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Francisco RayaFR

Francisco Raya

Senior Android Developer (Kotlin)

€305/day
1 project
Madrid, ES
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Francisco

Technical Engineer in Systems Informatics (University of Córdoba) and Master's Degree in Informatics Applied to Mobile Telecommunications (University of Málaga).

Passionate about mobile technology, my career has focused on Android application development (over 12 years of experience), using both Kotlin (for the last five years) and Java. To a lesser extent, I also have experience developing iOS apps, specifically with Swift. Several applications in different markets, exceeding millions of users and up to 100,000 daily active users.

Since 2012, initially in my free time, and later full-time, I have focused on publishing Android applications on Google Play (Applications published with +5,000,000 downloads). All this, combined with various jobs as a Senior Android Developer in different companies, as well as managing and developing custom projects as a Freelancer. I currently hold the position of Android developer at Airtouch New Media.

Working as a freelancer has allowed me to develop my other great passions: economics, business administration, and entrepreneurship. I have been able to launch my own company, with multiple investments (management of tourist apartments with Airbnb and Booking). I also have another company with partners and have participated in the launch of different startups, even as an investor in some companies.

Among my main skills, I would highlight Android development with Kotlin, Google Play market research, mobile application monetization, and its positioning through ASO. As part of the various projects/apps launched, I have developed custom backends using languages like Node.js or Python. I also have extensive experience as a project manager applying agile methodologies like Scrum.
  • Spanish

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Mobile One2One, S.L.
    Malt logoOn Malt
    Kotlin Multiplatform Developer
    July 2025 - July 2025 (1 month)
    Madrid, España
    Development of a desktop application with support for Windows, Linux, and macOS, using Kotlin Multiplatform.
    Kotlin Multiplatform Java Git Jetpack Compose Compose
  • BairesDev
    Android Senior Developer
    FASHION AND COSMETICS
    January 2024 - December 2024 (11 months)
    Madrid, Spain
    Senior Android Developer working for Inditex on internal projects for sample management, new developments, designs, etc.
    Native Android development with modular development, applying Clean Code, MVI architecture with Compose.
    Clean Architecture MVI Agile Methodology Kotlin Android
  • Airtouch New Media
    Android Senior Developer
    March 2022 - Today (4 years and 3 months)
    Madrid, Spain
    Part of the company's native mobile development team, participating in product development, specifically in the various Android apps (Burger King, Popeyes, eeetwell, and Renault comedor Refactory). International team, so we use English as the official company language of communication.

Reviews

5.0

Out of 1 rating

A

Arantxa

Mobile One2One, S.L.

Several weeks project

-

Reviewed on 7/24/2025

We had the opportunity to work with Francisco Raya on a punctual basis, on an Android project, and the experience was extremely positive. From the beginning, he demonstrated a high level of professionalism, commitment, and proactivity. Furthermore, I would highlight his ability to quickly integrate into the team, understand technical requirements, and provide efficient solutions. We would certainly recommend Francisco as a professional and would work with him again if the opportunity arose.

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Education

  • Master's Degree in Informatics Applied to Mobile Telecommunications, J2EE, J2ME, Android, Application Servers, XHTML, Databases, Development Methodologies, J2EE, J2ME, Android, Application Servers, XHTML, Databases, Development Methodologies
    University of Málaga
    2012
    Máster en Informática Aplicada a las Telecomunicaciones Móviles, J2EE, J2ME, Android, Servidores de aplicaciones, XHTML, Bases de Datos, Metodologías de desarrollo, J2EE, J2ME, Android, Servidores de aplicaciones, XHTML, Bases de Datos, Metodologías de des
  • Technical Engineering in Systems Informatics, Software Engineering, IT Projects, Java, C, C++, QT, OpenGL, SQL, Oracle, Software Engineering, IT Projects, Java, C, C++, QT, OpenGL, SQL, Oracle
    University of Córdoba
    2011
    Ingeniería Técnica Informática de Sistemas, Ingeniería del Software, Proyectos informaticos, Java, C, C++, QT, openGL, SQL, Oracle, Ingeniería del Software, Proyectos informaticos, Java, C, C++, QT, openGL, SQL, Oracle

Skill set

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