Freelancer profile translated to English.
Back to original languageAbout David
I am a Full-Stack developer specialized in mobile apps and backend.
Mobile: Android with Kotlin/Java, Jetpack Compose, and cross-platform apps with Kotlin Multiplatform (KMP).
Backend: API design, integrations, and automation / Java Spring Boot, Oracle
Data: PostgreSQL, scraping/ETL, and batch processes (Docker).
Applied AI: I integrate ML models into real products (prediction/classification, metrics, and production deployment).
Web Frontend: React when the project requires dashboards or web interfaces.
I work with a focus on results: clear deliveries, maintainable code, and direct communication. If you need an app (Android or cross-platform) connected to a robust API, or a useful AI integration into your product, I'm a good fit.
Spanish
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- EYSAAndroid DeveloperJuly 2023 - Today (2 years and 11 months)Valladolid, Spain• ● Development of a mobile application for Android, using Java for maintenance and Kotlin for new developments.• ● Use of Jetpack compose, ViewBinding, and Product Flavors.• ● Use of libraries such as retrofit, okhttp, glide, google maps, NFC, material3, ViewModel, Lifecycle.• ● Testing with Espresso and JUnit.• ● Use of Clean Architecture, MVVM, and SOLID principles.• ● DI implementation with Hilt.• ● Integration of mobile payments with libraries like Redsys and Stripe.• ● Cloud management with Azure.• ● Publishing applications and updates on the Play Store.• ● Version control and branch management with Git.• ● Firebase (Analytics, Crashlytics, Cloud Messaging).
- AstibotAndroid DeveloperJanuary 2022 - July 2023 (1 year and 6 months)Valladolid, Spain• ● Software development for public and private organizations.• ● Backend development with Java and Spring boot.• ● Front-end development with React, HTML, CSS.• ● Mobile development for Android.
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Education
- Cross-platform application developmentIES Julián Marías2022
- Specialization in Artificial Intelligence and Big DataILERNA2025