**Description:** ---------------- Would you like to work at a leading company in the ENERGY sector? We are a national company with significant growth, dedicated to the energy sector, both residential and commercial. We are looking for a person for the position of **Frontend Developer Senior / Semi Senior (React \+ Redux)** at our offices in FUENGIROLA. Profile: We are seeking a PROFESSIONAL with a Bachelor's degree and at least 3 years of proven experience leading or actively participating in the development of modern applications using React. It is essential that you have critical thinking, solid JavaScript fundamentals, and a clear focus on quality, scalability, and performance. The ideal candidate must master the tools of the React ecosystem, understand the reasoning behind each technical decision, and enjoy working in agile teams where technical excellence and collaboration are the norm. Technical Requirements Frontend (Mandatory)\- * Advanced experience with React, including understanding of component lifecycle and proper use of Hooks * Strong mastery of JavaScript ES6\+ and deep understanding of asynchronicity (promises, async/await, event loop). * Solid state management using Redux. * Solid knowledge of SCSS, with modular architecture and BEM principles. * Experience in Responsive Design and Pixel Perfect development. * Experience in configuration and optimization with Webpack. * Experience with automated testing using Jest (unit and integration tests). * Experience in real-time communication using Socket.IO. * Solid experience consuming and managing REST APIs. * Experience in internationalization (i18n) with react\-i18next Backend (Desirable, not mandatory) * Basic knowledge of Node.js and Express, or genuine interest in learning them. Environment and Tools * Proficiency in using bash terminal and basic Linux system administration. * Experience working with Jira and agile methodologies, especially Scrum. * Ability to understand and write clear, structured technical documentation. * Knowledge of Git and CI/CD workflows. Languages and Communication * Spanish: Native or advanced level. * English: Sufficient technical level to read documentation, understand concepts, and communicate in occasional meetings on technical topics. Best Practices and Work Style * Application of KISS, DRY, and SOLID principles. * Clean, modular, and well-documented code. * Strong commitment to project quality, maintenance, and scalability. We Value * Ability to analyze and optimize code. * Autonomy, responsibility, and attention to detail. * Genuine interest in learning new technologies and improving processes. What we offer? · * Permanent contract. * Competitive salary according to the position. * Excellent working environment. * Full-time schedule (Monday to Friday). * Growing company. * Opportunities for growth. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ COMPETENCIES Proactive individuals, committed, initiative-driven, strategic vision, versatile, problem-solving skills, effective communication, adaptability, time management, and teamwork abilities. What are you waiting for? We're looking for professionals like you! We look forward to meeting you and telling you more details. We only need your enthusiasm to work and improve.