Senior Frontend Engineer - 100% Remote (Castro Urdiales)

UST España & Latam • castro urdiales, cantabria, Spain • Posted June 18, 2026

Location castro urdiales, cantabria
Job Type Full-time
Category Other-General
Posted June 18, 2026

About UST

UST is a multinational company based in North America, certified as a Top Employer and a Great Place to Work. We have over 35,000 employees worldwide and a presence in more than 35 countries, leading in digital technology services for large-scale technological solutions.

Position

Senior Frontend Engineer with experience in modern frameworks such as React, Vue, or Angular.

Responsibilities

  • Lead the development of Progressive Web Applications (PWAs) for complex digital environments.
  • Design and architect scalable, high‑performance PWA solutions for eCommerce platforms.
  • Implement advanced Service Worker strategies, including intelligent caching, offline capabilities, and performance optimisation.
  • Develop responsive, mobile‑first user interfaces using modern frameworks such as React, Angular, or Vue.js.
  • Integrate PWA frontends with backend APIs and enterprise platforms such as Salesforce Commer...

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