Freelancer profile translated to English.

Description

Freelance Android and Flutter Developer with over 11 years of experience in the comprehensive development of mobile and web solutions. Throughout my career, I have led high-impact projects, from real-time alert applications to mobile payments and due diligence processes, to customized portals for optimizing processes in sectors as diverse as air traffic control, real estate, and security. My approach is based on adopting modern technologies (Kotlin, Jetpack Compose, Flutter, Angular, Node) and agile methodologies, which allows me to guarantee secure, efficient, and high-quality applications. My passion for innovation and continuous improvement drives me to transform the user experience and bring tangible value to each project.

Languages

Spanish
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

wheelhub
Freelance Mobile & Full Stack Developer
July 2025 - Today (11 months)
• Solution Development: Native Android apps with Kotlin, Jetpack Compose, Hilt, Firebase, Stripe Connect, and shared component SDK via GitHub Packages with Clean Architecture. Frontend with Nuxt 3/4, Vue 3, Tailwind CSS, and Tiptap on reusable layers (Nuxt Layers) with atomic design. Backend with NestJS, TypeORM, and integration with AEAT (VeriFactu) using digital signature, SOAP with mTLS, and tax XML. Multi-language static sites with Hugo.
• Architecture and Patterns: MVVM + Clean Architecture in Android, dynamic forms with validation, serverless architecture with triggers and PubSub, and electronic invoicing with automatic rollback upon AEAT rejection.
• Testing: Unit tests with Vitest and Jest, E2E with Playwright, and linting with ESLint + Husky.
• Featured Projects:
o GoBarber: Management platform for barbershops. Two native Android apps (Admin and Client) with Stripe Connect payments, shared SDK with booking flow, scheduling, services with dynamic pricing, and statistics. Serverless backend with Cloud Functions for appointments, waitlist, and notifications.
o Prilux: Industrial configuration portal with Nuxt 3/4, dynamic forms, authentication, internationalization, and a design system of reusable components.
o Apit: Platform for tourist guide association. Implementation of VeriFactu (AEAT electronic invoicing) in NestJS and Nuxt: digital signature, tax XML, SOAP with mTLS, self-invoices, amendments, and verifiable QR code.
o BBVA-Wipop: Bilingual documentation portal for the Wipöp by BBVA payment API, built with Hugo.
Jetpack Compose Firebase NestJs Kotlin Android
Experis
Freelance Android Developer
July 2025 - Today (11 months)
• Solution Development: Design, architecture, and development of a native Android app using Kotlin, Jetpack Compose, Koin (DI), Retrofit/OkHttp, Firebase Crashlytics, and FCM. Clean Architecture with layer separation (domain, data, presentation), UseCases, Repositories, and ViewModels with StateFlow.
• Key Features: Authentication with JWT and automatic refresh token via OkHttp interceptor, biometric authentication (fingerprint and facial recognition), MFA, role system, push notifications with Firebase Cloud Messaging, and bidirectional WebView-native bridge for integration with the client's web portal.
• Multi-environment Configuration: Product flavors for development, pre-production, and production with independent signing configs and API URLs per environment.
• Featured Project:
o Virtual Office (Ullastres): Native Android app as the mobile channel for the Ullastres client portal. Bidirectional communication between WebView and native layer for functionalities such as PDF document download, phone calls, map opening, WhatsApp sending, image and document selection, and requesting a Google Play review.
Kotlin Android Clean Architecture MVVM Jetpack Compose
Gruconsa
Full Stack Developer
CIVIL ENGINEERING
February 2024 - Today (2 years and 4 months)
-Communication and Conceptualization: Direct coordination with the client for requirements gathering, proposal development, and continuous communication, ensuring alignment of expectations and implementation success.
-Integral Development: Design and creation of a web solution and hybrid application using Flutter (Client/Admin Portal), Angular (Landing Page), and Node.js (Backend), aimed at the real estate developer sector to streamline sales, construction, invoicing, and communication processes.
-Maintenance and Evolution: Architecture, UI design, database design, integration of Cloud Functions and Push Notifications, applying evolutionary and corrective improvements to ensure efficiency and sustainability.

Key Achievements:
- Development of an integral web portal: Creation of a cross-platform solution where clients access a personalized portal to configure their homes without traveling. Simultaneously, administrators are redirected to a specific portal to manage promotions, configurations, and other parameters, optimizing the user experience and centralizing administration.
- Business Impact: Optimization of the customer experience and improvement in operational efficiency, reducing management times and centralizing key information for decision-making.
Flutter Node.js Angular Typescript Firebase

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Higher Vocational Training Cycle in Cross-Platform Application Development
Universidad Europea de Madrid (UEM)
2014
Technical Engineering in Management Informatics
Universidad Europea de Madrid (UEM)
2003

Patricia Alonso Gallego

Senior Android Developer

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