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Frontend Developer

Improve the user-friendliness of our webshop for millions of customers.

    Pros and cons

    Improve the user-friendliness of our webshop for millions of customers.
    Objectively consider technical choices, such as our architecture, tools, and processes, and don't cling too tightly to previously made choices or existing information.
    Actively coach your fellow developers and continuously provide them with constructive feedback.
    Keep an eye on the performance of the webshop and analyze how you can improve this.
    You have to choose between playing foosball, table tennis or pool, every day.



    'Good Morning!' Today is the start of a new sprint, in which you and your team will continue work on new search functionality. Together with a UX Designer, the team discusses how to approach the first story. After pairing up with the PHP Developer to make sure the right data is available, you stop to mentor a Junior Front-end Developer in your team. They need help setting up semantically correct HTML, structured CSS, and Google-friendly JavaScript. Later in the day, you review their Pull Request and see how they did and provide constructive feedback.

    Looking at your calendar, it appears a meeting is planned later with a couple of enthusiastic developers from another development team attempting to reduce the Time To First Byte by 20%. Of course you have some great ideas, with some extra time you are able to put together a proof of concept. At the meeting you proceed to demo your ideas and collaborate with the other team on several different approaches to improve our customer experience.

    Your specifications

    • 3+ years of Web Development experience, preferably in an agile environment.
    • Strong experience with modern JavaScript (ES2017), HTML, CSS/SCSS and composition.
    • Experience with one or more modern JavaScript frameworks.
    • Experience in one or more server side languages such as PHP or C#.
    • Working in a fast paced Continuous Integration & Deployment environment gets you excited.
    • Enforce code quality through Test Driven Development and linting.
    • You understand version control systems, especially Git(hub).
    • You're self-learning, independent, and have excellent problem-solving skills.
    • Comfortable coaching and mentoring less experienced developers.
    • Written and verbal communication skills are great.
    • You're fluent in English.



    Included by default


    • 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 (if you live abroad).

    • Dutch language courses. To help you become a Rotterdammert.

    • An international work environment. With colleagues from places like Belgium, Spain, Australia, Mexico, and Italy.


    Questions about Software development vacancies?

    Questions about Software development vacancies?

    Else Else de Boer

    Application process

    1. Apply
    You've applied? Awesome. We'll get back to you as soon as possible.
    2. Introductory call
    One of our Recruiters will call you for a preliminary chat.
    3. First interview
    A Recruiter and a Developer will call you for a Skype interview to get to know you better and to answer any questions you might have.
    4. Meet & Greet
    If you live outside NL we'll fly you in to meet us, so we can show you your future workplace.
    5. Offer
    We'll make you an offer you can't refuse.
    6. Hired
    Just sign here, here, and here. Booyah! You're hired.

    Apply for this job

    Apply now if you're interested in this vacancy! Make sure you have the following documents ready to add to your application.

    • CV
    • Cover letter

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