Principal AI Engineer

We’re looking for a Principal AI engineer who can design, build, and scale AI systems end-to-end, while taking ownership of architectural decisions and contributing to the company’s overall AI strategy.

• Define and drive AI architecture and strategy across one or more of our ventures
• Design and build AI systems end-to-end (from prototype to production)
• Architect AI services that integrate seamlessly with our backend systems (primarily Node.js/TypeScript)
• Evaluate new models, tools, and frameworks and decide what's worth adopting
• Collaborate closely with a small, high-performing cross-functional team to ship AI-first features
• Ensure scalability, reliability, security, and cost-efficiency of AI solutions
• Operate with high ownership and autonomy in technical decision-making
• Mentor engineers and raise the overall AI expertise within the company
• 7+ years in software engineering, with at least 3 years focused on AI/ML systems
• Proven experience designing and deploying production-grade AI solutions
• Strong understanding of LLM-based systems — RAG, agents, fine-tuning, evaluation frameworks
• Hands‑on with Python and AI/ML tooling (PyTorch, Hugging Face, LangChain, or similar)
• Working experience with Node.js/TypeScript (our core backend stack)
• Solid grasp of embeddings, vector databases, retrieval systems, and data pipelines
• Experience exposing AI services via REST or GraphQL APIs
• Cloud infrastructure experience (AWS, GCP, or Azure)
• Strong system design skills and the ability to translate business problems into robust AI solutions
• Experience mentoring engineers and leading technical decisions
• Experience building AI‑native products from scratch
• Familiarity with multi‑agent systems and MLOps practices
• Track record of optimizing model performance, latency, and cost
• Startup or venture‑building experience

What's in it for you

• Competitive compensation aligned with your experience and the market
• High‑impact role with direct influence on product and AI strategy
• Home office budget
• 100% covered sick leave
• Remote, hybrid, or office — your call
• Paid parking or public transport
• Free breakfast, lunch, snacks, coffee, and drinks in the office
• Multisport card (50% co‑funded)
• Additional perks and benefits

Apply for this position

We’re a multilingual company, but English is our official language for all communication. Please complete your application in English. Depending on your background, parts of the selection process may also take place in Croatian or German to help you fully express yourself.

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