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David Collados BlancoDC

David Collados Blanco

Mobile & Backend Developer

€200/day
Avilés, ES
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About David

I am amobiledeveloper specializing inFlutter (Android/iOS)andnative Androidwith **Kotlin/Java**. I design and build modern mobile applications, focusing on good performance, a polished user experience, and maintainable code.

I have experience connecting apps with **REST APIs (Java / Spring Boot)**, I use **Firebase**, and I work with best practices like **Clean Architecture**, **MVVM**, and version control with **Git**.

I can help you to:

  • Create an MVP from scratch.
  • Develop new features in an existing app.
  • Improve performance, code structure, or user experience.

I like to communicate clearly, plan work by milestones, and always deliver with quality and basic tests. I am looking for collaborations where I can add value from day one and continue growing with the team or client.
  • Spanish

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • SM - Proyecto colaborativo
    Co-founder and Full-Stack Developer
    SOFTWARE PUBLISHING
    August 2025 - Today (10 months)
    Complete development of a sports social application as a collaborative project.
    Responsible for the backend withSpring Bootand the mobile app with **Flutter**, applying agile methodologies and good development practices.
    Currently in active development phase with a view to an initial launch.
    Flutter Spring boot Dart Java API
  • S2F - Proyecto personal
    Founder and Developer
    SOFTWARE PUBLISHING
    June 2025 - Today (1 year)
    Personal project based on my Final Degree Project.
    Development of a fitness app withFlutterand **Firebase**, managing the entire product lifecycle: design, development, integration, and deployment.
    Flutter Dart Firebase Git Clean Architecture
  • Triplo Mobile S.L.
    Intern Developer
    SOFTWARE PUBLISHING
    April 2025 - June 2025 (2 months)
    Practical learning in mobile environments with **Flutter**, **Dart**, **Kotlin**, and **Firebase**. Participation in internal tasks, version control with **GitLab**, and familiarization with real workflows in Flutter projects.
    Flutter Dart Kotlin Firebase Git

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Education

  • Higher Vocational Training Cycle in Cross-Platform Application Development
    Tunivers Formación
    2025
    Ciclo Formativo Grado Superior Desarrollo de Aplicaciones Multiplataforma

Certifications

  • Oxford Test of English (B2 Level)
    University of Oxford
    2024
    English

Skill set

Categories