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Rocio Sieiro Alfonsin is an experienced Android developer currently working at Grupo Oesía since March 2023. Prior roles include a position as an engineer and research engineer at Gradiant from August 2021 to December 2022 and everis from January 2019 to July 2021, with earlier experience as an intern at everis from October 2017 to November 2018. Expertise includes the development of Android applications using Kotlin and Java within MVVM and MVP architectures, alongside proficiency in Agile methodologies and tools such as Confluence and Jira. Rocio holds a degree in Audiovisual Systems Engineering from Universidad Carlos III de Madrid and a master's degree in Computational Engineering and Mathematics from Universitat Oberta de Catalunya. Additionally, Rocio participated in an international exchange program at the Federal University of Rio Grande do Sul between 2016 and 2017.