Available to hire
I’m a hands-on Android engineer and team lead with strong experience building and maintaining Android (Java/Kotlin) and cross-platform apps with Kotlin Multiplatform (KMP), plus work across UI frameworks like Angular and Capacitor. I enjoy clean, solid architecture and I’m comfortable going end-to-end—from feature development and refactoring to integrations (e.g., Firebase), API work (Retrofit, flows/coroutines), and test automation.
Over the years I’ve contributed to multiple products, from internal banking and government apps to consumer restaurant ordering and night-life apps. I work with modern Android tooling (Jetpack Compose, MVVM, Hilt, Gradle, coroutines/flows), write reliable unit tests (JUnit, Mokka, etc.), and support releases through debugging, performance/scalability improvements, and secure dependency maintenance. I also value collaboration with product owners and daily communication to keep delivery on track.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
Work Experience
Android developer
September 1, 2023 - March 1, 2024Worked on an open-distribution base project focused on launching automated processes after challenge completion. Contributed to governance documentation, implemented clean architecture with MVVM and Hilt, wrote tests with Moki to, and added robust error handling with a custom dispatcher/handler class. Built custom components across the project.
Android - Java Kotlin Multiplatform (KMP) developer
September 1, 2023 - March 1, 2024Defined and built zero-to-first-version development scopes with clean architecture, MVVM and state-oriented patterns. Implemented payments in-app functionality using a custom library (tap-to-pay), prepared printer connections, and added QR management flows. Continued refactoring and architecture improvements, including creating a custom hardware communication plugin for Capacitor supporting Bluetooth, RFID and printers.
Android Developer (base project + features) at SIGPA (open distribution closed / base project)
September 1, 2023 - March 1, 2024Built and maintained a product enabling launch of processing steps after users complete invited challenges. Contributions included documentation for governance, clean architecture using MVVM and Hilt, and test writing with tools such as Mokkito. Implemented error handling with a custom handler class and developed customized components for the whole project.
Android developer
July 1, 2023 - March 1, 2024Developed a project from scratch with MVVM and Hilt, created custom components using XML, implemented notification service-related functionality, and wrote tests with MockK. Uploaded builds to the Play Store and maintained daily communication with the product owner.
Android developer
July 1, 2023 - March 1, 2024Built daily-use employee applications using Android with Jetpack Compose; set up MVVM + Hilt foundation, created custom components, and refactored XML views into Compose equivalents. Implemented unit testing using Moki to.
Android Engineer (Multiple products) at Fourvenues / External clients
July 1, 2023 - March 1, 2024Worked on several app lines: SIGPA (governance/invite-challenges processing), RU DO App (employee daily-use app) and Loteria Laof ia/castillo (notification service integration and XML/component creation). Focused on clean architecture with MVVM and Hilt, refactoring Compose UI using safer component patterns, implementing tests with Mockk/Mockito, and preparing store releases. Also supported legacy Android/third-party dependency fixes, crash debugging, and CI/CD code-review management via VPN and Jenkins cloud.
Android Developer at LOTERIA CASTILLO
July 1, 2023 - March 1, 2024Developed Android app from scratch. Implemented clean architecture with MVVM and Hilt. Developed custom components for the whole project using XML. Created notification service and wrote tests with MockK. Prepared upload and store publishing steps; maintained daily contact with the product owner.
Android Developer at RUDO APP (daily use app)
July 1, 2023 - March 1, 2024Prepared clean architecture base using MVVM and Hilt/Compose setup. Built custom components across the app and replaced XML views with Compose equivalents. Wrote tests using Mokkito. Managed Play Store publishing tasks.
Android Engineer - Team Lead at Fourvenues Inc
June 10, 2023 - June 18, 2026Developed and maintained Android and Angular/Capacitor applications. Built clean project architecture and implemented reusable/custom components. Worked across Android (Java/Kotlin) and cross-platform stacks including Jetpack Compose and Capacitor, using Retrofit, Coroutines, and Flows. Integrated backend services with Firebase and performed unit testing with JUnit using Mokka/Mokit o. Led refactors to improve maintainability and architecture; created device communication plugins for Bluetooth/RFID/printers. Contributed to multiple app products including QR management/payment flows and a venue-focused app for nightclubs/festivals.
