Responsibilities

- Own experiments end-to-end. From scoping the hypothesis and picking the right measurement, to running the analysis, to writing up and socializing the result — including harder cross-channel and retargeting tests where the measurement isn't obvious.
- Advance our measurement framework. Lead incrementality work, stratified holdouts, and attribution‐calibration refinement, and help figure out what comes next when our holdout strategy hits its limits.
- Scale how we test. Raise the bar on experimental design, sample‐size rigor, and our testing cadence across marketing functions.
- Write SQL against large event‐based datasets and pressure‐test analytical approaches across the team.
- Root‐cause the metrics, connecting experiment results to demand‐and supply‐side dynamics in a two‐sided marketplace, and bring a clear narrative to decision‐makers.

Requirements




- 3+ years using data to drive business impact, including partnering cross‐functionally to act on findings.
- Strong SQL, including complex queries on large datasets and reviewing others' code.
- Solid statistical grounding with Python or R — hypothesis testing, regression, sample size — and a feel for the trade‐offs between measurement approaches.
- Proven experience owning A/B testing end‐to‐end: design, sample size, analysis, and write‐up.
- Genuine curiosity about measurement problems and comfort sitting with ambiguity while you work them out.
- A clear communicator who makes complex analysis land with technical and non‐technical audiences.

📌 Senior Experimentation Analyst (Barcelona)
🏢 Jobtailor
📍 Barcelona