Job Summary: We are seeking a Full Stack Developer to join a team in Barcelona, developing user interfaces and server-side logic, ensuring code quality, and collaborating with design and product teams. Key Highlights: 1. Development of intuitive user interfaces with React and JavaScript. 2. Implementation and maintenance of server-side logic with PHP. 3. Opportunity for professional growth in a leading technology company. DESCRIPTION At BESIDE, we champion top talent within the technology sector. We have a specialized Recruitment Unit focused on Engineering profiles to integrate candidates into our clients’ teams. We work with a broad range of companies, enabling us to match you with the position best suited to your professional needs and interests. You will join some of the most innovative companies, undertaking cutting-edge projects across R\+D, automotive, pharma, machinery design, product development, etc. We are looking for a Full Stack Developer to expand one of our teams in Barcelona. **Responsibilities:** * Develop intuitive and efficient user interfaces using **React and JavaScript.** * Implement and maintain server-side logic using **PHP.** * Ensure code quality through writing and executing **unit tests.** * Collaborate closely with design and product teams to translate requirements into robust technical solutions. * Participate in all phases of the software development lifecycle, from conception to deployment. * Identify and resolve technical issues, optimizing application performance. * Contribute to the development of small software components in Node.js. * Demonstrate interest and willingness to learn and apply Kotlin in multi-platform platform development. * Stay up to date with the latest trends and technologies in full\-stack development. If you seek a dynamic work environment, challenging projects, and the opportunity to grow professionally within a leading technology company, we want to meet you! REQUIREMENTS * Proven experience of at least 5\-6 years as a Full Stack Developer with **PHP/React (front\-end focused)** * Advanced proficiency in **React** and JavaScript. * Solid backend development experience with **PHP.** * Demonstrated experience in **implementing unit tests.** * Knowledge of agile development methodologies. * Excellent communication and problem-solving skills. Preferred qualifications: * Experience with Node.js. * Knowledge of or demonstrable interest in Kotlin and multi-platform development. * Familiarity with relational and NoSQL databases. * Experience with version control tools such as Git. * Knowledge of microservice architectures.