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# Conversion Rate Optimisation (CRO) Specialist

- **Company:** Número De
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Software as a Service, Multivariate Testing, Data Analytics, Marketplace
- **Published:** October 6, 2026
- **Apply:** https://www.adzuna.es/details/5912822236

## About the Role

* Tech experience: 3+ years of hands-on Conversion Rate Optimisation experience in the Tech sector, ideally within a multi-market, multi-language, multi-product business (mandatory). Marketplace or SaaS background is a strong plus.
 * Agile & Data-Driven: Highly analytical, with a proven track record of using data and experimentation to challenge assumptions and drive measurable commercial outcomes.
 * Execution & Delivery Mindset: A true "doer" who combines the strategic thinking to prioritise the right tests with the hands-on drive to run them end-to-end.
 * Structured yet Scrappy: Highly structured in managing a testing roadmap across complexity and scale, yet scrappy and agile in getting experiments live quickly.
 * Languages: English fluency is mandatory. Any other European language is a plus.

## Description

We are seeking a data-driven Conversion Rate Optimisation Specialist to own and accelerate on-site and in-app conversion performance across our dual sided marketplace (booking for marketplace, lead generation for SaaS). Reporting to the Head of Growth Marketing, you will design, run, and scale a structured experimentation programme across 14 markets, multiple languages, and multiple products, turning customer behaviour insights into measurable revenue impact.

This role carries a dual objective:

 * Conversion growth: Build and execute a continuous A/B and multivariate testing roadmap to improve conversion across the full B2C customer journey, from acquisition to booking.
 * Experimentation culture: Embed a rigorous test-and-learn discipline across Product, UX, and Marketing, ensuring every major journey change is validated with data before it scales.

You will be responsible for:

 * CRO Roadmap & Testing: Own the end-to-end CRO testing roadmap, from hypothesis generation and prioritisation through to test design, execution, and analysis across web and app.
 * Multi-Market, Multi-Language Experimentation: Run and localise experiments consistently across 14 countries and languages, accounting for market-specific behaviour while protecting statistical rigor.
 * Multi-Product Funnel Optimisation: Identify and resolve conversion friction across the marketplace's B2C funnels, partnering with Product and Data teams to prioritise the highest-impact opportunities.
 * Insights & Reporting: Translate test results into clear, actionable insights and recommendations for senior stakeholders, building a shared knowledge base of what drives conversion.
 * Cross-Functional Collaboration: Partner closely with Product, UX/Design, Data, and Performance Marketing to align experimentation priorities with broader growth and commercial goals.