Wallapop operates in Spain, Italy and Portugal, offering a catalogue of several hundreds of millions of products and services. Powered by technical innovation and continuous improvement, we bring together the scale & trust of classifieds with the marketplace’s convenience & reach. Our mission is to enable a connected trade ecosystem, making 2nd-hand the norm through smart use of technology.This person will define the company's experimentation standards, improve statistical rigor, increase the speed and quality of product decisions, and help Product teams adopt a culture of evidence-based decision making.You will partner closely with Product, Engineering, Data Science, Analytics, and Executive leadership to ensure experiments are designed, executed, analyzed, and interpreted consistently across the organization.

Statistical Excellence: Own methodology across the company and introduce advanced techniques (CUPED, sequential testing, network effect measurement, marketplace methods, quasi-experimental designs, and incrementality measurement) to reduce decision latency.Product Partnership &

• Enablement: Act as a strategic advisor and coach to Data Analysts, Data Scientists, and PMs on hypothesis development, experiment design, and success metrics to raise overall experimentation maturity.Education: Build Wallapop's experimentation curriculum, deliver training programs for PMs, Designers, Engineers, and Analysts, and establish playbooks and office hours.Partner with Data Engineering and Analytics Engineering to improve infrastructure, evolve Amplitude Experiment data practices, and define quality standards for exposure logging.What We’re Looking For ðTechnical Expertise:8+ years of total experience in data science, product analytics, or causal inference, including at least 4 years deeply focused on experimentation (experimental design, statistical inference, A/B testing, and variance reduction).Tooling &

• Code: Strong SQL proficiency along with experience using Python or R.



Proven ability to partner directly with Product organizations and influence senior stakeholders using strong business judgment.What Would Be A Plus ðExperience in Amplitude Experience working in marketplaces, e-commerce, consumer internet, or two-sided platforms.We follow a hybrid model where flexibility rules. We commit to a minimum of 6 days per month in the office. Each team self-organizes to decide on cadence and in-person/remote rituals.We sponsor visa processes for international candidates when applicable and provide legal & admin support along the process combined with a competitive relocation package.Additionally to the opportunity to contribute to an agile product set up and work together towards achieving our meaningful mission, we offer the following ð­ Perks &

• Benefits:Generous individual learning budget of 2K per yearFree office meals, lunch selection from different providersGroup and individual English, Catalan &

• Spanish lessons as part of our working dayPrivate Health Insurance with AlanFlexible working hours + intensive FridaysFlexible remuneration to deduct from gross salary (kindergarten/food/transport check)Gym &

• Wellness plan, including physiotherapist in the officeGenerous referral Program &

• Charity DonationBonus for weddings & newbornsWallapop Renta (Tax income support)Monthly product advantages (Wallapop Club)Work anniversary Gifts and Birthday SurprisesContribution towards your WIFI in your monthly payrollOne-off payment based on compensation package to go towards setting up your home officeRelocation package (monetary support and legal advice) and visa sponsorship, if applicable26 holidays per yearTOP hardware of your choice (latest Apple or Windows)What does the hiring process for this position look like? ð Please, note that all interviews take place remotely over hangouts.Intro Call - run by talent acquisition, focus on providing more information about the role and the company as well as going over your experience, motivation, and expectations. Offer - should you be the right candidate, your offer will be discussed over a call with talent acquisition and will then be confirmed in writing.

📌 Staff Data Scientist, Experimentation (Cataluña)
🏢 Wallapop
📍 Cataluña