Ione Souza
Staff Software Engineer at Mercos
Brasília, Federal District, Brazil
Summary
👤
Senior🎓
Top SchoolIone Souza is a Staff Software Engineer in Brasília with 14+ years of experience building scalable mobile and backend systems, driving re-architectures, and shaping technical strategy. She has a strong track record of operational impact—cutting build times by 80%, shrinking hotfix lead time from days to hours, and reducing UI testing costs by 60% while unlocking unlimited test minutes. A hands-on mobile engineer and test automation advocate, she has contributed UI tests to high-profile projects like Xamarin.Forms and .NET MAUI and improved Firefox for iOS testability. Ione combines deep platform engineering (Xamarin/.NET MAUI, native iOS/Android, CI/CD) with people leadership—mentoring engineers, running onboarding programs, and aligning roadmaps with product and UX. She’s known for creating reusable platforms that enabled new business models and for pragmatic, observability-driven approaches that raise team velocity and reliability.
14 years of coding experience
12 years of employment as a software developer
Bachelor's degree Systems Analysis and Development, Bachelor's degree Systems Analysis and Development at Católica de Santa Catarina - Centro UniversitárioPontifical Catholic University of Paraná
English, Portuguese, Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (22)
ios10
testing10
xamarin10
dotnet-new10
dotnet10
user-interface10
ui-design10
uid10
xamarin-forms10
front-end-development10
android10
dotnet-core10
swift10
gui-testing10
csharp10
Programming languages (8)
Github contributions (5)
xamarin/Xamarin.Forms
Oct 2018 - Feb 2019
Xamarin.Forms Official Home
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:5 commits, 5 PRs, 15 comments in 4 months
Contributions summary:Ione's contributions primarily involve adding and modifying UI tests within the Xamarin.Forms framework. They implemented UI tests for specific bug fixes, ensuring the correct functionality of UI elements across Android and iOS platforms. Furthermore, the user focused on the testing of accessibility features and general UI behavior by interacting with list items and buttons within the application. The commits showcase the creation of test scenarios and the refactoring of UI test execution.
user-interfacexamarincross-platformxamarin-formsmicrosoft
mozilla-mobile/firefox-ios
Apr 2024 - Mar 2025
Firefox for iOS
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:49 reviews, 55 PRs, 104 comments in 11 months
Contributions summary:Ione primarily focused on refactoring and improving the Firefox for iOS application. Their work involved updating UI elements, specifically fonts, across various panels like DownloadsPanel, HistoryPanel, and ReaderPanel. Further contributions include resolving SwiftLint violations, enhancing testability by injecting mock objects, and addressing flaky unit tests within the BookmarksPanel. The user demonstrated proficiency in iOS development by modifying existing Swift code, and interacting with the UI components and testing frameworks.
firefoxbrowserios-appswiftios
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