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Kostiantyn Ostafiichuk is an experienced QA Test Lead and QA Engineer at Software MacKiev, with a solid background in the Software Development Life Cycle and multitasking capabilities. Kostiantyn has freelanced in testing both iOS applications and web applications, demonstrating proficiency in writing test cases and bug reports. Prior roles include an SEO Specialist at Lustra-Style, where A/B testing and SEO strategy development were key responsibilities, and a Webmaster at Training Center "Cosmo-Trade," focusing on web design and content publishing. Kostiantyn began a career in customer support at Fozzy Group and technical support at National Aviation University, after obtaining a Master's degree in Electronics and Telecommunication from National Aviation University.