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Dušan Marsa has a diverse work experience in web and mobile application development. Dušan started their career in 2016 as a Freelance Web Developer. In 2017, they worked as a Javascript Full-stack Developer at Blue Sky Media, LLC and also had a short practice at the IT department of Yanfeng Automotive Interiors. In 2020, they were a Front-end TypeScript Developer at Trigama International, where they contributed to the development of an AI service dashboard using ReactJS, Redux, GraphQL, Apollo, and TypeScript. Dušan later joined Trigama International again in 2021 as a TypeScript Frontend Developer. Dušan founded AliUP in 2018, where they worked as a Co-Founder and Developer, focusing on web applications, multiplatform mobile applications, backend development, and project management using React.js, ReactNative, Node.js, GraphQL, REST, PostgreSQL, and Agile methodologies. Currently, they are working as a Senior Frontend Developer at ACTUM Digital.

Dušan Marsa completed their high school education from 2014 to 2018 at The Centre of Professional Training, where they graduated with a degree in Information Technology - Network Maintenance and Programming. Following that, they pursued a degree in Applied Informatics at the College of Polytechnics, Jihlava, from 2019 to 2022, earning the degree of "Bakalář (Bc.)".

In terms of additional certifications, Dušan obtained the MTCNA certification from MikroTik in June 2017. Dušan also acquired a certification in Application Development in the C# programming language, although the institution where they obtained this certification is not specified. Additionally, Dušan has obtained the European Computer Driving Licence (ECDL) which consists of 7 modules. The specific month and year of obtaining these certifications are not provided.