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# Senior Frontend Developer

- **Company:** SGS
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, HTML, JavaScript (Programming Language), Web Accessibility, Agile Methodology, Component-Based Software Engineering, Application Performance Management, Microsoft Azure, Browser Compatibility, Cascading Style Sheets (CSS), Code Reuse, Code Review, Continuous Integration, Cross-Origin Resource Sharing (Ajax Programming), Github, Performance Tuning, Preprocessor, Coupa Supplier Portal, Next.js, Web Application Security, Systems Integration, Strategies of Testing, TypeScript, Web Content Accessibility Guidelines, Web Applications, Cloud Platform System, ReactJS, Cross-Site Scripting (XSS), Backend, Git, Vue.js, Webpack, AngularJS, Material UI, Deployment Automation, Build Tools, Graphql, Front End Software Development, React Redux, Restful APIs, Domain Driven Design
- **Published:** August 5, 2026
- **Apply:** https://www.buscojobs.com.es/senior-frontend-developer-en-madrid-ID-365469128

## About the Role

5+ years of experience developing modern frontend applications.
Strong proficiency in
JavaScript
and
TypeScript .
Solid experience with at least one major framework:
Vue ,
Angular , or
React .
Strong knowledge of
HTML ,
CSS , and preprocessors ( SCSS ,
LESS ).
Experience building scalable frontend architectures and component-based systems.
Hands?on experience integrating with REST APIs and/or GraphQL.
Strong understanding of frontend performance optimization techniques.
Experience with state management solutions (e.g., Vuex, Redux, NgRx, or similar).
Familiarity with modern testing practices (unit, integration, end?to?end).
Experience with Git and collaborative workflows.
Experience working in Agile environments.
Strong communication skills and fluency in English.
Preferred Skills
Experience with design systems and UI component libraries.
Knowledge of accessibility standards (WCAG) and best practices.
Familiarity with SSR/SSG frameworks (e.g., Next.js, Nuxt).
Experience with modern build tools (Vite, Webpack, etc.).
Familiarity with cloud environments and frontend deployment strategies.
Experience with CI/CD tools (Azure DevOps, GitHub Actions, etc.).
Understanding of web security best practices (CORS, CSP, XSS prevention).
Exposure to Domain-Driven Design (DDD) concepts.

## Description

Job Description As aSenior Frontend Developer , you will play a key role in building high-quality, scalable, and user-centric web applications.You will take ownership of frontend architecture in collaboration with the UX/UI Technical Leader, ensuring a seamless and performant user experience across our products.You will work closely with product managers, designers, and backend engineers to translate business requirements into elegant and efficient frontend solutions.ResponsibilitiesDesign, build, and maintain scalable, high-performance frontend applications.Own and evolve frontend architecture, ensuring maintainability and scalability.Collaborate closely with UX/UI designers to deliver intuitive and visually consistent user experiences.Translate product and design requirements into clean, efficient, and reusable code.Promote best practices in frontend engineering (Clean Code, testing strategies, component design).Implement and maintain design systems and reusable component libraries.Optimize application performance (loading time, rendering, responsiveness).Ensure cross-browser compatibility and responsiveness across devices.Integrate frontend applications with REST APIs and/or GraphQL services.Contribute to CI/CD pipelines and improve frontend delivery workflows.Support and mentor other developers through code reviews and knowledge sharing.Contribute to technical documentation and ensure shared understanding across the team.Qualifications5+ years of experience developing modern frontend applications.Strong proficiency inJavaScriptandTypeScript .Solid experience with at least one major framework:Vue ,Angular , orReact .Strong knowledge ofHTML ,CSS , and preprocessors ( SCSS ,LESS ).Experience building scalable frontend architectures and component-based systems.Hands?on experience integrating with REST APIs and/or GraphQL.Strong understanding of frontend performance optimization techniques.Experience with state management solutions (e.g., Vuex, Redux, NgRx, or similar).Familiarity with modern testing practices (unit, integration, end?to?end).Experience with Git and collaborative workflows.Experience working in Agile environments.Strong communication skills and fluency in English.Preferred SkillsExperience with design systems and UI component libraries.Knowledge of accessibility standards (WCAG) and best practices.Familiarity with SSR/SSG frameworks (e.g., Next.js, Nuxt).Experience with modern build tools (Vite, Webpack, etc.).Familiarity with cloud environments and frontend deployment strategies.Experience with CI/CD tools (Azure DevOps, GitHub Actions, etc.).Understanding of web security best practices (CORS, CSP, XSS prevention).Exposure to Domain-Driven Design (DDD) concepts.BenefitsJoin a globally recognized and stable company, a leader in the Testing, Inspection, and Certification (TIC) industry.Enjoy aflexible schedule and a hybrid work model.Access continuous learning opportunities through SGS University and Campus.Collaborate in a multinational environment with colleagues from various continents.#J-*****-Ljbffr


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