leoncio giovanni chiunti rosado

Built and maintained Kotlin Android features integrating GraphQL and backend services, applying MVVM/Clean Architecture and dependency injection. Optimized automated test execution and worked with GitHub CI/CD and GitFlow.

Developed Kotlin Android components for a high-traffic retail application consuming large-scale GraphQL services with Apollo GraphQL. Implemented repository and data-layer patterns for remote data access and asynchronous operations.

Integrated enterprise REST services with Retrofit and multi-environment configuration while delivering production Android features. Used Jenkins CI/CD, Bitbucket, GitFlow and Gradle while maintaining automated test coverage.

Modernized the application by migrating dependency injection from Dagger to Hilt, architecture from MVP to MVVM, and asynchronous work from RxJava to Coroutines/WorkManager. Prepared a white-label application using product flavors and introduced a Wear OS feature.

Integrated NetPay and Kushki payment SDKs, including scheduled/immediate payment flows and asymmetric encryption for transaction security. Led code reviews, architecture improvements and reusable-library development using SOLID and Clean Architecture practices.

Delivered and maintained Android applications in Java/Kotlin, led code reviews and improved architecture across multiple client products. Migrated direct OkHttp networking to Retrofit-based service abstractions and contributed reusable components.

Built enterprise Android applications using Java/Kotlin, RxJava/services, SQLite, networking and barcode/QR workflows. Contributed to architecture planning, code reviews, analytics/crash tracking and API integrations.

B.S. Mechatronics Engineering from ITSX, completed in 2016.

Informatics Technician from CBTIS, completed in 2012.