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Malt Strategy
Youssef El Otmany El M.YE

Youssef El Otmany El M.

Senior Mobile Engineer, MSc

€400/day
Reus, ES
8-15 years
Android
Flutter
iOS
UX Design
Kotlin

Average response time: 1 hour

About Youssef

Senior Mobile Engineer with 8+ years building high-performance applications in native Android, native iOS and Flutter. Contributed to enterprise apps with 10M+ downloads and 1M+ active users across different industries. Built e-health and e-commerce apps from scratch, through a robust process of architecture, collaboration in UX/UI design, development, testing, and release to Google Play and App Store.
E-commerce
Health and Wellness
Software Publishing
Catering
Retail (Small Business)

  • Spanish

    Native or bilingual

  • English

    Fluent

  • Catalan

    Native or bilingual

  • French

    Fluent

  • Arabic

    Native or bilingual

Can work on-site
Reus (up to 50km)

Experience

  • Freelance
    Senior Mobile Engineer
    SOFTWARE PUBLISHING
    March 2021 - Today (5 years and 4 months)
    Reus, Spain
    • Delivered 10 mobile applications, leading projects end-to-end from ideation to production release across native Android, native iOS, and Flutter.
    • Designed and built a health-tech digital intervention system for pediatric chronic pain, including real-time synchronized apps for patients and caregivers, co-designed with clinicians and users within a clinical research context.
    • Developed an e-commerce Software Product Line (SPL), enabling quick delivery of 6 white-label apps published on Google Play and App Store.
    • Engineered scalable architectures with real-time data synchronization, focusing on maintainability, testability, and long-term evolution.
    • Collaborated with researchers, clients, and designers to define requirements, iterate on UX/UI, and validate solutions with end users.
    • Managed the full app release lifecycle across Android and iOS, including testing, store compliance, and publication via Google Play Console and App Store Connect.
    • Technical Stack: Android (Kotlin, Jetpack Compose, MVVM, Clean Architecture, Coroutines, Flow, Hilt, Retrofit, Room, Firebase), iOS (Swift, SwiftUI), Flutter (Dart), Accessibility, Push notifications, Jira, REST APIs, CI/CD, Git, scalable architectures & real-time sync.
    Android Flutter iOS UX Writing Kotlin
  • Zinio
    SENIOR ANDROID ENGINEER
    PRESS AND MEDIA
    April 2022 - July 2024 (2 years and 3 months)
    Barcelona, Spain
    • Developed and maintained Android applications for mobile and Android TV platforms, serving millions of daily users in the digital publishing industry.
    • Led key technical initiatives, including migration to Jetpack Compose, performance optimization, and architectural improvements, reducing app startup time by over 25%.
    • Designed and implemented scalable architectures using Clean Architecture and MVVM, improving maintainability across a large codebase.
    • Established a comprehensive testing strategy (unit and UI tests) to ensure high code quality and reliability.
    • Managed and evolved shared internal libraries across multiple projects, reducing duplication and improving consistency.
    • Collaborated closely with Product Owners and UX/UI teams to define, prioritize, and deliver high-impact features.
    • Updated CI/CD pipelines and release scripts to comply with new Google Play requirements, ensuring uninterrupted app releases
    • Technical Stack: Kotlin, Jetpack Compose, Coroutines, Hilt, Java, RxJava, Media3, Python, CI/CD.
    Android SDK Jetpack Compose Android Jetpack Firebase Android TV
  • Geoactio
    SENIOR MOBILE ENGINEER
    December 2021 - February 2022 (2 months)
    Designed and implemented a modular mobile architecture as a reusable SDK, improving scalability and consistency across applications. Ensured high code quality through testing, code reviews, and collaboration with cross-functional teams.
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Education

  • MASTER OF SCIENCE
    UOC
    2021
    MASTER OF SCIENCE
  • COMPUTER ENGINEERING, COMPUTER SCIENCE.
    URV
    2018
    COMPUTER ENGINEERING, COMPUTER SCIENCE.

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