Leszek is a co-founder and CEO of The Rectangles - UX design agency. He's an entrepreneur, UX design and optimization consultant with 10+ years of experience. His team helps customer-oriented businesses grow organically through user-centered design, digital analytics and conversion optimization. He works mainly with retail, ecommerce, SaaS and startup businesses. In the past, he co-founded and scaled one of the largest web-development companies in Poland. The company was later acquired by a Polish VC firm (in 2014). He's a co-author of User-Centered Design Canvas, a UX design and research tool, helping companies combine user needs with business goals. The tool has been used by thousands of teams and individuals, including the professionals from NASA, Adobe or Blizzard. For the last 5 years, he''s been teaching UX design at The University of Wroclaw.