Started developing in 2001, Erwin gained performance knowledge and best practices via trial & error within his own agency and reading many (Google) docs. At the end of the last decade, Erwin started sharing his learnings. Both during public events and privately with merchants & development + SEO agencies via audits & training sessions to help them saving trial & error hours and allowing them to improve decision making with performance in mind. He shares best practices and (case) insights on regular basis via LinkedIn and co-founded a real monitoring solution (RUMvision), at which he is also the CTO. He became a Google Developer Expert (GDE) in web technologies in 2023.