Front-end web developer – fulltime

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With a growing team of experienced specialists we are developing -award winning- Augmented Reality applications and image based recognition technologies that result in new forms of interaction, user experience and business concepts. To strengthen our team, we are looking for a front-end web developer.

Job description

In our customer and high-end R&D projects there is often the need for a web application that co-exists with the AR mobile app. These web applications allow for content management and presentation, process workflows and online communication, often with a 3D or video component. We expect you to be experienced and enthusiastic in front-end web development and eager to create beautiful and usable web experiences that match the quality of our apps. You’ll work closely with our UX designers and AR developers, but can forge your own path with regards to frameworks and best practices. There’s still a lot of pioneering to do at TWNKLS, so plenty of challenging projects for you to work on!

Do you have a passion for web development and an interest in AR? Apply now!

Our ideal front-end web developer


Required skills and experience

  • At least 3 years of experience as Front-End Web Developer
  • Very experienced with HTML5 and CSS3
  • Good understanding of responsive design
  • Good understanding of Javascript and experience with Javascript frameworks
  • Experienced with testing and debugging cross-browser and cross-device (smart phone, tablet, eyewear and smart watch)
  • Experienced with integrating with backend services
  • Good ‘feel’ for UX and visual design with an eye for details
  • Basic knowledge of design tools like Sketch and Photoshop
  • Knowledge of the proper tools and frameworks to make your code maintainable
  • Feeling responsible to get the project completed in time
  • Good at communicating professionally both to a teammate as well as a client
  • Proficient in English

Bonus skills

  • Experience in optimizing performance for mobile devices
  • Knowledge of SEO best practices
  • Have worked in a SCRUM environment
  • Experience with developing apps for iOS or Android
  • Experience with Azure, C#, Unity, React, Angular, WebGL, WebRTC


  • Passionate about solving problems in a creative way
  • Enthusiastic about front-end web technology with an interest in AR- and mobile technology
  • Happy to work in an international multidisciplinary team
  • You know your own pitfalls
  • There is no I in team nor in TWNKLS so we are looking for a real team player
  • Humor and a positive working attitude are both a big plus
  • You know how to roll up your sleeves (yes, we’re based in Rotterdam) while making a joke

What‘s in it for you?

  • A competitive salary
  • A laptop for mobile working
  • Compensation for your private internet (home and mobile)
  • Commute by train (2nd class) will be compensated 100%
  • Compensation for a private pension plan
  • A personal training budget
  • An inspiring creative work environment next to Rotterdam Central Station


Coffee, fresh fruits and lunch are served by TWNKLS and cookies are provided by the one who is late. After the communal lunch we like to show off our table foosball skills. Don’t worry about a dress code, we think it’s more important that you feel comfortable. Most of us are officially in their thirties, but yeah… you are as old/young as you feel. In our team we speak e.g. Turkish, Portuguese, Spanish, Slovak, Bulgarian, Ukrainian, Romanian and Dutch but to actually communicate with each other, English or C# is the business language. We work in an open office in which we also collect some famous game consoles from the past. Some of us really played the Atari 2600 when they were young…

Do you want to join us? Show us your skills and motivation! Send your portfolio, resume and motivation letter (short!) to careers(at)

Responses by employment agencies are not appreciated / Acquisitie naar aanleiding van deze vacature wordt niet op prijs gesteld.


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