Full Stack Engineer

About Us

We 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 Do

• Build a world-class one-click checkout platform processing real payments at scale for D2C brands
• Own payment gateway integrations end to end — Razorpay, Cashfree, UPI flows, webhooks, and reconciliation
• Build Shopify apps end to end — OAuth, webhooks, GraphQL/REST Admin API, app embeds, metafields
• Build and maintain enterprise-grade Rails APIs and background jobs powering the checkout
• Understand the full backend infrastructure and write scalable, production-ready code
• Ship features across our checkout (Svelte) and merchant dashboard (React)
• Fix bugs, write tests, review code, and improve performance
• Work directly with product to turn requirements into shipped features

What We're Looking For

• 2+ years of professional software development experience
• Shopify ecosystem experience — apps, Admin API, webhooks, or theme/storefront work
• Strong CS fundamentals — data structures, algorithms, software design
• Hands-on with Ruby or JavaScript/TypeScript
• Back-end experience: REST APIs, PostgreSQL, Rails (or similar framework)
• React / Svelte and Sidekiq / Redis experience
• Payments experience — Razorpay, UPI, gateways, webhooks
• AWS / Heroku and CI/CD pipelines
• Comfortable with Git, testing, and debugging
• Works independently and communicates clearly in a remote team
• B.Tech/B.E. in CS or equivalent practical experience