Marcus Vinicius Maia de Freitas
I am a Senior Software Engineer and Software Architect with over 15 years of experience in building scalable, high-quality applications.
About
I am a Senior Software Engineer and Software Architect with over 15 years of experience in building scalable, high-quality applications. I specialize in Kotlin and Android development, and I have a strong background in backend programming. I am passionate about mentoring teams and collaborating with cross-functional stakeholders to deliver impactful products. My goal is always to ensure performance and maintainability in every project I undertake.
- 18 years' experience
- Joined December 2025
Industry experience
- Computers & Electronics
- Software & Internet
- Financial Services
- Media & Entertainment
- Healthcare
More experts in Rio de Janeiro, Brazil
Work experience· 6 roles
Defined and implemented technical solutions ensuring scalability, maintainability, and performance. Joined the PicPay team, building UI components with Jetpack Compose and enhancing design consistency. Led the Android Chapter, fostering knowledge sharing and process improvements. Mentored developers, created proposals, and estimated feature development effort.
Built a baseband firewall app from scratch, leveraging modern Android architectures and modularization. Designed and implemented a design system library with Jetpack Compose for GSMK’s custom Android ROM. Developed UI automation tests with Appium (Java) for quality assurance. Integrated C++ libraries via JNI, optimizing performance and memory management.
Led a complete UI overhaul with Jetpack Compose, creating a reusable design system library. Architected a modularized codebase, transforming a monolith into scalable, testable modules. Expanded automated testing from just a few tests to over 2,000, improving release confidence.
Education
Certifications and awards
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