Android Engineer / Team Lead at Fourveunes Inc
June 10, 2023 - June 18, 2026Developed and maintained Android and Angular/CAPACITOR multi-platform applications. Built and maintained a clean, solid architecture base, created custom reusable components, and implemented new scoped features. Tech stack included Kotlin/Java/TypeScript, Jetpack Compose and Kotlin Multiplatform (KMP) where applicable, plus Retrofit, coroutines, and flows. Implemented service integrations with Firebase. Performed testing with JUnit and mocking tools (Mokka/Mokito). Used Gradle and Cloud Code as an AI assistant interface; handled UI design/material design; created and maintained service layers and network calls, focusing on scalability and maintainability.
Android developer
June 1, 2023 - August 31, 2023Refactored and maintained existing Android apps, fixed crashes, and handled card-reader dependency issues. Implemented new API calls to support app versioning while keeping backward compatibility, updated views/data flows, and ensured scalability through clean and solid participation principles.
Android Developer at Hundred Burgers
June 1, 2023 - August 1, 2023Developed Android app for restaurant ordering and delivery, including reservations management. Wrote tests for payment data flows and implemented API changes for new API versions while preserving backward compatibility with older app versions, including new views and updated data flows following clean/solid principles.
Android Developer at BBVA (internal distribution)
June 1, 2023 - PresentDeveloped native Android app for bank employees (internal distribution). Fixed and compiled an outdated card reader dependency not supported by the creator since 2018. Supported release and maintenance tasks for internal employees.
Android / Angular (Team Lead)
June 1, 2023 - November 1, 2025Led and delivered multiple mobile app products and integrations. Included migrations (ionic 3 to ionic 6), dependency updates to address vulnerabilities, and play store publishing workflows. Worked on several applications for internal/external distribution, crash fixing, and code review management across environments using Jenkins Cloud. Implemented VPN and automated checks to meet submission requirements.
Android developer
March 1, 2023 - PresentBuilt and maintained a government app served for public transport line users (Play Store/EMTV). Used VPN and Jenkins cloud dashboards to manage code reviews, verify tests, meet minimum requirements before opening pull requests, and debug reported crashes.
Android - Angular - Capacitor Functions Developer and Maintenance at Fourvenues
March 1, 2023 - November 1, 2025Developed and maintained Android and Angular/Capacitor applications using Java, Kotlin, and TypeScript. Implemented API calls with Retrofit, Coroutines, and Flows. Designed and maintained material-based UI/UX and service integrations with Firebase. Wrote unit tests with JUnit using Mokka/Mokit o and supported payments/payment-data flows while keeping compatibility with multiple versions.
Android Developer at EMT Valencia
January 1, 2023 - PresentWorked on government/public transport mobile application for city users. Debugged and fixed reported crashes. Managed code reviews and testing gates across environments using Jenkins Cloud; validated tests and minimum requirements before submitting pull requests to the Play Store.
Education
at G.F.G.S Multiplatform Apps Development Center de Formacion Profesional
January 1, 2021 - January 1, 2023 at High School Jerusalem School
January 1, 2013 - January 1, 2016Master's / Professional Training (Multiplatform Apps Development) at C.F.G.S Multiplatform Apps Development Centre d e Formació Profesional
January 1, 2021 - January 1, 2023Professional training (multiplatform apps development) at EDU.C.F.G.S Multiplatform Apps Development Center de Formació Professional
January 11, 2030 - September 29, 2026High school education at Jerusalem School
January 1, 2013 - September 29, 2026Qualifications
Industry Experience
Software & Internet, Education, Financial Services, Government, Retail, Media & Entertainment, Travel & Hospitality
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Hire a Web Developer
We have the best web developer experts on Twine. Hire a web developer in Valencia today.