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Serhii Tsykalovskyi is a skilled software developer with extensive experience in PHP development and backend architecture. Currently serving as a Back End Developer at Paysera since May 2023, Serhii has previously worked at Avenga Ukraine as a PHP Software Engineer, focusing on application security and feature development. Prior roles include PHP Backend Developer at INAP, where responsibilities included the development of microservices and project dockerization, and PHP Developer at Домен-Хостинг, honing skills in API implementation and unit testing. Early experience includes PHP Development at Io Tahoe and freelance work, which involved maintenance, debugging, and technical support. Serhii holds a Specialist degree in Military Radioelectronics Intelligence from Zhitomir Military Institute of Radioelectronics and a Bachelor’s degree in Radioelectronics from National Aviation University.