The CTO Podcast with Fexingo · 2026-07-11 · 12 min
In this episode, Lucas and Luna dig into Stripe's 2025 architecture overhaul to handle 100 million API calls per day. They explore the specific bottlenecks - from database contention in PostgreSQL to the migration toward a new ledger service and idempotency keys at scale. Lucas explains how Stripe split its monolithic Payments monolith into domain-oriented services, the trade-off between strong consistency and availability, and why they chose a custom event-sourcing layer over off-the-shelf solutions. Luna challenges the cost of such a rebuild, and they weigh the 'if it was worth it' bet. A technical deep dive for engineers and leaders building at scale. #Stripe #PaymentsInfrastructure #APIArchitecture #EventSourcing #DomainDrivenDesign #PostgreSQL #LedgerService #Idempotency #Scalability #Microservices #FinancialSystems #EngineeringLeadership #CTOPodcast #FexingoBusiness #BusinessPodcast #SystemDesign #TechArchitecture #100MillionAPI Keep every episode free: buymeacoffee.com/fexingo
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