Sharena — B2B2C Group-Buying Platform

Group-buying marketplace connecting suppliers, retailers, and consumers, with an offline-to-online voucher redemption flow. Revived a two-year-dormant codebase and shipped four portals — admin, supplier, consumer storefront, and in-store cashier. Integrated Stripe checkout and built a Twilio SMS OTP flow requiring customer confirmation before a cashier can redeem a voucher, closing an unauthorized-redemption gap.