Senior JavaScript Developer @ Efficy in Brussels, Netherlands (‘S-Hertogenbosch)


+32 2 648 18 98

To apply for this job please visit

Experienced JavaScript Developer to join a highly engaged and motivated team and ensure our existing customers get the most of our products and services!

Large company with close relations

Efficy has a vision to become the leading CRM provider in Europe, and with more than 300,000 users we are getting closer every day. In Efficy two days are rarely the same, and things are changing rapidly. So, fasten your seat belt, and join us on the journey.

We really want our employees to thrive in their daily life, and therefore you can expect online music quizzes, onsite ping-pong tournaments, and lots of more. The communication is informal, and your colleagues are only a short call away. You will have more than 500 colleagues placed in Belgium, France, Spain, the Netherlands, Sweden, Denmark, Finland, Norway, Hong Kong and a few remote.

As the leading provider of CRM and Digital Marketing solutions in Europe, our goal is to enable and simplify the workloads of our many global clients every day.

Your mission

As said, no project is the same! This means that you are working on multiple projects at the same time with your team.

  • Programming based on functional analysis
  • Unit testing of own code
  • Writing technical specifications/documentation if needed
  • Configuration of the application on client’s servers
  • Application database configuration
  • Assist to technical meetings with the client if required

About YOU

At Efficy we are proud of our company culture that creates openness and honesty between us, and it is extremely important that all employees as well as managers take pride in ensuring that we constantly live up to our values of putting people first, taking ownership and ensure efficiency in the daily work.

More specifically:

  • You have a bachelor or master’s degree in IT and/or relevant experience
  • 3+ years experience in a similar position
  • You’re motivated and a team player
  • You are solution-oriented
  • Knowledge of CRM, accounting and business systems is an asset
  • Native in French or Dutch
  • Good command of English our corporate language

Technical qualifications:

  • Back- and frontend web development
  • JavaScript, TypeScript
  • Vue.js ecosystem
  • SQL
  • HTML, CSS, Sass
  • Browser debugging, experience troubleshooting cross-browser compatibility issues
  • Server-side debugging

LOCATION: This position can be based in Brussels (Belgium) or ‘s Hertogenbosch (The Netherlands). 

We offer you:

  • A competitive salary package with a bonus system and a referral program
  • A stable and growing company with an entrepreneurial mindset where we will listen to your ideas and support you to make it happens
  • High flexibility and hybrid work is part of our DNA
  • State of the art offices with our unique co-living-co-working concept where teamwork is the norm
  • International growing opportunities and internal mobility
  • Events: team lunches, after works, sport, trips
  • Learning opportunities: languages, tech, product, sales techniques, leadership

Position type

Full time


Efficy is not accepting unsolicited assistance from search firms for this employment opportunity. Please, no phone calls or emails. All resumes submitted by search firms to any employee at Efficy via-email, the Internet or in any form and/or method without a valid written search agreement in place for this position will be deemed the sole property of Efficy. No fee will be paid in the event the candidate is hired by Efficy as a result of an unsolicited referral or through other means.