvador. He also completed a Swift/iOS certification focused on Xcode development.

Articles by Julio Mussi

Software Engineering

Upgrade React Native 0.70 to 0.81 in Two Weeks

A React Native upgrade is one of those tasks that looks straightforward on paper and turns into a multi-week ordeal in practice. This is the story of how to took a production app from React Native 0.70.15 to 0.81.6 in about two focused weeks. Incrementally, with stable branches ready for QA along the way. For…

Julio Mussi May 6, 2026 9 min read

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