William Tarnowski is a seasoned entrepreneur, with a rich background in digital advertising, marketing, and communication. He began his career by creating an adtech startup known as Swiper, which was a massive success with over 500,000 users in France. In addition, the company launched another project named Eclipse by Swiper, which revolutionized push notifications. After four years of operations and up to fifteen employees, William was compelled to shut down Swiper due to some regulatory reasons. However, he did not give up on his entrepreneurial spirit, and he is currently the Product Manager and responsible for digital transformation at Rent a Car, a prominent firm in the car rental sector in France.

William has a strong educational background in science, technology, and health, with an undergraduate degree from the Université Paris-Est Créteil (UPEC) and a Master's degree in Marketing and Communications in Health and Pharmaceutics from Sup'Biotech. He also briefly studied medicine at the Université Paris Descartes and attended Keimyung University.

Besides his remarkable career achievements, William has demonstrated entrepreneurship skills in various fields such as advertising, digital advertising, adtech, partnerships, marketing, content marketing, branding, communication, media, programmatic selling, and innovation. He is a tech enthusiast with a creative spirit, who has developed a strong passion for blockchain technology in recent years.