Conversion Rate Optimisation (CRO) Specialist

We are seeking a data-driven Conversion Rate Optimisation (CRO) 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.

• Hybrid
• Full time
• Amsterdam, North Holland, Netherlands
• London, England, United Kingdom
• Madrid, Community of Madrid, Spain

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.

💡 About Treatwell

Hi, we’re Treatwell. Nice to meet you.

We’re a team of 700 passionate and brilliantly talented people across Europe. We’re the industry’s smartest salon management software, all connected to Europe’s leading bookings platform, working with over 95,000 salon partners across 14 countries, processing over 8 million bookings every month. And….breathe.

But we’re not done yet. We’re on an exciting journey to digitally revolutionise the hair and beauty community.

If this excites you, we might just have the role for you.

Requirements

🔝 About you:

• 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.

Benefits

💼 We’ll treat you with:

• 28-days holiday, plus bank holidays 🏖️
• Monthly 40 EUR/GBP Treatwell vouchers so you can treat yourself too 💅🏻
• Mental health support through our partnership with Open-Up 🧘🏻
• Market-specific benefits 🤓