E-commerce & Payment Development
Storefronts and payment flows that actually take money reliably — verified server-side, delivered exactly once.
Who this is for
- Brands and sellers moving from DMs and manual invoices to a real storefront.
- Businesses that need local (QRIS) and card payments wired up correctly.
- Shops burned by double-charges, missed orders or manual fulfilment.
Problems it solves
- Orders and payments are tracked by hand, so things get missed or charged twice.
- Payment integration is fiddly, and getting webhooks and refunds right is harder than it looks.
- Off-the-shelf carts do not fit the products, pricing or local payment methods.
What I build
- Product catalogues, carts and checkout tailored to your products and pricing.
- QRIS, Midtrans, Pakasir and Stripe integrations verified server-side.
- Idempotent fulfilment and webhooks so every paid order is delivered exactly once.
- Admin panels for inventory, orders and content owned by your own team.
Technologies
- Next.js
- React
- TypeScript
- Cloudflare Workers
- QRIS / Midtrans / Pakasir / Stripe
- Supabase / D1
How it works
- Intro call (free, 20 min). You describe the product and the problem; I tell you honestly whether I’m the right fit.
- Scoped proposal. Fixed scope, fixed price, written acceptance criteria — no open-ended hourly billing.
- The work. Weekly demos on a preview URL, a written handover, and a walkthrough call at the end.
Related work
Book an intro call
Prefer async? hello@ksatriabintangsamudra.com, or see how to hire me and all services.