JavaOne 2026 Session

Summary

Caixa Econômica Federal (CAIXA) in't just a bank; it's the financial backbone of Brazil, serving over 150 million citizens. With a volume of 8 billion transactions/month, CAIXA faces engineering challenges that demand resilience and concurrency. This session shows how CAIXA leverages a robust architecture to sustain this hyperscale operation. You'll explore the journey from monolithic systems to modern ecosystem where Java microservices (Spring Boot and Quarkus) orchestrate complex interactions between digital channels and core ledgers. We'll discuss the partnership with Oracle, using Exadata Cloud@Customer to ensure the data persistence needed by the instant payment system, which processes over 40 million daily operations. Learn the patterns used to handle traffic spikes during national social benefit payouts. We'll dissect how the synergy between Java's agility and Oracle's robust infrastructure empowers CAIXA to bridge the gap between legacy reliability and cloud-native innovation.