Location: Ljubljana,Ljubljana,Slovenia
Please note that a valid student status in Slovenia is required for this position.
At Celtra, we’re leading a creative revolution. In a world where digital content consumption is skyrocketing and audience expectations evolve daily, traditional production models can no longer keep up - and that’s where we come in. Our creative solutions help media owners and operators monetize inventory more effectively, bridge the creative supply gap for brands and agencies, and deliver faster, smarter, and more personalized experiences. We’re not just keeping up with industry shifts - we’re setting the pace.
Now, we’re looking for a Software Developer Intern who will have an opportunity to work on our products, used by top companies and thousands of people on a daily basis. You will be joining one of our cross-functional teams and, with the support of our mentors, you will get your hands dirty by working on some interesting projects.
Celtra helps enterprise advertisers, media, and agencies design, approve, and deliver digital creative across the ever-growing number of campaigns, markets, designs, and variants. Celtra’s Creative Automation & Enablement Software helps brands move faster than ever while dramatically scaling content production. Companies like adidas, TripAdvisor, Spotify, Unilever, NBCU, Lululemon, YETI, Vice, and hundreds more partner with Celtra to cut production costs while increasing efficiencies and output in the cloud.
Our mission is to empower creativity - and we cannot fulfill our mission without different perspectives. Diversity drives innovation, and Celtra is committed to diversity, equity, inclusion, and belonging.
Every employee is empowered at Celtra - no matter your race, age, religion, gender identity, sexual orientation, physical or mental ability, or ethnicity. We hire the best, and develop our teams through continuous education and mentorship, in a community where everyone can bring their whole selves to work.

Celtra is dedicated to revolutionizing advertising via impactful creatives that establish memorable connections with audiences and drive measurable results. That’s why our software solutions empower marketers, media platforms, and agencies to push the limits of digital advertising by elevating creative quality, speeding up production and delivery, and boosting performance. Among our clients are some of the best global brands, such as Spotify, adidas, Unilever, Hearst, and Kargo.
Celtra is a remote-first company with more than 180 employees across the U.S. and Europe with regional hubs in New York, London, and Ljubljana. For more information, visit celtra.com.