Senior Experimentation Analyst

Jobtailor; Barcelona; Presencial; EUR 70.000 - 100.000; Jornada completa

Descripción de la vacante

Jobtailor is seeking a data-driven analytics professional in Barcelona to own experiments end-to-end and translate findings into actionable insights. You will design tests, measure outcomes, and socialize results across teams, including cross-channel initiatives.

You will advance our measurement framework, calibrate attribution, and raise the bar for experimentation cadence. Strong SQL plus Python or R skills are essential, with experience communicating complex analyses to both technical and

Formación

• 3+ years using data to drive business impact, with cross-functional partnership.
• Strong SQL, including complex queries on large datasets.
• Statistical grounding with Python or R; hypothesis testing and regression.
• Proven experience owning end-to-end A/B testing.
• Curiosity about measurement problems and comfortable with ambiguity.
• Clear communicator to both technical and non-technical audiences.

Responsabilidades

• Own experiments end-to-end from scoping to socializing results.
• Advance measurement framework with incrementality, holdouts, attribution.
• Scale testing cadence and design across marketing functions.
• Write SQL against large event-based datasets.
• Connect experiment results to demand- and supply-side dynamics in a two-sided marketplace.
• Present clear narratives to decision-makers.

Conocimientos

Data-driven analysis

SQL proficiency

Python or R

A/B testing ownership

Cross-functional collaboration

Communication skills

Descripción del empleo

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.