Building a platform where kids might be present? The regulatory landscape changed substantially in 2024 and 2025, and the compliance obligations are more specific than many developers realize. This is a practical breakdown of what the EU Digital Services Act and UK Online Safety Act actually require at the technical level, and what compliant infrastructure looks like. Are you in scope? The EU Digital Services Act's child safety obligations (Article 28) apply to any online platform accessible to minors in the EU. "Accessible to minors" is the operative phrase: if children can access your service, you are in scope. You do not have to specifically market to children. The DSA came into full application in February 2024. The UK Online Safety Act takes a similar approach: services "likely to be accessed by children" in the UK fall under child safety duties. Ofcom is publishing a categorization register in mid-2026 that will explicitly list which services are in scope.…