Note: The job is a remote job and is open to candidates in USA. Javvy Coffee is a better-for-you beverage company growing from a direct-to-consumer brand into an omnichannel business with major retail expansion. The Senior Full-Stack Engineer will own Shopify and e-commerce development across custom frontend and backend systems, checkout and subscription experiences, experimentation, tracking, infrastructure, and release quality.

Responsibilities

• Build and maintain high-quality ecommerce experiences across Shopify and our custom infrastructure
• Work with Shopify APIs, product/variant data, cart behavior, checkout constraints, and webhooks
• Ship frontend experiences in React, Next.js, and occasionally Vue
• Build backend services, integrations, and internal tools
• Extend our Cloudflare Workers and reverse-proxy/split-testing infrastructure
• Support A/B testing and experimentation across the ecommerce funnel
• Improve subscription experiences — Recharge/customer portal flows, cancellations, product swaps, rebill logic, and retention features
• Implement and validate tracking across experiments, attribution, and analytics (Amplitude, Elevar, PostHog, server-side tracking, or similar)
• Use AI coding tools as leverage — to move faster, explore approaches, debug, and check your own work
• Own pre-launch QA for high-impact launches: pricing tests, checkout changes, subscription changes, tracking updates
• Catch edge cases before customers or the business do, and monitor launches after release
• Communicate early and clearly — especially when something's risky, under-scoped, or likely to break

Skills

• Production experience with Shopify — Admin API, Storefront API, webhooks, product/variant/cart/checkout logic
• Strong React and/or Next.js, plus TypeScript or strong modern JavaScript
• Node.js (or similar) backend experience and solid API design chops
• Comfort integrating third-party APIs, using Git/GitHub PR workflows, and owning production deployments
• A track record of debugging production issues and building software that's fast, reliable, and maintainable
• Sound judgment using AI dev tools — as an accelerant, not a substitute for engineering fundamentals
• Recharge or a similar subscription platform (Skio, Stay.ai, Smartrr, Ordergroove, Loop, etc.)
• Subscription flows: skips, delays, swaps, rebills, save offers
• Shopify Functions / Checkout Extensibility
• Cloudflare Workers, reverse proxies, or edge infrastructure
• A/B testing or experimentation systems
• Ecommerce analytics and tracking tools (Amplitude, Elevar, PostHog, server-side tracking)
• Performance optimization for high-traffic ecommerce pages
• Building internal tools for ecommerce, ops, or catalog management
• Real, hands-on experience with AI-assisted coding workflows (Cursor, Claude Code, GitHub Copilot, ChatGPT, or similar)

Benefits

• Fully remote work arrangement for US-based employees during EST working hours
• 100% company-paid health, dental, vision, and life insurance for employees; family coverage available at employee cost
• 401(k) Retirement Plan
• Parental Leave
• Free access to Javvy products
• Career growth opportunities
• Collaborative, fast-paced start-up environment

Company Overview