Professional Scrum Trainer with Scrum.org, agile coach, and Scrum Master based in Berlin. XSCALE Alliance steward and Business Agility Coach. (PSM I-III, XBAC, CSP, CSPO, CSM, CLP.) Stefan also curates the weekly ”Food for Agile Thought” newsletter on best posts on agile and lean methodologies and product management—with 24,000-plus subscribers the largest of its kind. (See @AgeOfProduct.) Moreover, he hosts the Hands-on Agile Slack community with more than 5,500 peers. Twitter: @StefanW