Job Title: Senior Frontend Developer Location: Fully Remote Rate: €300–€350 per day (depending on experience) Contract: Open-ended Overview We are looking for a Senior Frontend Developer to play a key role in building and evolving high-performance web applications. You will be responsible for developing modern, conversion-focused user interfaces, contributing to frontend architecture, and driving performance improvements across a range of digital products. You will work closely with Product, Design, Marketing, QA, and Backend teams to deliver scalable, user-centric solutions.
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Key Responsibilities - Build modern, high-conversion user interfaces using React and Next.Js - Develop and maintain frontend architecture with a modular and scalable approach - Implement new features from scratch while improving and optimising existing applications - Develop frontend components for both public-facing products and internal tools - Ensure cross-browser and cross-device compatibility - Write clean, reusable, and maintainable TypeScript code - Integrate with REST and/or GraphQL APIs and manage asynchronous data flows - Participate in code reviews and contribute to engineering best practices - Continuously identify opportunities to improve performance, scalability, and user experience - Collaborate closely with cross-functional teams across Product, Design, Marketing, and QA Requirements - Strong experience with React and Next.Js - Solid experience using TypeScript in production environments - Strong understanding of modern JavaScript, including asynchronous programming (Fetch API, Axios) - Experience consuming RESTful APIs and/or GraphQL services - Good understanding of frontend architecture, modular design, and design patterns (SOLID principles) - Experience with NPM and package management, including optimisation - Familiarity with testing frameworks and writing testable code - Working knowledge of AWS and cloud-based deployment practices - Strong understanding of JSON and API data handling, including error management - Comfortable working in cross-functional teams in an agile environment Nice to Have - Experience with performance optimisation and frontend monitoring - Familiarity with AI-assisted development tools and workflows - Previous experience working on high-traffic or conversion-focused platforms Soft Skills - Strong problem-solving ability and attention to detail - Proactive mindset with a high level of ownership - Clear communicator, comfortable working with both technical and non-technical stakeholders Additional Requirement - Native or fluent Spanish (written and spoken) is mandatory