RemoteYeah
F
Facundo Castro
From Uruguay 10:45 AM (GMT-03:00)
$26/hr or $50,500/yr
Active over a week ago
Member since Apr 2026

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Senior Android Engineer

Android Developer
Available for hire
Years of experience
6+ years
Experience level
Senior
Available for
Full-time, Part-time, Contract, Freelance

Senior Android Engineer with over 6 years of experience building scalable, mission-critical mobile applications. My core expertise lies in modern Android development using Kotlin and Jetpack Compose, with a strong background in Fintech, mobile payment architectures, and hardware integrations.

I am passionate about bridging the gap between pixel-perfect UI design and robust, offline-first mobile architecture. I strongly advocate for engineering best practices, including automated testing, CI/CD pipelines, and the integration of AI tools to reduce technical debt and optimize the software development lifecycle.

Currently completing my degree in Systems Engineering at Universidad ORT Uruguay, I am always looking for complex technical challenges where I can build secure, high-impact products from the ground up.

Skills

Scrum GraphQL Docker AWS Flow GitLab GCP Dagger Firebase Firestore Git GitHub Agile CI/CD Generative AI Flutter Kotlin Dart Groovy Xamarin Gradle

Languages

English Spanish Portuguese

Employment History

Senior Android Engineer at Geopagos Current 2021 - Now
Core Focus: Mobile Payment Architecture & Security • Readers SDK & Merchant UI: Architected the core middleware for POS devices and built the reactive UI layer using Jetpack Compose. Translated complex hardware states (Bluetooth/SmartPOS) into intuitive checkout screens, processing over 150M+ transactions annually. • Tap on Phone Development: Engineered the NFC interaction layer that enables standard Android devices to accept contactless payments by communicating directly with the payment kernel. • EMV & PCI Compliance: Led the technical implementation of security protocols to achieve rigorous international certifications (EMV & PCI MPoC), ensuring compliance across 15+ LATAM countries. • Developer Experience (DX) & AI: Integrated AI-assisted workflows into the development lifecycle to generate rigorous unit tests and refactor legacy payment modules, significantly reducing technical debt.
Xamarin Developer at UXDivers 2020 - 2021
Core Focus: High-Performance UI & Custom Controls Development • Grial UI Kit Engineering: Developed complex UI components for the market-leading Xamarin Forms UI kit, ensuring pixel-perfect implementation across multiple devices and screen sizes. • Custom Control Implementation: Leveraged SkiaSharp to build highly performant, custom-drawn controls directly on the canvas, solving complex visualization challenges beyond standard framework limitations. • Client Solutions: Delivered tailored mobile solutions for international clients, effectively bridging the gap between design concepts and functional, maintainable code.

Education

Bachelor of Systems Engineering at Universidad ORT Uruguay 2015 - 2026
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