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Ulf de Albuquerque Sahlin is a seasoned Development Manager at Puzzel since November 2022, previously serving as Founder and CTO at S2 Communications AB from June 1999 to October 2022, where a focus on usability and early adopter feedback influenced service development. Additionally, Ulf co-founded Fedlogin Security AB, which innovated VPN login security with one-time passwords from June 2007 to December 2012, and led Softcell as Founder and CTO from 2004 to 2006, addressing the complexities of mobile content distribution prior to the advent of the iPhone and App Store. Ulf holds a Master of Science in Computer Science from Uppsala University (1997-2001) and completed studies at Stanford University Graduate School of Business (September 2021 - August 2022).