> Markdown version of [/jobs/ext/314729-frontend-senior-developer-shopify-freelance-en-barcelona](https://www.wearedevelopers.com/jobs/ext/314729-frontend-senior-developer-shopify-freelance-en-barcelona). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Frontend Senior developer Shopify - Freelance en Barcelona

- **Company:** Michael Page
- **Location:** Sant Cugat del Vallès, Spain
- **Contract:** Temporary contract
- **Skills:** HTML, Application Programming Interfaces (APIs), Business Logic, Microsoft Azure, Cascading Style Sheets (CSS), Code Review, Salesforce.Com, SAP (Applications), Shopify, Web Content Accessibility Guidelines, Klaviyo Email and SMS Marketing, ReactJS, Git, Odoo, Microsoft Business Central, Front End Software Development, Es2015
- **Published:** June 19, 2026
- **Apply:** https://www.infoempleo.com/ofertasdetrabajo/frontend-senior-developer-shopify-freelance/barcelona/3187476/

## About the Role

* Experiencia demostrable en Shopify avanzado: storefront, carrito, checkout, variantes, multilenguaje y multimercado.
* Capacidad para crear sistemas con lógica compleja: suscripciones, fidelización, calendarios de entrega, POS, procesos asíncronos y tiempo real.
* Experiencia sólida en integraciones con sistemas externos: Business Central, SAP, Odoo, Salesforce, Klaviyo, etc.
Comodidad trabajando con código legacy, documentación incompleta y APIs inestables.
Perfil autónomo y resolutivo, acostumbrado a equipos reducidos y a tomar decisiones técnicas con impacto directo.

## Description

* Desarrollar y optimizar interfaces Shopify usando Liquid OS 2 0, HTML/SCSS, JavaScript ES6+ y React (Checkout & Account Extensions)
* Construir aplicaciones completas con lógica de negocio avanzada, no solo componentes aislados.
* Integrar Shopify con ERPs, CRMs, plataformas de marketing y sistemas logísticos, gestionando APIs complejas y poco documentadas.
* Garantizar alto rendimiento web (Core Web Vitals) y cumplimiento de accesibilidad WCAG 2 1.
* Gestionar catálogos extensos (hasta 160 000 SKUs) con estrategias de filtrado, paginación y carga eficiente.
* Participar en migraciones a Shopify (contenido, redirecciones, testing visual, coordinación técnica)
* Mantener entornos productivos en Azure (Web Apps, Functions, monitorización y costes)
* Trabajar en un equipo pequeño, con autonomía, ownership y participación activa en PRs, code reviews y Git avanzado.


## Related Videos

- [Recruitment Reinvented: Bold strategies and the $10K signing incentive](https://www.wearedevelopers.com/videos/1068-recruitment-reinvented-bold-strategies-and-the-10k-signing-incentive)
- [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web)
- [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94)
- [Modern Headless Commerce with Vendure](https://www.wearedevelopers.com/videos/489-modern-headless-commerce-with-vendure)
- [NoLoJS - Avoiding JavaScript Cruft with HTML and CSS - Aaron T. Grogg](https://www.wearedevelopers.com/videos/1806-nolojs-avoiding-javascript-cruft-with-html-and-css-aaron-t-grogg)
- [Coffee with Developers](https://www.wearedevelopers.com/videos/354-coffee-with-developers)

## Related Articles

- [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)
- [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)
- [The Best Job Search Websites of 2025](https://www.wearedevelopers.com/magazine/368-the-best-job-search-websites-of-2025)