MARIUSZ GROMADA is a senior banking executive with 20+ years of experience at the intersection of customer strategy, analytics, and technology in large-scale B2C organizations. As Head of Customer Intelligence at a major bank in Poland, he focuses on AI-driven personalization, next-best-action decisioning, and transparent impact measurement. He is the author of ""Customer First. Value Next."" and the creator of MathParser.org, a widely used open-source math library.