Germán Guevara
Senior Mobile Engineer with 7+ years of experience specializing in high-security Fintech 💳 and Government 🏛️ applications. Expert in native Android development (Kotlin/Java 📱, Jetpack Compose 🎨) with a strong track record in Clean Architecture 🏗️ and CI/CD 🔁 implementation. Recently expanded technical scope to deliver full-stack solutions using Golang 🐹 (Backend) and Next.js ⚡ (Frontend). Proven ability to work remotely as a contractor for international clients.
About me
A pragmatic problem solver and integrative thinker, connecting theory to practical deployments. Expert in Android-Kotlin 📱, Flutter 🎯, Docker 🐳, Golang 🐹 and scalable backend architectures
- Location:Puerto Ordaz, Venezuela
- Age:29
- Nationality:Venezuelan
- Interests:Music, Table Tennis, Arduino
- Study:National Experimental University of Guayana
Work
Senior Android Developer (Contractor)
- Architected and maintained secure payment libraries for Fintech clients, following strict financial security standards.
- Led migration from XML views to Jetpack Compose, improving UI performance and reducing boilerplate.
- Implemented robust OAuth 2.0 authentication flows and integrated complex third‑party payment SDKs.
- Worked in Agile teams using Jira and GitLab CI/CD for automated testing and deployments.
Android Developer (Contractor)
- Led Android development for a large-scale government app, serving inspectors and citizens.
- Refactored the codebase to adopt Clean Architecture and MVVM, reducing technical debt.
- Integrated Google Maps for geospatial visualization and tracking of incidents.
- Optimized CI/CD pipelines to streamline release cycles.
Android Developer
- Developed Point of Sale (POS) applications for specialized hardware, integrating thermal printers, barcode scanners and NFC readers.
- Used RxJava to manage complex asynchronous transaction flows.
- Integrated with Java Spring Boot backends to process secure transactions.
Android Developer
- Built mission-critical applications for alarm monitoring centers with emphasis on reliability and real-time data delivery.
- Implemented real-time push notifications (FCM) and socket-based connectivity.
- Designed a modular structure using Android Flavors for white-labeling multiple clients from a single codebase.
- Managed dependency injection with Dagger/Hilt to improve testability and modularity.
Android Developer
- Maintained cash flow control applications for casino operations, ensuring accuracy in financial reporting.
- Refactored legacy Java code to improve stability and prevent memory leaks.
Skills
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Get in touch.
Contact me for freelance projects or full-time opportunities. I am currently available for new challenges and collaborations.
- Phone
- (+58) 424 9394649
- Location
- Puerto Ordaz, Venezuela
- @german_2496