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Back End Node Js Developer

Fusion Consulting


Job Location:

Barcelona - Spain

Monthly Salary: Not provided by the employer
Posted: 5 November 2026 (13 hours ago)
Application Deadline: 2 February 2027
Vacancies: 1 Vacancy

Job Summary

Were looking for a detail-oriented and analytical Back End Developer to join our growing engineering team in Barcelona this role you will design develop and maintain robust server-side applications using 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 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 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. 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 learningfor 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. Lets shape the future togetherhow far will you take yourself with Fusion Consulting 
  • Annual Training Budget: You will receive 1500 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


Remote Work :

No


Employment Type :

Full-time


About Company

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 em ... View more

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