Job Summary: We are looking for a Senior/Semi-Senior Frontend Developer for a leading company in the energy sector, focused on quality, scalability, and performance using React and Redux. Key Highlights: 1. A leading company in the energy sector with strong growth. 2. An excellent working environment and opportunities for career advancement. 3. Agile teamwork with technical excellence and collaboration. **Description:** ---------------- Would you like to work for a leading company in the ENERGY sector? We are a national company experiencing significant growth, operating in the energy sector for both residential and commercial clients. We are seeking a candidate for the position of **Senior / Semi-Senior Frontend Developer (React \+ Redux)** at our offices in FUENGIROLA. Profile: We seek a PROFESSIONAL holding a Bachelor’s degree and possessing at least 5 years of verifiable experience leading or actively participating in developing modern applications using React. Critical thinking, solid JavaScript fundamentals, and a clear focus on quality, scalability, and performance are required. The ideal candidate must master React ecosystem tools, understand the rationale behind each technical decision, and enjoy working within 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 command of JavaScript ES6\+ and deep understanding of asynchrony (promises, async/await, event loop). * Solid proficiency in managing global state with Redux. * Strong knowledge of SCSS, including modular architecture and BEM principles. * Experience in Responsive Design and Pixel Perfect development. * Experience in Webpack configuration and optimization. * Experience in automated testing using Jest (unit and integration tests). * Experience in real-time communication via Socket.IO. * Solid experience consuming and managing REST APIs. * Experience in internationalization (i18n) using react\-i18next. Backend (Desirable, not mandatory) * Basic knowledge of Node.js and Express, or genuine interest in learning them. Environment and Tools: * Proficiency 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 during occasional technical meetings. Best Practices and Work Style: * Application of KISS, DRY, and SOLID principles. * Clean, modular, and well-documented code. * Strong commitment to project quality, maintainability, 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 commensurate with the position. * Excellent working environment. * Full-time schedule (Monday to Friday). * A rapidly expanding company. * Opportunities for career growth. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ COMPETENCIES Proactive, committed individuals with initiative, strategic vision, versatility, problem-solving skills, effective communication, adaptability, time management, and ability to work collaboratively in teams. What are you waiting for? We’re looking for professionals like you! We look forward to meeting you and providing further details. All we need is your motivation to work and to excel.