Senior Full-stack Engineer

Justin Emmanuel Mercado is a Senior Full-stack Engineer with approximately 10 years of experience, currently at PayMongo (YC S19). He is proficient in shipping end-to-end solutions, covering frontend, backend, and infrastructure. His key achievements include rebuilding the merchant dashboard in Next.js, migrating paymongo.com from Webflow to Next.js + Ghost on AWS, leading the React Native merchant app development (OTP/KYC onboarding, USDC/USDT wallet integration), and building an internal employee dashboard used by Compliance, Finance, and PayOps. He is looking for remote full-stack roles, with a bonus interest in payments/fintech.