Descripción de la oferta
pbRole: /b Senior Frontend Developer (Contract) /ppbRate: /b Up to €300 - €400/day /ppbStart: /b ASAP /ppbDuration: /b Open-ended /ppbr/ppbOverview /b /ppWe’re hiring a Senior Frontend Developer to deliver high-performance, conversion-focused web experiences across customer-facing platforms and internal tools. This is a hands-on contract role with immediate impact, suited to someone who thrives in fast-paced, product-led environments. /ppYou’ll work closely with Product, Marketing, and Design to build interfaces that are not only technically strong, but also optimised for user engagement and performance. /ppbr/ppbResponsibilities /b /pp • Build modern, high-converting user interfaces with strong attention to UX and performance /pp • Develop and maintain frontend code for public websites and internal tools /pp • Ensure full responsiveness and cross-browser compatibility /pp • Integrate frontend components into PHP environments using Twig or similar templating systems /pp • Execute A B testing implementations and optimise based on performance data /pp • Conduct thorough browser and device testing to ensure reliability /pp • Collaborate with Product, Marketing, Design, QA, and Operations /pp • Maintain code quality through reviews and best practices /pp • Take ownership of features from development through to production /ppbr/ppbRequirements /b /pp • 5+ years frontend development experience in production environments /pp • Strong HTML5, CSS3, and JavaScript (ES6+) fundamentals /pp • Solid experience with jQuery and working in PHP-based environments /pp • Experience with Twig or similar templating engines /pp • Strong CSS architecture knowledge, including BEM and SASS /pp • Experience with NPM, Yarn, or similar tooling /pp • Proven ability to build from scratch, not purely framework-driven /pp • Experience with A B testing and performance optimisation /pp • Strong debugging and cross-browser testing skills /pp • Experience working independently with high ownership /pp • Hands-on use of AI tools and ability to implement AI-driven features or agents /pp • Conversational Spanish and intermediate English /ppbr/ppbNice to have /b /pp • React and or TypeScript exposure /pp • Experience mentoring or supporting junior developers /pp • Involvement in architecture or technical decision-making /p
