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Rubén ExpósitoRE

Rubén Expósito

Mobile Developer (Android, iOS, Kotlin, Swift)

€400/day
Barcelona, ES
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Rubén

With over 7 years of professional experience, I have been working in various types of companies, mostly consultancies. This has led me to work with different clients and tackle various projects with quite different approaches, from real-time messaging applications, live music streaming platforms, to applications with payment integrations like Stripe or Google Pay.

Among some of the clients/projects I have worked on are RCD Espanyol, B4Work, Zyncro, and Bacco, and in some of these projects, I have served as both a programmer and a technical lead.

As a freelancer, I look for projects where I can not only develop but also help the client in creating their idea and advise them on both the technical and product aspects.

To carry out my projects, I use Kotlin on Android or Swift on iOS. I always try to integrate a style guide and customize the app from the beginning of the project, giving it that unique touch to the product. I have integrated a lot of libraries, mentioning some of them: Firebase, ReactiveX, Coroutines, Realm, Room, Stripe, SocketIO, Lottie, Alamofire, etc...

If the application requires a backend, I would consider an mBaaS like Firebase, Back4App, Parse... for MVPs or build a traditional server with Spring Boot (Kotlin) or Node.JS if the product requires more complexity, connected to a MySQL (SQL) or MongoDB (noSQL).

Although it is not my specialty, I can design application components using Figma.
  • Spanish

    Native or bilingual

  • English

    Fluent

  • Portuguese

    Basic

  • Catalan

    Basic

Remote only
Primarily works remotely

Experience

  • B4Work
    Lead Android Developer
    DIGITAL AND IT
    November 2020 - Today (5 years and 7 months)
    Barcelona, Spain
    - Platform for job searching aimed at companies looking for personnel.
    - Android Application (Kotlin)
    - Technologies used: Coroutines, Realm, Design System, Retrofit, etc...
    - Working for Apiumhub.
    Android Kotlin Agile Methodology Coroutines Realm Firebase
  • Fitcash
    Mobile Developer
    SPORTS
    January 2020 - October 2020 (10 months)
    Barcelona, Spain
    - Application to encourage users to participate in step-tracking or weight-loss challenges.
    - Android (Kotlin) and iOS (Swift) Application
    - Technologies used: Coroutines, Google Pay, Stripe, Google Fit, Health Kit, etc...
    - Working for Apiumhub.
    Android Kotlin iOS Swift Stripe Google Pay Google Fit
  • Ayoba
    iOS Developer
    TELECOMMUNICATIONS
    July 2019 - December 2019 (5 months)
    Barcelona, Spain
    - Platform for user communication via chat or video calls, targeted at Africa, similar to WhatsApp or Telegram.
    - iOS (Swift) Application.
    - Technologies used: RxSwift, Core Data, Moya, XMPP, etc...
    - Working for Apiumhub.
    iOS Swift XMPP RxSwift Moya

Recommendations

Guillermo PortasGP
Javier LópezJL
Guillermo Portas and 1 other person have recommended Rubén

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Education

  • Cross-Platform Application Development
    IES Castelar
    2015

Skill set

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