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.

In bullet points this means:

  • 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++

What do we have to offer?

We offer you an excellent salary and we fully reimburse your travel expenses. We have spacious workplaces and one of the best views of Amsterdam. Furthermore, we have legendary company trips and events and last but not least a magnificent and well-stocked sky bar.

  • Competitive base salary;
  • Equity participation scheme;
  • Support and time to develop your own ideas and projects;
  • An international team of young professionals;
  • Friday beer at our own open bar, with a great view over Amsterdam.

Our office is a five minutes walk from Amsterdam CS.

About MailerQ

MailerQ is a high performance mail transfer agent (MTA) built in Amsterdam by Copernica. MailerQ is used by email service providers (ESPs) and large email senders all over the world as a core part of their sending infrastructure.

Other than more old-fashioned MTAs MailerQ relies on memory and an industry standard open source message broker called RabbitMQ. This makes it blazingly fast and highly flexible. Setting up MailerQ is easy and fast because of its intuitive management console. Feel free to try for yourself by signing up for a free trial.

Copernica, the company behind MailerQ, is a mature organization. That gives a lot of security compared to a normal startup. Yet Copernica never left that startup culture and is still very flexible and informal. The MailerQ team is one of the youngest teams inside Copernica. The product is taking off and we are looking to expand our teams in both development and sales.

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.