Software Developer - Mid / Senior
About this role
Location: Ljubljana,Ljubljana,Slovenia
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!
Your responsibilities:
• Executing complex projects, doing deep and delicate code surgery as needed. • Preparing clear and concise tech specs for complex features. • Independently driving a full product cycle for features and improvements. • Optimizing architecture for maintainability, composability, etc. • Delegating and supervising smaller tasks.
What tools do we use?
On the frontend, we use Vue.js, Typescript and Vanilla JS when needed. On the backend, you can find Scala, NodeJS, PHP, MySQL, Spark, Snowflake, and also MongoDB, Kinesis. Everything runs on the AWS cloud, and the ECS cluster orchestrates it. We also love CI/CD, IaC and do daily deployments to ensure your contributions see the light of day as soon as the QA team is happy.
We also actively embrace AI-assisted development with Cursor to boost productivity, iterate on PoCs and explore new ways of building software.
You will thrive in this position if you have:
• At least 2-4 years of experience in a similar position, programming and following modern software development processes. • Experience with modern web technologies (Javascript, TypeScript, CSS, HTML) and frameworks (VueJS / React / Angular). • Experience with back-end technologies (PHP / Golang, etc.). • Have a genuine interest in AI/ML (models, agents, ...) and exploring new technologies. • Be proactive, analytical, a good communicator and a team player. • Have a product mindset.
Why Celtra?
• Impact: Shape the future of creative and help solve some of the biggest challenges ad tech is facing today. • Culture: We're bold, collaborative, and proudly a little bit quirky - because doing great work should also be fun. • Growth: Work with some of the sharpest minds in creative tech, tackle new challenges, and grow faster than you thought possible.
What do we offer?
• Flexible working hours and hybrid work based on a fixed number of in-office days. • A dedicated educational budget to explore new skills and deepen your expertise. • Equipment of your choice. • Knowledge shares. • Additional pension and health insurance. • WFH budget. An additional budget of 500 EUR to set up your home space. • Employee well-being. Dedicated budget for any kind of wellness activities such as fitness, yoga, etc.