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.

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📌 Senior Experimentation Analyst (Barcelona)
🏢 Jobtailor
📍 Barcelona