Distributed backend architecture handling 1M+ transactions/day, designed for guaranteed delivery, fault tolerance, and zero-downtime deployments.
- Message Brokers: IBM MQ + Azure Service Bus for async inter-service communication
- Backend Services: Spring Boot microservices with idempotent message consumers
- Database: PostgreSQL with optimised query patterns (20-30% response time improvement on 100k+ record datasets)
- Orchestration: Kubernetes (AKS) with Docker containers
- IaC: Terraform for infrastructure provisioning