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Caio César FernandesCF
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Caio César Fernandes

@caiocsarfernandes

I build secure, high-performance Android systems for BMW vehicles and banking products.

Portugal
Message

At Critical TechWorks for BMW Group, I develop Android Automotive OS applications using Kotlin and Jetpack Compose, integrating vehicle platform services and proprietary automotive frameworks.

I lead performance analysis with Perfetto, Android StrictMode, and LeakCanary, while improving modularity and testability through Koin, multimodular architecture, and automated unit, integration, and UI testing.

Previously at BTG Pactual, I led mobile security architecture for Brazil's largest investment bank, implementing DexGuard protections, Frida penetration testing, BioCatch behavioral biometrics, and FaceTec liveness detection to reduce fraud and runtime manipulation risks.

I also created PerfKit, an open-source modular Android SDK that detects and classifies StrictMode violations in real time through a Jetpack Compose debug panel without impacting production builds.

Experience

Work history, roles, and key accomplishments

AG
Current

Senior Android Developer

Aubay | Critical TechWorks (BMW Group)

Oct 2025 - Present (10 months)

Develop Android applications for the automotive domain targeting Android Automotive OS (AOSP) using Kotlin and Jetpack Compose. Integrate with vehicle platform services and proprietary automotive frameworks within a complex embedded environment.

Education

Degrees, certifications, and relevant coursework

Universidade Federal do Para logoUP

Universidade Federal do Para

Bachelor of Engineering, Computer Engineering

Completed a degree in Computer Engineering at Universidade Federal do Para in 2018.

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