Cross-Channel User ID in GA4: Deep Dive Implementation

Hello, I'm Maciej 👋. As the Founder & CEO of Datomni, I specialize in building analytics and customer data infrastructures for global companies. With over five years of experience, I've implemented data solutions across 20+ countries, supporting Y Combinator startups, INC500 companies, and publicly traded organizations. Beyond Datomni, I gained valuable experience developing data and growth solutions alongside the founding team of a Polish startup that was later acquired by Everfield (UK) following its participation in Google Campus. This experience shaped Datomni's core mission: replicating proven approaches to analytics and data-driven growth. I hold a Master of Arts degree, having studied both Analytics and Philosophy, which provides me with a unique perspective on data challenges. Under my leadership, Datomni has developed several open-source tools, downloaded thousands of times by the data community.