Data Scientist

Your Role As our Marketing Engineer, you sit at the intersection of data science and paid media. You'll consolidate scattered customer signals into a single source of truth, build ML models that score leads by their real value, and feed those insights back into our ad platforms - making our marketing smarter than the platforms' out-of-the-box optimization. It's a hands-on, build-from-scratch role with full ownership over both the models and the impact they create. What to expect * Build our predictive CLTV modelling from the ground up: consolidate customer signals into a database, develop ML models on user behavior to score leads * Feed those scores back into the ad platforms (Meta, Google, and more) to sharpen targeting and bidding * Own tracking and conversion infrastructure: Tag Manager, Search Console, offline uploads, server-side setups * Turn raw behavioral data into measurable performance impact * Work closely with the Performance Marketing team and Go-to-Market managers Who We're Looking For * You're comfortable building data pipelines and ML models - Python, SQL, and modern ML tooling are second nature * You understand paid media well enough to know what signals matter and how platforms consume them * Experience with attribution, conversion APIs, or offline conversion uploads is a strong plus * Hardworking, analytical, structured, and a natural fit for a direct, ambitious culture * Strong English skills, as English is our company language * German skills are a big plus What We Offer * Competitive Salary: €65.000-€130.000 * Equity - you build it, you should own a piece of it. * Food & drinks - at our Vienna office, lunch and dinner are on us (plus all the drinks your heart desires, and yes, we have protein bars and vitamins too). * Relocation bonus (if you still need to move to Vienna) * Equipment of your choice - whatever makes you happy. * Regular team offsites. Hiring Process * 15 min intro call * 30 min skill interview * 15 min Culture fit with the founders https://www.fonio.ai/en/careers/?ashby_location_id=18386194-f012-4992-827f-51d91e785ada&ashby_jid=38f9b87f-319a-4a3d-ac02-5fd16aad318d#open-roles