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Tharsis Queiroz

@tharsisqueiroz

I build scalable mobile apps for major brands using Kotlin, Flutter, and React Native.

Brazil
Message

I've built high-traffic mobile features for Burger King, Natura, Casas Bahia, and banking products, including promotional campaigns serving more than 10 million users and payment flows processing 50,000+ daily transactions.

At Casas Bahia, I implemented user-tagging persistence and an A/B testing platform that improved user-flow tracking by 40% and increased engagement by 20%. Previously at InEvent, I modernized a legacy Java codebase to Kotlin and MVVM, reducing crash rates by 45% while strengthening authentication and sensitive-data privacy.

I work across Kotlin, Java, Flutter, React Native, Clean Architecture, CI/CD, and data-driven mobile optimization.

Experience

Work history, roles, and key accomplishments

CB
Current

Android Developer (Mid-Level)

Casas Bahia

Feb 2026 - Present (7 months)

Led implementation of a user-tagging persistence system, improving user flow tracking by 40%. Rolled out A/B testing platform, increasing user engagement by 20%, and configured automated tests and monitoring to reduce critical bugs by 35%.

InEvent - Event management software logoIS
Current

Android Developer

Sep 2024 - Present (2 years)

I led the evolution of the InEvent application with a strong focus on security, performance, and architecture. I oversaw a major codebase restructuring, and migrating large portions from Java to Kotlin and modernizing the architecture to MVVM with LiveData and StateFlow.

Duaik Entretenimento LTDA logoDL

Mobile Developer

Duaik Entretenimento LTDA

Jul 2024 - Sep 2024 (2 months)

Developed and maintained the Fruitlab application, creating new features and fixing bugs with a focus on stability and performance. Used GetX for state management, followed MVC and Clean Architecture patterns, and worked with Jira and GitHub within a multidisciplinary team, always prioritizing clear communication and alignment with product objectives.

FreeLancer logoFR

Android Developer

Sep 2023 - Jul 2024 (10 months)

Developed mobile applications focused on performance and modularization, utilizing Jetpack Compose, Flutter, and Clean Architecture. Applied MVVM, SOLID, dependency injection with Hilt, and REST API consumption. Managed state with Bloc and ensured layout adaptation across multiple screen resolutions, delivering robust products with excellent user experiences.

Toodoo LTDA logoTL

Android Developer

Toodoo LTDA

Nov 2021 - Sep 2023 (1 year 10 months)

I developed and maintained cross-platform applications for clients such as Burger King, Natura, and banking institutions, using Kotlin, Java, and Flutter. I applied MVVM and MVC architectures, SOLID principles, and Clean Code practices, alongside CI/CD pipelines for continuous delivery

Education

Degrees, certifications, and relevant coursework

Federal University of Bahia logoFB

Federal University of Bahia

Bachelor of Science, Science and Technology

2019 -

Pursuing a Bachelor's degree in Science and Technology at the Federal University of Bahia.

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