Senior Full- Stack Engineer, Shopify & E-Commerce
Uses AI assistants as an accelerant but explicitly discourages 'vibe coding'—AI tools should speed work while engineering judgment remains primary.
About the Role
Senior Full-Stack Engineer role focused on building and owning Shopify and custom ecommerce systems, including cart/checkout, subscriptions, experimentation, tracking, and AI-assisted engineering workflows. The hire will improve launch quality and speed across Shopify, custom frontends/backends, Cloudflare Workers, and subscription flows while owning QA, deployments, and production reliability.
Job Description
Role
Senior Full-Stack Engineer responsible for building and maintaining high-quality ecommerce experiences across Shopify and custom infrastructure. The role spans Shopify cart/checkout flows, custom frontend and backend services, subscription systems, experimentation and tracking, and edge infrastructure.
Key Responsibilities
- Own Shopify, cart, checkout, and ecommerce funnel work (approx. 40%).
- Build and ship frontend experiences using React and Next.js (occasionally Vue) and maintain custom web apps and services (approx. 25%).
- Develop and extend Cloudflare Workers, reverse-proxy, and split-testing/experimentation infrastructure (approx. 15%).
- Implement and improve subscription experiences and customer portal integrations (Recharge and similar) (approx. 10%).
- Lead QA, release processes, code reviews, and uphold technical standards (approx. 10%).
- Integrate third-party APIs, manage webhooks, and design robust APIs and backend services.
- Implement and validate tracking across experiments, attribution, and analytics (Amplitude, Elevar, PostHog, server-side tracking or similar).
- Use AI-assisted coding tools as a force multiplier while maintaining engineering judgment.
- Monitor launches, catch edge cases, and communicate risks and scope early and clearly.
Requirements
- Production experience with Shopify: Admin API, Storefront API, webhooks, and checkout/cart/product/variant logic.
- Strong experience with React and/or Next.js and TypeScript or modern JavaScript.
- Node.js (or similar) backend experience and solid API design skills.
- Experience integrating third-party APIs, using Git/GitHub PR workflows, and owning production deployments.
- Proven track record debugging production issues and delivering fast, reliable, maintainable software.
- Comfortable using AI dev tools as an accelerant while applying engineering judgment.
Strongly Preferred
- Experience with Recharge or similar subscription platforms (Skio, Stay.ai, Smartrr, Ordergroove, Loop).
- Familiarity with Shopify Functions / Checkout extensibility.
- Experience with Cloudflare Workers, reverse proxies, or edge infrastructure.
- Background in A/B testing and experimentation systems.
- Ecommerce analytics and tracking experience (Amplitude, Elevar, PostHog, server-side tracking).
- Performance optimization for high-traffic ecommerce pages.
- Building internal tools for ecommerce/ops/catalog management.
- Hands-on experience with AI-assisted coding workflows (Cursor, Claude Code, GitHub Copilot, ChatGPT, or similar).
What Success Looks Like
- Faster, smoother ecommerce launches with fewer post-launch issues.
- High-impact Shopify, checkout, subscription, and tracking work requiring less CTO oversight.
- Clean implementation and measurement of A/B tests, pricing changes, and checkout updates.
- AI tools improve engineering velocity without sacrificing quality.
- Other engineers level up through collaboration and code reviews.
Logistics & Benefits
- Full-time, fully remote; EST working hours; US-based.
- Competitive salary.
- 100% company-paid health, dental, vision & life insurance for employees (family coverage available at employee cost).
- 401(k) retirement plan.
- Parental leave.
- Free access to Javvy products.
- Career growth opportunities in a collaborative, fast-paced startup.