Karavela: Architecting a high-scale financial IDP at Stone

In the financial sector, moving fast while staying compliant is essential.

In this session, the speakers present Karavela, Stone's internal developer platform designed for high-scale financial operations. The talk explores the technical architecture that enables 1,600 engineers to ship code within a strictly regulated PCI-DSS and SOX environment. It details the transition from legacy pipelines to a composed IDP using Temporal for resilient orchestration, ArgoCD for GitOps, and Crossplane for cloud-native infrastructure provisioning.

Key takeaways:
• The orchestration layer: Leveraging Temporal to manage long-running, atomic workflows with complex dependencies.
• Declarative infrastructure: Using Crossplane to eliminate PR bottlenecks and align infrastructure with GitOps.
• Safe delivery at scale: Implementing canary and blue-green rollouts via Argo to minimize blast radius and enable multi-region strategy.