Agile coach, Scrum master in Berlin. XSCALE Alliance steward and Business Agility Coach. (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 20,000-plus subscribers the largest of its kind. (See @AgeOfProduct.) Moreover, he hosts the Hands-on Agile Slack community with more than 4,400 peers. Twitter: @StefanW