Global Payments Platform Modernization
Re-architected a legacy monolith into an event-driven payments platform handling millions of transactions daily.
Problem
A monolithic system caused scaling bottlenecks, slow releases, and fragile integrations across issuing, acquiring, and reconciliation.
Approach
Interviewed stakeholders, mapped domain boundaries, defined events and SLAs; iteratively carved out bounded contexts with clear APIs.
Architecture
Event-driven microservices using Kafka for async workflows, CQRS for read-heavy endpoints, Postgres for transactional stores, Redis for caching.
Tradeoffs
Accepted eventual consistency for certain flows; increased operational complexity offset by improved reliability and scalability.
Outcome
99.95% availability, p95 latency reduced by 43%, deploys >20/day with blue/green; auditability and compliance significantly improved.