At Datastream Digital, I designed and owned Node.js CRM microservices that split a monolithic billing flow into payment, POS reconciliation, CDR ingestion, and deposit-management services, processing BND 300K+ in monthly transactions. I also delivered a Next.js bulk SMS system for 500+ enterprise clients with chunked processing, job tracking, and delivery analytics.
Previously at Tourego, I owned features, fixes, and releases for three native Android tax-refund apps serving Singapore and Japan. The public app reached 10,000+ downloads, while B2B apps supported 200+ retail partners; I also supported PCI DSS and Deloitte security audits.
I build across Go, Node.js, Android, Flutter, and AWS. My projects include an OAuth2/OIDC authorization and resource server in Go with PKCE, ABAC, JWT validation, passkeys, Dockerized infrastructure, PostgreSQL, and Redis.
