Selected work focused on backend systems—Open APIs, payments, ETL/data platforms, and distributed services.
I care about reliability, security, performance, and clean service boundaries.
Led backend development for payment services integrating external payment gateways. Built reliable callback orchestration and notification flows, improved API robustness, and strengthened unit test coverage to meet quality gates.
Built ETL solutions to migrate and transform data from OLTP systems to OLAP for analytics and reporting. Optimized queries, implemented scheduled reporting, and improved reliability across environments.
Designed and developed secure Open APIs for account & payment, onboarding, direct debit, and WebView flows. Focused on idempotency, callback orchestration, failure recovery, and compliance-ready API design.
Built data crawling/streaming services and migrated data into Elasticsearch (raw & clean indexes). Developed Spring Boot APIs backed by Elasticsearch, with production monitoring and alerting.
