Bukalapak, one of Southeast Asia's largest e-marketplaces, handles over 1.5 petabytes of data daily from various sources, including user interactions and product listings. The company has transitioned from a fragmented data architecture to a robust data lake and warehouse solution, enabling advanced AI capabilities and real-time health insights. Bukalapak emphasizes that big data is not only for generating business reports but also for driving significant business growth and improvement.