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Mariem MoumniMM

Mariem Moumni

Senior Web / Mobile Developer

€550/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Mariem

Senior Software Engineer – Mobile & Web Developmentwith over5 years of experiencein designing, developing, and evolving high-performing, robust, and user-centric digital solutions. I work across the entire product lifecycle, from technical design to production deployment, on both mobile applications and web platforms.

I have contributed to the development of high-traffic digital products, particularly in the retail, e-commerce, and travel sectors, with a particular focus on performance, quality, stability, and user experience.

Accustomed to Agile/Scrum environments, I collaborate closely with Product, UX/UI, Back-end, and business teams to design and deliver reliable, scalable solutions aligned with business objectives. I also work on service integration, omnichannel journeys, functional optimizations, and continuous improvement of digital products.

Results and impact-oriented, I bring real added value through my ability to understand business challenges, propose pragmatic solutions, and deliver quality products. I am looking for assignments that allow me to design, evolve, and optimize Mobile & Web digital applications and platforms, while actively contributing to technical decisions and project success.
  • French

    Native or bilingual

  • English

    Native or bilingual

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

Experience

  • Fnac Darty
    Senior Android/KMP Developer
    E-COMMERCE
    March 2023 - April 2026 (3 years and 1 month)
    Paris, France
    • Development and evolution of e-commerce consumer applications with Kotlin and Jetpack Compose.
    • Participation in the catalog redesign (navigation, search/filtering, performance, UX) and optimization of loading times.
    • Implementation of an offline mode: local persistence (Room), cache, management of synchronization and network error tolerance.
    • Integration of back-end services via Retrofit, asynchronous processing with Coroutines/Flow, state management, and pagination.
    • Implementation/strengthening of MVVM architecture (Clean Architecture principles), separation of responsibilities, and improvement of testability.
    • Quality and delivery: code reviews, bug fixing, POCs, implementation of tests (unit/UI depending on scope), adherence to Scrum best practices and rituals.
    • Production monitoring: monitoring, analysis, and reduction of crashes via Firebase Crashlytics, crash-free > 99%, preparation of releases and deployments to stores.
    • WebView integration and hybrid journeys, management of app ↔ web interactions (navigation, deep links, callbacks).
    KMM XML MVVM Java Android
  • Wenext /accor hotel
    Full-Stack Developer
    January 2021 - February 2023 (2 years and 1 month)
    Paris, France
    • Mobile & Web Expertise
    Design and development of high-traffic mobile applications and web platforms.
    Development of new features focused on user experience and business needs.
    Creation and optimization of omnichannel journeys (mobile, web, and back-end services).
    Integration of REST services and third-party solutions.
    Optimization of application performance, stability, and quality.
    Participation in the development and evolution of Accor's digital solutions aimed at improving customer experience across mobile and web channels.
    Development of features related to booking, customer accounts, loyalty programs, and services offered to travelers.
    Contribution to the implementation of fluid and consistent user journeys between mobile applications and web platforms.
    Integration of business services and APIs to ensure a high-performing and reliable digital experience.
    Participation in improving application performance, stability, and quality.
    Jetpack Compose Kotlin MVVM Java XML

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Education

  • Engineering Degree
    Esprit
    2020
    Diplôme d'ingénieur

Skill set

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