Antu Manna

I’m a results-driven Senior Java Backend Developer with 4+ years of experience building scalable, cloud-native microservices and RESTful APIs for high-volume financial platforms. I bring deep fintech domain expertise across Dispute & Chargeback Management, Virtual Card Account (VCA) systems, and fraud detection, including end-to-end chargeback lifecycle execution in Visa/Mastercard compliance.

At Citi’s GRACE Platform, I designed and developed an enterprise-grade Dispute Management System (DMS) using Java 17 and Spring Boot, delivering automated processing from case initiation through resolution and closure. I built secure REST APIs for dispute workflows, implemented real-time dispute status tracking, and created an event-driven notification system with Solace to reduce manual follow-up by ~50%. I also engineered a Redis-based idempotency/duplicate detection layer that eliminated ~95% of duplicate submissions, protecting revenue and lowering operational overhead.

I’ve expanded the platform with microservices for VCA lifecycle management (50,000+ active virtual cards), a distributed session management microservice using Redis for low-latency state, and a GRACE observability service spanning 200+ microservices. I focus on reliability, traceability, and operational excellence—improving MTTR by 35% with distributed tracing and supporting SLA adherence by reducing manual intervention by ~40% while delivering consistent on-time results in Agile/Scrum.