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Rayan Mestiri has a diverse and extensive work experience in software development.

Starting in 2014, they worked as an intern developer at grouek and later joined Supergazol as a front-end developer, where they implemented modules and optimized frameworks for clients like Louis Vuitton and Roger Vivier.

In 2016, Rayan worked as an iOS and NodeJS developer at Archigram on freelance projects. Rayan assessed customer requirements, developed a NodeJS/MongoDB server, and implemented various functionalities such as user management, video processing, payment processing, and messaging.

From 2016 to 2017, Rayan freelanced as an Android developer for Qanda.co, where they developed the Android version of the Qanda app, including features such as video streaming, deep-linking, and data management.

In 2017, Rayan joined Adresse Mac as a mobile app developer, before moving on to Olémains in 2018 as an iOS and Android developer. At Olémains, they helped launch the Olémains iOS and Android apps to the Italian market, refactored the apps for localization, and integrated new content and in-app purchases.

From 2018 to 2019, Rayan worked as an iOS developer at leboncoin Emploi Cadres (originally known as Kudoz), where they maintained and improved the app's code and architecture while collaborating with product teams and other developers to design innovative features.

Rayan also worked for leboncoin.fr from 2018 to 2020, initially as an iOS developer and later as an Android developer. As an iOS developer, they were part of a team of 20 developers and utilized code review driven development, multiple design patterns (MVVM, Coordinator, VIPER), and rigorous testing practices. As an Android developer, they contributed to a complete project, bringing their expertise in Kotlin and modern Android development to the team.

Since 2020, Rayan has been working as an iOS/Android developer at RATP Smart Systems, focusing on the Bonjour RATP mobile app with a significant user base. Rayan has experience in both iOS and Android codebases.

Rayan Mestiri began their education in 2012 at Université Paris 13, where they pursued a degree in DUT Services et Réseaux de Communication with a specialization in Internet et Multimédia. Rayan studied at this institution until 2014.

In the same year, 2014, Rayan Mestiri attended Gobelins l'école de l'image. Here, they completed a program in Multimedia Developer and Designer, focusing on Development and Programming. This period of study lasted for one year.