I'm a backend engineer who takes code quality seriously.
Currently at Visa, I build payment infrastructure that handles millions of transactions daily while maintaining 99.999% availability. I specialize in Java, Spring Boot, and MongoDB, with a focus on reliability, performance at scale, and integrating AI capabilities.
Outside of work, I'm usually at my local gym trying to set personal records, or trying to 100% whatever game I'm currently obsessed with. Occasionally, you'll find me 30 meters underwater somewhere, or wandering around a new city.
Senior Software Engineer
Jul 2026 — PresentSoftware Engineer
Jun 2023 — Jun 2026
Value-Added Services (Transaction Services)
- Own and maintain critical Visa Transaction Controls and Visa Flexible Credentials APIs integrated with VisaNet, serving issuer applications with sub-300ms response times and 99.999% availability
- Led development of real-time operational analytics platform providing granular DB performance metrics, reducing incident remediation time by 50%+ through pre-emptive anomaly detection
- Executed MongoDB migration from replica sets to sharded clusters, supporting scale from 300M to 5B+ cards with zero downtime
- Pioneered AI integration: deployed production AI feature validating merchant category codes, cutting client onboarding time by 90%; developed MCP server for internal debugging
- Mentored 3 new engineers as onboarding buddy, achieving <2 week time-to-first-commit
YAGFI - yet another good first issue
OSSGitHub "good first issue" aggregator backend
Multiple contributions to an open-source project that helps developers find beginner-friendly issues. Implemented license features, country detection, developer tooling (Makefile), and the project's first integration test.
Daily Kopi
PersonalDaily news digest delivered to Telegram
A scheduled Go job that pulls curated RSS feeds per topic, skips links already sent, and delivers a morning digest to each recipient on Telegram. Runs entirely on GitHub Actions; no server, no database.
TakeLeave.sg
PersonalPTO tracking and forecasting for Singapore workers
A personal leave tracking web app with running balance forecasts, a what-if simulator for planning hypothetical leave, and JSON export/import for backups. All data stays in localStorage; no backend, no auth.