Senior Backend Engineer Javascript/Node.js

Preferable Location: Porto, Aveiro   |   Full Time

We are 25Friday! 

Our world-class Technology team is at the core of what we do - help digital start-ups and scale-ups succeed. Split across 2 main offices - Netherlands and Portugal (Porto), 25Friday helps start-ups deliver their product meaning that we are the business and technology partner to support start-ups in the whole cycle of online product management.

We do cool stuff - you will get the opportunity to work on new business ideas and work on greenfield products!

No need for bureaucracy or tiring processes, we work according to the way the team works the best. We always keep in mind that quality and agility are the most important drivers for our work.


We are looking for a Senior Backend Engineer (Node.js) who is motivated to develop smart solutions using state-of-the-art technologies. You will integrate an extremely friendly, motivated and talented group. If you love to learn, if you are willing to share knowledge and are keen to be part of a building process to reach the top, then this is an opportunity you can’t miss.

Who you are:

  • 5+ years of experience in building scalable distributed production software

  • Rich hands-on programming experience in Node.js, using the best practices.

  • 2+ years of web application code design and architecture

  • Vanilla JavaScript and/or TypeScript on the back end (Node.js, Firebase, etc.);

  • Developing performant, resilient and secure services/functions;

  • Protocols and architectural patterns like HTTP, REST and/or GraphQL and Microservices;

  • Strongly experienced in React.js development;

  • Being passionate, self-driven and working with little supervision towards a common team or company purpose

  • Proficient in one or more version control software platforms (e.g. Git, Subversion, Mercurial)

  • Expert knowledge in performance, scalability, enterprise system architecture.

  • Knowledge of usability principles, cross-browser compatibility, and HTML document architecture

  • Knowledge of Continuous Integration and Continuous Deployment

  • Ability to work with various stakeholders from the Netherlands and Porto so your communication skills need to be awesome

Why you’ll love to work with us:

  • In the heart of the city of Porto, you will have an awesome office with private parking that we see as a second home, although currently, anyone that wants to work remotely is free to do so!

  • You will live our culture of learning - we are committed to your development so we love to share and learn with each other

  • You will emerge in a state of the art technology and exciting challenges

  • We believe in friendships and relationships that’s why we organize team outings and happy hours

  • We believe we are at our best when you are at yours, so you will have access to health insurance, personal time off and flexible working hours

When you join 25Friday you will see that success is contagious - we can’t wait to celebrate it with you!

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