Full Stack Engineer

About UsWe build COD King and RabbitPay — a one-click checkout and COD verification suite for D2C Shopify brands. Fully remote team, high ownership, clean architecture.What You'll DoBuild a world-class one-click checkout platform processing real payments at scale for D2C brandsOwn payment gateway integrations end to end — Razorpay, Cashfree, UPI flows, webhooks, and reconciliationBuild Shopify apps end to end — OAuth, webhooks, GraphQL/REST Admin API, app embeds, metafieldsBuild and maintain enterprise-grade Rails APIs and background jobs powering the checkoutUnderstand the full backend infrastructure and write scalable, production-ready codeShip features across our checkout (Svelte) and merchant dashboard (React)Fix bugs, write tests, review code, and improve performanceWork directly with product to turn requirements into shipped featuresWhat We're Looking For2+ years of professional software development experienceShopify ecosystem experience — apps, Admin API, webhooks, or theme/storefront workStrong CS fundamentals — data structures, algorithms, software designHands-on with Ruby or JavaScript/TypeScriptBack-end experience: REST APIs, PostgreSQL, Rails (or similar framework)React / Svelte and Sidekiq / Redis experiencePayments experience — Razorpay, UPI, gateways, webhooksAWS / Heroku and CI/CD pipelinesComfortable with Git, testing, and debuggingWorks independently and communicates clearly in a remote teamB.Tech/B.E. in CS or equivalent practical experience