Coolblue logo

Medior Front-end Developer






About Coolblue

Who we are

Coolblue is one of the largest online shops in the Netherlands & Belgium and has only one goal: making customers smile. Some smiles come easily, some take a little extra effort, but at Coolblue it's all in the details. We charge no shipping costs for our orders. We send our customers a text message as soon as their order has been packed and shipped. We answer all questions on social media within 30 minutes. Making customers happy is in our DNA.

Our people

In the last 20 years, Coolblue has grown into a company employing over 3500 enthusiasts, who generate an annual turnover of over a billion Euros. Coolblue people are young – 28 years on average – extremely motivated and frankly, a bit unconventional. Struck with a good idea? We will give you the means and the opportunity to work on it. Based in our head office in Rotterdam, we work hard in small teams to improve our processes. Just a little better, every single day.

Our history

Coolblue was created in 1999 by Pieter, Paul & Bart, in a bar in Rotterdam. Three Business students who were fond of MP3 players decided to start their own web shop, with two goals in mind: to become millionaires and to create a company that other companies set a new standard in customer service. Within a couple of years, Coolblue has turned into an award-winning company, praised for its surprising ways of amazing customers with our obsessive focus on service.

Development at Coolblue

Over time we have learned that being successful as a company is not possible without smart IT. Our developers have one thing in common: they work hard to deliver value to our customers.

At Coolblue we don’t outsource our solutions if they provide us with a competitive advantage. Therefore, we keep all of our important processes in-house, and when you work for us, you’ll have the opportunity to personally make our logistics, our stores, our web shops and our financial processes even better.

We work in Scrum teams to ensure constant feedback and improvement and we aim to deliver new improvements daily.

What our developers love at Coolblue:

  • Besides their own specialization, they make fast progress in becoming all-round developers. 
  • Defining their own priorities and directly receiving feedback from users.
  • There is room to experiment. 
  • Using the right tool for the job.
  • The fact that we always have a budget available for great ideas.


As a medior Front-End Developer at Coolblue you improve the user-friendliness of our webshop for millions of customers.

How do I become a Medior Front-end Developer at Coolblue?

As a Medior Front-end Developer you work on the user-friendliness of our webshop for millions of customers. You enjoy working with the UX designer to pick up stories. You get energy from coming up with creative solutions and are happy to present this within the team. You are also proud of your work and welcome all feedback. "Want to become a Medior Front-end Developer at Coolblue? Else de Boer explains how to do that. "

You enjoy doing this

  • Improving the user-friendliness of our webshop for millions of customers.
  • Thinking about technical choices, such as our architecture, tools and processes.
  • Keeping an eye on the performance of the webshop and analyze how you can improve it.
  • Colleagues and yourself help through pull requests, code reviewing and pair programming.
  • Making our webshop even a little bit better every day.

You recognize yourself in the following

  • You have a BSc or MSc in for example Computer Science. 
  • You have between 3-5 years of experience as a Front end Developer.
  • Strong experience with modern JavaScript (ES2017), HTML, CSS/SCSS, REACT as a framework and composition.
  • Experience with one or more modern JavaScript frameworks.
  • Experience in one or more server side languages such as PHP or C#.
  • Enforce code quality through Test Driven Development and linting.
  • Working in a fast paced Continuous Integration & Deployment environment gets you excited.
  • You're self-learning, independent, and have excellent problem-solving skills.
  • Working with Scrum/Agile working is second nature to you.
  • You know how Git works.
  • You're proud of your work and welcome all feedback.
  • You're fluent in English and have a European passport and/or live in the EU

This is what you're looking for in a job

  • Money.
  • Over 30 training courses at our own Coolblue University.
  • An awesome workplace. With freshly prepared meals, monthly TGIF drinks, epic Coolblue parties, and an informal, playful office space.
  • 25 leave days. As long as you'll promise to come back.
  • Travel allowance and a retirement plan.
  • An office at the best possible location. It's only a short stumble away from Rotterdam Central Station. Or a 2-minute walk.
  • Relocation assistance, from a to z (Only if you have a European passport or live in EU)
  • Dutch language courses. To help you become a Rotterdammert.
  • An international work environment. With colleagues from places like Belgium, Spain, Australia, Mexico, and Italy.