Position: Node.js Senior Developer (Barcelona)

We're expanding our team in Spain - come and join us! 


Position: Node.js Senior Developer (Barcelona)

  • Location : Barcelona
  • Duration : indefinite, permanent
  • Experience : 4+ years as programmer of which 2+ years server-side nodejs.

Job Description

We are looking for a great senior Node.js developer. Your primary focus will be on designing and implementing world-class components for improving our IoT/AI TrackSphere solution.

You will ensure that these components and the overall application perform and scale, are robust, and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important.


  • Reviewing functional and performance requirements; work with other team members.
  • Lead and contribute to the design the architecture of the solution and of individual components and microservices, class design.
  • Write adequate test suites.
  • Translating designs and into high quality code.
  • Building highly testable and reusable components for future use.
  • Optimising components for maximum performance, robustness and scalability.


  • Strong proficiency in nodejs, including DOM manipulation and the JavaScript object model and single page applications.
  • Thorough understanding of React.js and its core principles.
  • Experience with Node.js.
  • Experience with popular React.js workflows (such as Flux or Redux).
  • Familiarity with newer specifications of EcmaScript.
  • Experience with data structure libraries (e.g., Immutable.js).
  • Familiarity with RESTful APIs.
  • Knowledge of modern authorization mechanisms, such as JSON Web Token.
  • Familiarity with modern front-end build pipelines and tools.
  • Experience with common front-end development tools such as Babel, Webpack, NPM, yarn, etc.
  • A knack for benchmarking and optimization.
  • Familiarity with code versioning git tool.
  • Familiarity with web sockets, socket.io, jQuery.
  • Basic knowledge of SQL (PostgreSQL).
  • Familiarity with mqtt, amqp, and other messaging protocols.
  • Computer Science or equivalent degree.
  • Fluent in English; a second or third Language a plus.

What we offer

  • Startup environment, but part of a great and big group.
  • Mixed remote/on-site.
  • Time and budget for training.
  • Competitive salary

Apply Now

If you feel you have the right skills, experience and can-do attitude to fulfil this role please complete the form below. No agencies please!

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