Frontend Engineer Intern

Ljubljana, Slovenia | Product Development | Full-time | Partially remote


We are looking for an engineer intern that will get involved in building our design system, rich UI experiences and family of single-page applications (SPA). Example of such an application is our content editor, which you can imagine as something like Photoshop, just that it runs in the browser and produces massive amounts of videos, images and HTML. SPAs are built mainly in Vue.js, but if we have to, we are not afraid to use vanilla JavaScript too.

Your responsibilities

  • Developing the front-end of new functionalities in our applications.
  • Participating in revamping the client-side app architecture.
  • Participating in the redesign of the product frontend.
  • Making sure we maintain a high level of quality by writing automated tests.


  • Basic knowledge of modern web technologies, with a focus on Javascript, CSS and HTML
  • Good general programming knowledge and understanding of modern software development processes
  • You are truly interested in how things work and are always willing to dig deeper.
  • Good verbal and written English communication skills.
  • Willingness to constantly learn and improve.
  • Team player.

What we do 

In the past years Celtra has built two world-class products, Creative Enablement (CE) & Creative Automation (CA)

Creative Enablement is already a growing market leader for a couple of years, helping companies such as CNN, TripAdvisor, Bloomberg, NBCU, ... to enable creativity and improve the quality of their advertising inventory. Our technology enables customers to generate and serve thousands of ads in seconds.

Celtra’s younger CA product is chasing a much bigger opportunity by helping brands make content creation better, faster, and more efficient. It is still in the early days of development and lots of features need to be developed, but it already has an impressive list of customers such as Spotify, adidas, Shopify, Unilever, P&G Lululemon…

At Celtra the end goal is to build great and quality products and make our users’ life easier. We’re on a journey to create something new in the creative technology space.  

What we offer 

In Celtra it’s all about looking beyond the surface, beyond the numbers, and really trying to see the qualities that are at the core of each person, their talents; the discovered ones or better still, the undiscovered ones. We look for people who naturally want to take responsibility for their own success, and strive to do something that has a tangible impact. 

To our best talent, we give the freedom to do the unusual. 

Our perks and benefits are: 

  • We have a remote-first culture with a possibility to work from the office that offer a dynamic workplace and quality working conditions 
  • We provide plenty of opportunities for interns to grow and develop  
  • We offer a well paid internship
  • We provide employees with top notch working equipment 
  • We provide work-life benefits that allow flexibility at different stages of life