Goldman Sachs' Transaction Banking platform shares its journey to achieving zero-downtime for critical payment flows processing billions of dollars daily. The session explores the bank's architecture and deployment strategies using AWS services like ECS, CloudWatch Synthetics, CodeDeploy, MSK, Lambda, and Aurora. Key insights include implementing Blue/Green deployments, deep health checks, and a micro-account structure to enhance resilience and availability. The team discusses lessons learned in managing complex, distributed systems and their approach to continuous deployment while maintaining 24/7 uptime. Future enhancements like chaos testing and zero-touch releases are also outlined. This comprehensive look at Goldman Sachs' high-availability practices offers valuable insights for organizations aiming to build robust, always-on financial systems in the cloud.