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Antonio MartínezAM

Antonio Martínez

Senior Android & iOS Developer / Kotlin, KMP

€250/day
Alicante, ES
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Antonio

With over 15 years of experience in the mobile ecosystem, my profile is purely technical. I specialize in designing and programming technological assets where stability and performance are critical. I have developed highly complex projects for institutions such as Samsung Spain, the Teatro Real, and the Prado Museum, environments that demand impeccable technical execution and robust architecture.

Technical Domain and Stack

My main focus is native development and cutting-edge architecture:

Native Android: Expert in Kotlin and Java. Advanced knowledge of lifecycle, memory management, Coroutines, Flow, and reactive architectures. Dependency injection with Dagger/Hilt and Firebase stack.

Advanced UI and Graphics: Specialist in Jetpack Compose for fluid interfaces. Experience in complex visual challenges using OpenGL and Shaders for 3D visualization and high-performance graphics.

Multiplatform Architecture: Implementation of Kotlin Multiplatform (KMP) and Compose Multiplatform. Developing shared business logic between iOS and Android, ensuring native performance and drastically reducing technical debt and maintenance costs.

Technical Productivity: Integration of generative AI (Cursor, LLMs) to optimize code refactoring, accelerate deliveries, and ensure rigorous test coverage.

Contribution to the Project

My value lies in technical solvency. I understand software as a profitability engine; therefore, my code decisions are aligned with scalability and security. I have worked for global corporations like Gonvarri and various public organizations, translating complex business requirements into institutional-grade architectures.

If you are looking for a senior profile with the ability to delve into code details, resolve complex technical blockers, and ensure high-quality execution in demanding environments, we can discuss your project.
  • Spanish

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • AMDev
    Senior Android Expert | Native Android (Kotlin/Java) & Multiplatform (iOS/Android)
    March 2026 - Today (5 months)
    Alicante, Spain
    Expert in mobile software engineering focused on high-performance architectures (Native & Multiplatform with KMP and Flutter). Capable of leading the complete lifecycle of technological assets, integrating AI and advanced graphics. My commitment is technical excellence: scalable, efficient, and user-centered solutions for leading brands and global institutions.
    Flutter Android Kotlin Multiplatform Java Kotlin
  • Digital Nomad
    Senior Android Developer | Head of Android Area
    September 2015 - February 2026 (10 years and 5 months)
    Fully responsible for planning and delivering mobile applications, aligning business needs with technical development.
    Leading development teams to achieve critical milestones in large-scale projects.
  • Digital Nomad
    Android Developer
    June 2011 - September 2015 (4 years and 3 months)
    Design, creation, and maintenance of native applications for the Android operating system using Kotlin and Java.

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Education

  • Analyst and Programmer of Computer Applications
    Grupo ECC
    2002
    Estudios en Análisis y Desarrollo de aplicaciones informáticas. Programación en los lenguajes Java, Visual Basic, Visual C++, Basic, Cobol, C++, RPG. Desarrollo web en HTML, Javascript y diseño en Dreamweaver, Fireworks y Flash.

Certifications

  • Professional Certificate - Programmer of Computer Applications
    Regional Ministry of Employment of Castilla-La Mancha
    2000
    Visual Programming Languages (Microsoft) Object-Oriented Programming (OOP) Teamwork Business-Oriented Programming

Skill set

Categories