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 (Cataluña)
🏢 Jobtailor
📍 Cataluña