> Markdown version of [/jobs/ext/3016640-senior-frontend-developer_cells-litelement](https://www.wearedevelopers.com/jobs/ext/3016640-senior-frontend-developer_cells-litelement). 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).

---

# Senior Frontend Developer_Cells&LitElement

- **Company:** Social you
- **Location:** Spain
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Apple IOS, Cascading Style Sheets (CSS), Software Quality, Software Design Patterns, Web Development, Postman, Git, Git Flow, Restful APIs, Es2015, Mocha, Jasmine
- **Published:** September 20, 2026
- **Apply:** https://socialyou.es/senior-frontend-developer_cellslitelement/

## About the Role

* Experiencia sólida en JavaScript, CSS, Ecmascript6.
 * Conocimiento en Web Components (LitElement, Polymer).
 * APIs RESTful y uso de Postman.
 * Experiencia en tests (Jasmine, Mocha, Karma).
 * Manejo de Git/Gitflow.
 * Valorable experiencia en apps móviles (Android/iOS) y en sector bancario (medios de pago, tarjetas, loyalty).

## Description

Buscamos incorporar un/a Desarrollador/a Senior Frontend para trabajar dentro del área de Arquitectura, participando en el diseño y desarrollo de APIs y aplicaciones web innovadoras., * Desarrollo de aplicaciones web con las últimas tecnologías.

 * Definición de arquitecturas Frontend y soporte en prototipos.
 * Aplicación de patrones de diseño y buenas prácticas.
 * Reporting de avances y cumplimiento de plazos.
 * Asegurar calidad del código mediante tests unitarios.
 * Colaborar en proyectos Agile y proponer mejoras continuas.
 * Perfil colaborativo, con ganas de aprender y crecer.


## Related Videos

- [Unleash your web skills on native!](https://www.wearedevelopers.com/videos/122-unleash-your-web-skills-on-native)
- [Test Driven Development with JavaScript](https://www.wearedevelopers.com/videos/222-test-driven-development-with-javascript)
- [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)
- [There's an app for that - on the role of cross platform development in the app development ecosystem](https://www.wearedevelopers.com/videos/278-there-s-an-app-for-that-on-the-role-of-cross-platform-development-in-the-app-development-ecosystem)
- [Form Validation. The Tested Way](https://www.wearedevelopers.com/videos/314-form-validation-the-tested-way)
- [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews)

## Related Articles

- [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025)
- [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front)
- [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025)
- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [Dev Digest 139 - Soft and hard queries](https://www.wearedevelopers.com/magazine/487-dev-digest-139-soft-and-hard-queries)
- [25 Essential Tools for Front End Developers](https://www.wearedevelopers.com/magazine/210-25-essential-tools-for-front-end-developers)