From Monolith to State-of-the-Art Banking
summary
Claims migration of a legacy core to a homegrown platform over three years, ending with all customers moved in Q2 2021, using event sourcing + CQRS and AWS managed services. Architecture runs 93 Go microservices on Kubernetes, stores events in DynamoDB + Postgres snapshots, and uses SNS/SQS for orchestration. A 300 million–record backfill finishes with six hours to spare; reconciliation tooling yields effectively zero consistency failures. Outcome: new ledger rebuilt from events, higher scalability and observable retry/supervisor tooling to detect stalled payments.
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chapters (6)
- 0:00Intro
- 3:11Core banking
- 11:38There's not optimization in a bad design
- 18:58The major disadvantage of distributed software
- 25:38Migration plan
- 35:06Outro
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