Shopify Developer (Mid-Level)

Job Overview

Most Lab is a design-driven studio that builds Shopify stores merchants rave about. You’ll own both the storefront and the stack underneath—turning slow, bloated themes into sub-second experiences and writing custom apps when the app store can’t keep up. If you speak fluent Liquid, JavaScript, and AWS, keep reading.

Key Responsibilities

• Refactor legacy themes (Dawn, Impulse, Turbo, etc.) to 90+ Lighthouse across Core Web Vitals while preserving merchant-friendly drag-and-drop sections.
• Prototype and ship custom storefront features: advanced filtering with Algolia, bundle builders, subscription upsells via Recharge, tiered pricing, and checkout UI extensions.
• Implement headless storefronts with Hydrogen + Oxygen or Next.js + Storefront API when performance or design freedom demands it.
• Write automated tests (unit, integration, e2e) using Vitest, Jest, and Cypress to keep regressions at zero.
• Profile database queries, optimize Liquid loops, lazy-load images, split JS bundles, and prune rogue apps to keep mobile TTI < 2.5 s.
• Design CI/CD pipelines with GitHub Actions, Docker, and Terraform to deploy themes and apps to staging and production with a single push.
• Monitor uptime and revenue-critical metrics (Grafana, Datadog) during flash sales; debug and patch issues before the client notices.
• Collaborate daily with designers and growth teams in Figma, Linear, and Slack huddles—no broken-telephone specs.
• Document architecture decisions (ADRs) and mentor junior devs through code reviews and pair programming.

Qualifications

• 2-4 years of professional experience building and maintaining Shopify themes (Liquid, JSON templates, Sections Everywhere) and/or Shopify apps (REST & GraphQL Admin APIs).
• Strong JavaScript (ES2023) and TypeScript skills; comfortable with functional and async patterns.
• Hands-on experience with at least two headless stack: Hydrogen + Oxygen, Next.js + Storefront API, or Nuxt + Shopify API.
• Proven ability to optimize Core Web Vitals: image CDNs, critical CSS, code-splitting, deferred scripts, and server-side rendering.
• Experience with Node.js server frameworks (Express, NestJS, Remix) and cloud deployment (AWS ECS, Lambda, Vercel, or Fly.io).
• Familiarity with Docker, Terraform, GitHub Actions, and automated testing workflows.
• Solid understanding of web security (OWASP Top 10), GDPR compliance, and PCI-DSS basics.
• Comfortable with Git workflows (trunk-based or GitFlow) and peer code reviews.
• Excellent written and spoken English; able to explain technical trade-offs to non-developers.
• Portfolio or GitHub links showcasing at least three custom theme and one private or public Shopify app.

What We Offer

Ready to Join Us?

If this position matches your qualifications, send your resume and portfolio to our hiring team.