Our Team

Founder & CEO

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Vadym Sydorenko is the driving force behind SmartphoneKey, leveraging over two decades of experience in the tech and telecom industries. He started his journey as a tech-savvy student, installing internet access in dorms and quickly growing into leadership roles, including CEO of one of Ukraine’s largest ISPs. His passion for technology and problem-solving led him to co-found OMO Systems, where he developed IoT solutions tailored for internet providers.

With a vision to simplify smart access control, Vadym founded SmartphoneKey, focusing on innovative solutions that make property access easy and secure for everyone. He is dedicated to enhancing the quality of life through technology, bringing his expertise in IoT and smart home devices to the forefront of the Fourth Industrial Revolution.

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Marketing and Sales Director

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Maryna Voznesenska is an accomplished marketing professional with over two decades of experience leading marketing and sales teams across various industries. Known for her strategic vision and hands-on approach, she has successfully managed campaigns, developed market strategies, and driven sales growth in multiple roles, from telecom to retail. 

At SmartphoneKey, Maryna leads the marketing and sales efforts, focusing on brand development and market penetration. Her expertise in managing complex projects and her commitment to innovative marketing solutions help drive the company’s growth and success in the competitive smart home market.

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Technical Director

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With over 20 years of experience in software development, Alex Sydorenko is the driving force behind the technological vision at SmartphoneKey. His expertise spans Java development, software architecture, and leading complex tech projects for companies like Luxoft and EPAM Systems. Known for his problem-solving skills and innovative mindset, Alex has a track record of transforming challenges into cutting-edge solutions.

At SmartphoneKey, he focuses on building robust and scalable technologies that redefine access management, ensuring our products stay at the forefront of the IoT landscape.

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Operations Director

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Denys Merkulov has a strong background in managing operations in the telecom and tech industries. With years of experience in production and team leadership, he’s worked on projects from the ground up, setting up efficient production lines in markets like China and Ukraine. Denys focuses on making things run smoothly, whether it’s handling logistics, improving processes, or managing day-to-day operations.

At SmartphoneKey, he keeps everything moving behind the scenes—overseeing production, logistics, and support to ensure our products are top-notch and delivered efficiently. Denys is all about finding better ways to do things, making sure our operations stay solid as we grow.

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Financial and Legal Director

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Lana Ostapenko brings a wealth of expertise in finance and legal strategy to SmartphoneKey. With a strong background in financial management, compliance, and corporate governance, Lana plays a crucial role in ensuring the company’s financial health and legal integrity. She combines her analytical skills with a deep understanding of the legal landscape, making complex decisions that drive growth while maintaining compliance. 

At SmartphoneKey, Lana oversees all financial operations and legal matters, aligning our strategic goals with sound financial practices to support our ambitious vision for the future of access control.

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Digital Marketing Manager

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Eugenia Byshovets is a seasoned digital marketing professional who plays a pivotal role in shaping SmartphoneKey’s online presence. With a background in driving impactful marketing strategies across diverse industries, she brings a blend of creativity and data-driven insights to the team. Eugenia excels at crafting engaging digital campaigns that resonate with audiences, building brand awareness, and enhancing customer interactions.

At SmartphoneKey, Eugenia leads the charge in amplifying our brand’s voice online. She’s at the forefront of developing innovative content, managing digital channels, and ensuring our marketing efforts align with the company’s growth ambitions in the competitive access control landscape.

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CEO of Marketing Agency

42DM.net (USA)

Kate Vasylenko serves as an Advisor at SmartphoneKey, bringing over two decades of expertise in digital marketing and strategic growth. As the CEO and Founder of 42DM, a full-service B2B marketing agency, Kate has been instrumental in driving the global success of renowned brands like Payoneer, Microsoft, Visa, Samsung, and Coca-Cola. Her agency specializes in empowering tech companies with innovative go-to-market strategies, advanced MarTech & AI solutions, and scalable growth tactics.

In 2015, Kate founded 42DM to provide tech companies with tailored marketing strategies and a highly skilled team capable of navigating the challenges of the US and international markets. Throughout her career, she has supported over 100 B2B tech companies in North America and Europe, leveraging her expertise in demand generation, ABM, inbound marketing, and marketing operations. Her approach combines traditional consulting with cutting-edge marketing techniques to help businesses achieve significant milestones, including unicorn status, successful exits, and IPOs.

Recognized as a thought leader in the tech marketing space, Kate frequently speaks at major IT conferences and mentors startups, guiding them toward finding product-market fit and scaling globally. Her insights have been featured in Forbes and other leading publications, reflecting her commitment to fostering growth and innovation within the tech industry.

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CEO of Telecom Provider

cablenet.com.cy (Cyprus)

Ioannis Mavridis serves as an Advisor at SmartphoneKey, bringing a wealth of experience from the telecommunications sector. As the CEO of Cablenet, a leading telecom provider in Cyprus, Ioannis has been pivotal in advancing telecom infrastructure and driving innovation in the industry. His leadership has guided Cablenet through significant growth, establishing it as a top player in the market known for its high-quality services and technological advancements.

With a career spanning over two decades, Ioannis has been at the forefront of telecom technology, focusing on expanding connectivity solutions and enhancing customer experiences. His expertise includes strategic planning, market expansion, and implementing cutting-edge telecom solutions that meet evolving customer needs.

Ioannis is recognized for his strategic vision and dedication to improving telecommunications services. His insights and leadership continue to shape the future of connectivity in Cyprus and beyond.

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CEO of Telecom Provider

inalan.gr (Greece)

Kostiantyn Dolzhenko serves as an Advisor at SmartphoneKey, bringing a wealth of expertise from the telecom sector. As the CEO of Inalan, a prominent telecom provider in Greece, Kostiantyn has played a crucial role in advancing broadband connectivity and driving technological innovation across the region. Under his leadership, Inalan has become a leading force in providing high-speed internet solutions and fostering digital growth.

With a strong background in telecom management and strategic development, Kostiantyn has overseen numerous initiatives aimed at expanding network infrastructure and enhancing service quality. His career is marked by a commitment to delivering cutting-edge telecom solutions and improving digital access for consumers.

Kostiantyn is recognized for his strategic acumen and dedication to transforming the telecom landscape. His contributions continue to shape the future of connectivity in Greece and beyond, making him a valuable advisor to SmartphoneKey.