Back End Node Js Developer

Employment: Full-time Experience level: Mid-Senior Level Job Description We're looking for a detail-oriented and analytical Back End Node.js Developer to join our growing engineering team in Barcelona, Spain. In this role, you will design, develop, and maintain robust server-side applications using Node.js, working collaboratively with cross-functional teams to deliver scalable and efficient solutions. The ideal candidate will demonstrate strong problem-solving abilities and a commitment to writing clean, well-organized code that meets our high standards for quality and performance. Develop and maintain back-end services and APIs using Node.js and JavaScript, ensuring optimal performance and reliability Design and implement efficient database solutions, including schema design and query optimization Write clean, maintainable code following established coding standards and best practices Collaborate with front-end developers, product managers, and other stakeholders to understand requirements and deliver integrated solutions Conduct code reviews and provide constructive feedback to team members to maintain code quality Troubleshoot, debug, and resolve technical issues in a systematic and organized manner Implement and maintain automated testing frameworks to ensure application stability and reduce bugs Participate in system architecture discussions and contribute to technical decision-making Monitor application performance and implement optimizations to enhance efficiency Document code, APIs, and technical processes for team knowledge sharing and future reference Qualifications **Required Skills and Experience:** Proficiency in Node.js and JavaScript with demonstrated experience building production-level applications Strong understanding of RESTful API design and implementation Experience with relational and/or NoSQL databases (e.g., PostgreSQL, MongoDB, MySQL) Solid knowledge of version control systems, particularly Git Experience with asynchronous programming and event-driven architecture Familiarity with server-side frameworks and libraries (e.g., Express.js, Fastify) Understanding of software development best practices and design patterns Proven ability to write organized, efficient, and well-documented code **Preferred Skills and Experience:** Experience with TypeScript for type-safe development Knowledge of microservices architecture and distributed systems Familiarity with containerization tools such as Docker Experience with testing frameworks and test-driven development (TDD) Understanding of CI/CD pipelines and deployment processes Experience with cloud platforms (e.g., AWS, Google Cloud, Azure) Knowledge of message queues and event streaming (e.g., RabbitMQ, Kafka) Experience with performance monitoring and logging tools Additional Information At Fusion, we unite entrepreneurial minds from around the globe to develop and implement game-changing solutions that build lasting relationships with our clients. We value employees who challenge the status quo through innovation, adapt to diverse client needs in ever-changing environments, and commit to continuous learning—for themselves and their colleagues. Why Fusion?  We provide a competitive salary and benefits package, along with an outstanding work environment that fosters long-term career development opportunities. Our Benefits: Workflex : Enjoy 25 working days off annually, giving you the flexibility to work from your preferred global location.  Flexible Time Off : Take time off as needed to recharge and maintain a healthy work-life balance. Let’s shape the future together—how far will you take yourself with Fusion Consulting?  Annual Training Budget : You will receive 1,500 CHF to support your professional development.  Unity Scheme : Benefit from loyalty rewards starting after 3 years of service. At Fusion Consulting, your growth has no limits. How far will you go? Company Description Swiss Delivery Excellence: Transforming Life Science Consulting Worldwide. Fusion Consulting is a globally leading Business and IT boutique consultancy specialized in the Life Sciences industry, partnering with leading companies in pharma, healthcare, and animal health. With over 450 employees and 25 offices worldwide, our mission is to revolutionize our clients' business transformation challenges and set new industry standards through innovative solutions. Focused on S4HANA, Data & Cloud, and innovative technologies, Fusion Consulting brings unparalleled expertise and commitment to excellence to every project we undertake. Grounded in our commitment to fast and intelligent decision-making, our client-first and open-hearted approach defines our ethos. With unwavering support and an entrepreneurial spirit, our global teamwork transcends boundaries and turns shared visions into reality.