Explore the relevance of data modeling in modern software engineering in this 40-minute conference talk from Devoxx Greece 2025 presented by Scott Sosna. Challenge the notion that formal data modeling is obsolete in today's agile development environment. Discover how data modeling extends far beyond traditional database persistence to include API payloads, messages, configuration files, document metadata, and Redis indexes. Learn practical approaches to data modeling specifically tailored for software engineers, offering insights that bridge the gap between agile development practices and sound data architecture principles.