When Booking.com introduced AI coding tools to over 3,000 developers, adoption was slower than expected due to organizational as well as technical challenges. With a strategy focused on experimentation, real business use cases, and close measurement of impact, we turned that early experience into a foundation for widespread adoption at scale. Now, two thirds of our developers use AI tools consistently, resulting in accelerated time to market, more time for innovation, and fast-tracked modernization projects. This talk will share the practical lessons we learned about driving AI adoption as an organizational capability, not just an individual productivity tool.