Location: Ljubljana,Ljubljana,Slovenia
Please note that a valid student status in Slovenia is required for this position.
Ever wonder how Spotify creates ads that look as stunning in English as in Arabic? How Adidas generates beautifully crafted dynamic creatives for tens of thousands of products? Or how Warner Bros shows billions of ads across the globe on mobile phones, websites, and even TV within milliseconds? The software we create here at Celtra makes this as easy as pie, and we need your help!
We are seeking a Software Developer & ML Researcher Intern who will work on developing our AI features, designed to streamline creative processes, as well as develop and enhance machine learning models that boost client's ad performance on the Celtra platform. With some prior knowledge of machine learning, this role will primarily focus on implementing and integrating cutting-edge AI models into real-world applications. It involves working with bleeding-edge technologies, fine-tuning models to improve performance, and developing features powered by these models. The role also includes a component of research and staying up to date with the latest advancements in the field.
We work with a variety of tools and technologies to build our products. On the backend, you’ll find NodeJS, PHP, MySQL, Snowflake, and occasionally Go. Our frontend is built with Vue.js and TypeScript. Everything runs on AWS/ECS, and we’re big on CI/CD, IaC, and daily deployments.
We also actively embrace AI-assisted development (“vibe coding”) in our workflows, using tools like Cursor to boost productivity, speed up iteration, and explore new ways of building software.
About Celtra
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 for 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.
Empowering Creativity through Diversity & Inclusion
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.
