Mohammad Yusuf Khan — Java backend engineer with FinTech expertise: payments, QBO sync, and reconciliation at 10K+ txns/day. System design (HLD/LLD), Kafka-ready event flows, Redis caching, and production design patterns.
Architecture and platform skills I apply in FinTech and high-throughput backends.
FinTech sync engine — system design from HLD to LLD, transactional caching, and patterns built for audit-safe retries. Kafka-ready architecture.
End-to-end HMS: appointments, billing, inventory, RBAC — Docker on AWS with observability.
Six live sites — scoped, built, and supported independently.
I learn by shipping — production Spring Boot by day, real client sites when I need the full loop. I own problems until they're stable. Grab the full CV for everything else.