This person will define the companys 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 incrementally 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.

Build

Wallapops 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 Technical 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 Experience 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 Perks &

Benefits Generous individual learning budget of 2K per year Free office meals, lunch selection from different providers Group and individual English, Catalan & Spanish lessons as part of our working day Private Health Insurance with Alan Adaptable working hours + intensive Fridays Gym & Wellness plan, including physiotherapist in the office One-off payment based on compensation package to go towards setting up your home office Relocation package (monetary support and legal advice) and visa sponsorship, if applicable 26 holidays per year TOP hardware of your choice (latest Apple or Windows) 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 then be confirmed in writing. #

📌 Staff Data Scientist - Experimentation (Barcelona)
🏢 Wallapop
📍 Barcelona