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Hi, I’m Marco Eduardo Ferreira Junior, a Senior Android Engineer based in Recife, Brazil, with 7+ years of experience building large-scale mobile apps for fintech, e-commerce, and logistics. I specialize in Kotlin, Jetpack Compose, Clean Architecture, and modern CI/CD practices, with a strong focus on code quality, testing, and performance. I thrive in cross-functional teams, mentoring peers and delivering practical, maintainable solutions. I’m actively exploring AI automation using n8n and multi-channel integrations to streamline workflows and unlock new opportunities.…Hi, I’m Marco Eduardo Ferreira Junior, a Senior Android Engineer based in Recife, Brazil, with 7+ years of experience building large-scale mobile apps for fintech, e-commerce, and logistics. I specialize in Kotlin, Jetpack Compose, Clean Architecture, and modern CI/CD practices, with a strong focus on code quality, testing, and performance. I thrive in cross-functional teams, mentoring peers and delivering practical, maintainable solutions. I’m actively exploring AI automation using n8n and multi-channel integrations to streamline workflows and unlock new opportunities.

Marco Eduardo Ferreira Junior

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Hi, I’m Marco Eduardo Ferreira Junior, a Senior Android Engineer based in Recife, Brazil, with 7+ years of experience building large-scale mobile apps for fintech, e-commerce, and logistics. I specialize in Kotlin, Jetpack Compose, Clean Architecture, and modern CI/CD practices, with a strong focus on code quality, testing, and performance. I thrive in cross-functional teams, mentoring peers and delivering practical, maintainable solutions. I’m actively exploring AI automation using n8n and multi-channel integrations to streamline workflows and unlock new opportunities.…Hi, I’m Marco Eduardo Ferreira Junior, a Senior Android Engineer based in Recife, Brazil, with 7+ years of experience building large-scale mobile apps for fintech, e-commerce, and logistics. I specialize in Kotlin, Jetpack Compose, Clean Architecture, and modern CI/CD practices, with a strong focus on code quality, testing, and performance. I thrive in cross-functional teams, mentoring peers and delivering practical, maintainable solutions. I’m actively exploring AI automation using n8n and multi-channel integrations to streamline workflows and unlock new opportunities.

Available to hire

Hi, I’m Marco Eduardo Ferreira Junior, a Senior Android Engineer based in Recife, Brazil, with 7+ years of experience building large-scale mobile apps for fintech, e-commerce, and logistics. I specialize in Kotlin, Jetpack Compose, Clean Architecture, and modern CI/CD practices, with a strong focus on code quality, testing, and performance.

I thrive in cross-functional teams, mentoring peers and delivering practical, maintainable solutions. I’m actively exploring AI automation using n8n and multi-channel integrations to streamline workflows and unlock new opportunities.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Portuguese

Fluent

English

Advanced

Spanish; Castilian

Beginner

Work Experience

Senior Android Engineer at CI&T

August 1, 2024 - Present

Developed a critical mobile feature preventing a potential US$3M revenue loss. Applied Jetpack Compose and Clean Architecture with MVVM for scalable features. Collaborated with international teams in agile environments.

Senior Android Developer at DBC Company

August 1, 2024 - October 13, 2025

Optimized transaction flows, reducing support requests by 80%. Led code reviews and ensured test coverage.

Android Developer at Americanas Delivery

December 1, 2021 - October 13, 2025

Led a team of 5 Android developers on a high-growth e-commerce project. Migrated legacy app to Kotlin + MVVM, improving maintainability. Implemented Crashlytics and Bitrise CI/CD, optimizing release cycles. Contributed to record-breaking sales via UX and performance improvements.

Android Developer at Build Care

August 1, 2020 - October 13, 2025

Built an inspection app reducing workflow from 30 to 14 days. Improved UX through user feedback and optimized layouts.

Android Developer at ABA Global Education

April 1, 2019 - October 13, 2025

Created a parent-school communication app independently. Reduced support calls by implementing a feedback-driven UX.

Teaching Assistant at UFR PE

July 1, 2019 - October 13, 2025

Taught Android development, Spring Boot, and web basics. Mentored students in mobile best practices and clean code.