Founding Analytics Engineer
Confirmed on the employer's own hiring board on Oct 29, 2026. First seen by Alion on Sep 1, 2026. fonio scores B on the Alion truth index.
About fonio
We grew from $1M to $10M ARR in under 12 months and now serve 10,000+ customers.
Fonio is Europe’s market leader for AI phone agents for SMBs. Now we’re expanding globally and into new products.
We move fast, take ownership, give direct feedback, and avoid politics and unnecessary meetings.
Join one of Europe’s fastest-growing companies.
Your Role
Build and own Fonio’s data foundation, from the raw data to the models.
Combine data from our own systems and third-party tools in one warehouse.
Build the models the business runs on, starting with CLTV.
Make the data easy for anyone in the company to use, and make sure everyone gets the same answer.
What to expect
Set up and run the data warehouse (e.g. Snowflake) using off-the-shelf tools: buy the plumbing, build the models.
Build and maintain ETL and reverse-ETL pipelines, choosing cost-effective tools (e.g. Weld over Fivetran).
Own the modelling layer in dbt (or similar), and automate as much as possible.
Build a cohort-based CLTV model first, then other core models such as retention and payback.
Define the key metrics (CAC, CLTV, churn, activation) once, and document them as the single source of truth.
Open the warehouse to the team so anyone can query it and build dashboards with Claude, with the right access controls in place.
Set up data tests and monitoring so people can trust the numbers.
Work closely with the founders and the marketing team, turning business questions into models.
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
Fluent in English (as this is our business language)
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
20 min intro call
Case Study
30 min skill interview
20 min culture call