Ulises Balbuena

Android Developer (8+ years exp.). Jetpack Compose, reactive architectures, and app modernization. Expert in Banking and Social Media sectors. Focused on Clean Architecture and technical leadership (Scrum Master).

Senior Android Developer at ConsultR (2025-05 – Present)

• Refactoring: Reconstructed the notifications module using Jetpack Compose, optimizing state and visual consistency.
• Productivity: Developed Material 3 reusable UI libraries, reducing development cycles by 25%.
• Performance: Optimized Fanbase app using reactive streams (Flow) and Kotlin Coroutines.

Android Developer (Cajamar Bank) at Experis (2023-12 – 2025-01)

• Developed critical payment and billing flows under high-security banking standards using Java/MVP.
• Maintained business logic and collaborated within high-velocity Scrum squads.

Android Developer at ConsultR (2022-05 – 2023-10)

• Architecture Migration: Migrated the Fanbase social media app from MVP to MVVM, improving code maintainability and decreasing technical debt.
• Media Integration: Developed a music library integrated with external APIs to enable thematic song selection for video reels.

Android Developer & Scrum Master at Naranja X (2020-06 – 2022-05)

• Leadership: Served as Scrum Master and Dev during organizational transition after Banco Galicia acquisition.
• Impact: Redesigned Onboarding flow with biometrics, significantly increasing user conversion rates.

Android Developer at Coderio (2018-02 – 2020-06)

• Banco Santander: Implemented a contactless public transportation smartcard recharge workflow (SUBE system) using Java and MVC.
• Carrefour: Developed a financial management app from scratch using Kotlin and MVVM, integrating Navigation Components and Git-flow.
• Swiss Medical: Digitized healthcare ID cards using document scanning and facial recognition via device camera.