Medior JavaScript Front-end Developer


Our team is looking for an experienced JavaScript front-end developer. Within a small team of software developers, you will be mainly responsible for the development of the management console of MailerQ, a commercial Mail Transfer Agent (MTA).

As a medior front-end developer, you play an important role within our fast-growing R&D team. You will contribute to the further development of the MailerQ management console, a real-time interface for showing delivery statistics, monitoring logs, SMTP connections, and rendering emails. Because we attach great importance to good quality code, we pay a lot of attention to the review process. As a medior you are expected to be able to critically assess both your own code and that of colleagues and then give recommendations on how to improve it.

Besides your excellent programming skills, it is important in this position that you contribute to optimizing the functionality of our products. To this end, you initiate and maintain close contact with our commercial teams so that you are well informed about the needs of our customers. Would you like to know more about how we write our code? Take a look at our open source projects on our Github.


  • You have a degree in Computer Science or related study;
  • Broad knowledge of JavaScript (ES6+); this includes knowledge of publisher/subscriber patterns, event-flow systems and object oriented programming;
  • Experience with CSS 3+ ;
  • Experience with websockets;
  • Experience with Linux;
  • You are able to work independently and tackle tasks on your own, but know when to reach out for help;
  • Excellent proficiency in English.

Nice to have:

  • Basic knowledge of SMTP;
  • Basic understanding of C++

Are you as enthusiastic about this position as we are?

Are you hard working, team-spirited and want to work inside a startup culture with the security of an established company? Feel free to send your resume and motivation to We would like to see you soon at our office in the center of Amsterdam.