Yercko Montero

Inditex. Contributed to the development of high-quality Android applications, focusing on scalable architecture and modern development practices: * Developed and maintained reusable architectural components using Kotlin, Jetpack Compose, Coroutines, Koin. Implemented unit and instrumentation tests with JUnit, Mokk. * Managed dependencies and automated workflows with Gradle(8.5), continuous integration via GitHub Actions, and version control with Git. * Collaborated in the full development lifecycle, applying Clean Architecture and SOLID principles to enhance user experience and code quality.

Worked across two major financial projects (Banco Sabadell and OpenBank – Santander USA), contributing as both a senior Android developer and architecture lead. Responsible for designing scalable component structures, guiding technical decisions, mentoring squads, and ensuring high standards of quality, maintainability, and security. Banco Sabadell – Architecture Lead (Hybrid Android + Web app) - Acted as the technical and architectural lead for the mobile hybrid app (Android container with WebView-based content). - Designed and maintained shared architecture components used across multiple teams, setting standards for module interaction, data flow, and dependency structure. - Led the migration of legacy elements to modern modular layers, ensuring forward compatibility and reduced technical debt. - Implemented custom Gradle scripts for secure pre-processing of APK/AAB builds. - Delivered architecture documentation, held code reviews, and onboarded new developers in collaboration with the mobile platform team. - Promoted the use of Domain-Driven Design, SOLID principles, and testing practices across squads. Stack: Java, Kotlin, Android SDK, WebView, Gradle, JUnit, SonarQube. Senior Android Developer (Customer Profile vertical – Santander USA) - Developed country-specific features for the “Customer Profile” module of the OpenBank mobile app using Kotlin and Clean Architecture. - Collaborated with product and design to enforce accessibility-compliant interfaces (WCAG), modular UI design, and data validation layers. - Used MVVM, Koin, Jetpack components, and DataBinding to ensure maintainable and testable code. - Participated in sprint planning, code reviews, and CI/CD setup via Bitrise, Sonar, and Jira. Stack: Kotlin, MVVM, Koin, DataBinding, Jetpack, Bitrise, SonarQube, Jira.

Android development for Bitnovo cryptocurrency wallet and debit card apps: - Designed and built a wallet app from scratch using Kotlin, RxJava, MVVM, Realm, and Room. - Integrated cryptocurrency networks and blockchain APIs. - Applied Clean Architecture, Firebase, CI/CD with Jenkins and GitLab.

Developed native and hybrid mobile apps for major clients in finance, public administration, and energy sectors: - Endesa Clientes (Android native): implemented complex data visualizations and UI performance improvements. - Wizink (Android native): led development of new features and bug fixes, acted as technical owner. - Renfe Maquinistas, Muface, Hacienda: delivered hybrid apps using Ionic, Cordova, and PhoneGap, targeting both Android and iOS. - Collaborated with BI and Big Data teams, promoting scalable mobile-first solutions.

Joined the R&D department to build Smart City solutions: - Developed Android apps using Material Design, Retrofit, Google Maps, Twitter API. - Built and integrated RESTful APIs with Node.js and MongoDB.

Developed custom web applications using ASP.NET: - Used C#, LINQ, SQL Server 2012, Bootstrap, jQuery, and Reporting Services. - Introduced MVC 5 architecture to improve software structure. - Built management and data visualization modules for quality control clients.