Senior Shopify Frontend Developer - Freelance
Michael Page España·Barcelona, Spain
What they offer
Permanent contract
Full-time hours.
Hybrid
Office and home days — the ad has the split.
What they ask for
Have the right to work in Spain
Michael Page España doesn't mention sponsorship in the ad.
Be near Barcelona for hybrid days
No relocation package mentioned.
Have senior-level experience
Senior-level role.
Pulled from the advert automatically — the full ad is what counts.
About the role
We are looking for an expert freelance profile as a Senior Frontend Developer for an important Shopify project.
- Important digital agency specialized in Shopify and Shopify Plus
- We are looking for a Senior Shopify Frontend Developer - Freelance
What you'll do
- Develop and optimize Shopify interfaces using Liquid OS 2.0, HTML/SCSS, JavaScript ES6+ and React (Checkout & Account Extensions).
- Build complete applications with advanced business logic, not just isolated components.
- Integrate Shopify with ERPs, CRMs, marketing platforms and logistics systems, managing complex and poorly documented APIs.
- Ensure high web performance (Core Web Vitals) and WCAG 2.1 accessibility compliance.
- Manage extensive catalogs (up to 160,000 SKUs) with efficient filtering, pagination and loading strategies.
- Participate in Shopify migrations (content, redirects, visual testing, technical coordination).
- Maintain production environments on Azure (Web Apps, Functions, monitoring and cost management).
- Work in a small team, with autonomy, ownership and active participation in PRs, code reviews and advanced Git workflows.
What you'll get
Opportunities for growth and to work at one of the best Shopify agencies.
About the company & team
Important digital agency specialized in Shopify and Shopify Plus.
Who are we looking for (M/F/D)?
- Demonstrated experience with advanced Shopify: storefront, cart, checkout, variants, multi-language and multi-market.
- Ability to build systems with complex logic: subscriptions, loyalty, delivery schedules, POS, asynchronous processes and real-time features.
- Solid experience with external system integrations: Business Central, SAP, Odoo, Salesforce, Klaviyo, etc.
- Comfortable working with legacy code, incomplete documentation and unstable APIs.
- Self-sufficient and solution-oriented profile, accustomed to small teams and making technical decisions with direct impact.
About the role
Buscamos un perfil Freelance experto como Senior Frontend developer para un proyecto importante de Shopify.
- Importante agencia agencia digital especializada en Shopify y Shopify Plus
- Buscamos Frontend Senior developer Shopify - Freelance
What you'll do
- 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.
What you'll get
Oportunidades de progresión y de trabajar en una de las mejores agencias de Shopify.
About the company & team
Importante agencia digital especializada en Shopify y Shopify Plus.
¿A quién buscamos (H/M/D)?
- 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.
You'll most likely need Spanish to apply.This job was automatically translated to English, .
About the company
Michael Page España
Staffing
Michael Page España is a staffing agency.They recruit for client companies, so the employer you would work for is not named on this ad.