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Lucas Santos

@lucassantos6

Android Engineer with urban mobility and digital payments experience; modernized app screens and fixed production bugs across mobile products.

Brazil

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What I'm looking for

I'm interested in remote international opportunities as an Android Engineer or Mobile Software Engineer, working with modern Android stacks and distributed teams.

At Gaudium, I developed Android applications for an urban mobility platform, modernized all driver-app screens, and delivered features across driver and passenger apps. I also fixed production bugs and crashes and implemented offline data handling for active rides.

At SiDi, I developed and maintained Android features for a digital wallet and mobile payments ecosystem. I fixed production bugs and contributed to migrating legacy screens to Jetpack Compose and Java classes to Kotlin.

At Secretaria Municipal de Saúde Manaus, I develop end-to-end features and led the migration of more than 10 legacy modules. Before focusing on Android, I built native apps across Apple platforms at Apple Developer Academy @ Instituto Eldorado and won the 2023 Swift Student Challenge. I currently work as a Full Stack Engineer, while my long-term focus remains Android and mobile engineering.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Engineer

Current

Secretaria Municipal de Saúde Manaus

Oct 2025 - Present (1 year)

• Develop end-to-end features for Manaus’ municipal public health ecosystem using PHP, Laravel, Vue.js, and relational databases.
• Led the migration of 10+ legacy modules to a newer application architecture, improving maintainability and simplifying future development.
• Work across a wide range of systems, from internal administrative platforms to healthcare applications used daily throughout Ma

Android Engineer

SiDi

Jun 2025 - Mar 2026 (9 months)

• Developed and maintained native Android features for a globally used digital wallet and mobile payments ecosystem using Kotlin, Java, XML, and Jetpack Compose.
• Fixed 15+ production bugs across the Android codebase, improving application stability and reliability in a large-scale payments environment.
• Migrated legacy Android screens from XML to Jetpack Compose, contributing to the modernizati

Android Engineer

Gaudium

Jun 2024 - Jun 2025 (1 year)

• Developed and maintained native Android applications for a high-traffic urban mobility platform using Java, XML, REST APIs, and Firebase Crashlytics.
• Independently migrated and modernized all driver-app screens, rebuilding the UI layer in XML/Java and refactoring legacy flows and data structures.
• Fixed 50+ bugs and 50+ production crashes and delivered 15+ new features across driver and passe

iOS Engineer

Apple Developer Academy @ Instituto Eldorado

Jan 2022 - Dec 2023 (1 year 11 months)

• Built 10+ native iOS applications from scratch, working across the full product lifecycle from ideation, requirements gathering, and prototyping to implementation and release.
• Collaborated with multidisciplinary teams to publish nearly 10 applications on the App Store, using Swift, SwiftUI, UIKit, CoreData, Firebase, and Apple platform frameworks.
• Developed applications and games across iOS,