Mario Gunawan

I build mobile and frontend products across GoPay, Gojek, and Yourbestie. At GoTo Financial, I led Alicloud Mini App Dev Kit integration into GoPay and authored the RFC that informed the build-versus-buy decision.

I've helped build GoPay's in-house miniapp SDK, publishing its client library as @gopay/miniapp-client. I also co-developed an OCR bill-splitting feature serving 100,000 daily users, maintained Google linking for pay-with-GoPay, and revamped the QRIS scanner in Gojek's native Android app.

Earlier at GoPay, I built reusable campaign banners, maintained a promotion system serving roughly 900,000 daily users, and contributed an internal testing library to improve code quality.

Now at Yourbestie, I'm building a Flutter internal-operations app and the complete customer-facing web product with TypeScript, Svelte, Tailwind CSS, and multi-region i18n. I also build independent products, including a Kotlin Android App Blocker and Investnote, a self-hosted market-disclosure digest service.