Bayarjargal N

I've built Java/Spring Boot payment platforms and banking integrations at AND Global, including secure connectivity to Japanese banking systems and BANKIT for payment and settlement workflows.

My payment-processing and transaction services were maintained at 99% uptime, with a focus on transaction consistency, data integrity, authentication, authorization, and secure data transport. I've also profiled and optimized SQL queries to improve API throughput under production load.

At Astvision, I architected backend services for enterprise asset-management and integration platforms serving 80,000+ users across two organizations. I owned REST API design, data modeling, service reliability, MongoDB aggregation pipelines, and Docker-based microservice deployments with CI/CD.

I also build production-style open-source services for payment gateways, bank integrations, and ledger systems, using Kafka, Docker, Kubernetes, GitHub Actions, and automated test suites. My experience includes healthcare integrations, React frontend work, and backend APIs for AI-assisted livestock management.