Increase Revenue with A/B Testing & CRO
20+ years running thousands of split tests for startups to $5B companies. Data & AI-driven optimization that delivers measurable results.
Results That Speak
Career Highlights
Ciao → Microsoft Acquisition
Co-founded Ciao, scaled to 120 employees, acquired by Microsoft
Trivago Growth
2nd product designer, helped scale to $5B market cap & 1,500+ employees
Top 10 App Launch
Led Trivago mobile app concept — #10 in Germany upon launch
$25M+ Funding Raised
Across multiple successful ventures including Grid ($5M) and Ciao
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How I Can Help
Three ways to work together, depending on your needs and resources
Done-For-You CRO
From strategy to execution
I handle everything: audit, test planning, design, and implementation. Run 5-45 tests per month depending on your traffic.
- ✓ Full A/B testing program management
- ✓ Copy, layout, CTA, and UX optimization
- ✓ Weekly reporting and insights
CRO Audit
Pinpoint revenue leaks
Get a prioritized action plan with visual mockups showing exactly what to fix. Includes 1-hour implementation call.
- ✓ Deep-dive conversion analysis
- ✓ Prioritized recommendations
- ✓ Visual examples & mockups
- ✓ 1-hour consultation call
- ✓ Guarantee: Find $10K+ revenue leaks or refund
Hourly Consulting
Expert guidance on demand
Dive into your analytics, heatmaps, and user behavior data to map out high-level testing strategies.
- ✓ Analytics & heatmap review
- ✓ Test strategy recommendations
- ✓ Q&A on your CRO challenges
What to Expect
A simple 3-step process to transform your conversion rate
Free Discovery Call
30 minutes to discuss your CRO challenges and goals. No sales pressure, just honest advice.
Custom Strategy
I'll analyze your site and create a tailored testing roadmap designed for your specific business.
Results & Growth
Watch your conversion rate climb as we implement data-driven optimizations week by week.
5 A/B Testing Challenges I Solve
Common obstacles that prevent companies from getting results with A/B testing — and how I help overcome them.
"We're only running one test at a time."
Solution: Run multiple A/B tests simultaneously without compromising results.
- Increase testing speed by 10x
- Reach higher conversions faster
- Implement proper test segmentation
"We don't know what to test next."
Solution: Build a structured test ideation process that works.
- Generate high-impact ideas from user research
- Prioritize changes with highest potential ROI
- Eliminate guesswork from your testing program
"Our messaging doesn't resonate with our audience."
Solution: Find what connects with users through systematic testing.
- Accelerate your path to product-market fit
- Identify language patterns that drive conversions
- Optimize feature presentation and pricing
"We struggle to build a data-driven culture."
Solution: Create processes that make data-driven decisions stick.
- Implement structured documentation systems
- Establish knowledge sharing practices
- Create test review rituals that value learning
"We have ideas but struggle with implementation."
Solution: Get hands-on support from design to technical execution.
- Ensure tests launch correctly and collect reliable data
- Handle technical details for you
- Free your team to focus on strategy and growth
My Method
Accelerating conversion optimization through strategic experimentation
Traditional Approach
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1. Sequential Testing Run one test, wait for results, then start next test
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2. Low Velocity Only a few tests per month/quarter
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3. "Ship and See" Mentality Push changes live without proper validation
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4. Isolated Efforts Testing disconnected from product strategy
My Method
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1. Overlapping Test Strategy Multiple tests running simultaneously in isolation
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2. Accelerated Test Velocity 10x more tests in the same timeframe
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3. Optimized Testing Workflow From ideation to implementation and analysis
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4. Team Integration Collaborative approach with product teams
What 50+ Clients Say
"Valentin played a key role in driving a major uplift in our conversion performance. He increased A/B test velocity by over 30%, directly contributing to a 48% month-over-month increase in conversions. His expertise in CRO is exceptional."
"Valentin transformed our experimentation program at inne. He built a true testing culture from scratch, enabling our team to run their own tests. His structured approach sped up our testing and boosted our conversion rates. Within one week we had multiple tests running, and purchase revenue increased by 14.6%. Valentin combines deep technical knowledge with practical know-how, making him invaluable for any company wanting to improve conversions."
"Valentin transformed the A/B testing approach across both our companies - Truely and International Drivers Association. Before his help, we relied on developer-implemented tests which severely limited our testing velocity. Valentin showed our teams how to effectively use the Convert.com editor and implemented a streamlined ideation process. We're now moving towards doubling conversions. His hands-on training meant everyone could create and implement tests independently."
"Valentin kick started our A/B testing and helped us set up impactful tests and increase revenue significantly. His structured approach and deep CRO expertise made an immediate impact."
"I had the pleasure of working with Valentin Yeo as a freelance UX consultant at trivago. Valentin's keen insights and user-centered approach were pivotal in enhancing our product's user experience. His ability to bridge the gap between design and functionality is truly commendable. Valentin's professionalism, innovation, and collaborative nature make him an asset to any team. Highly recommended."
"Working with Valentin has been an absolute game-changer. His massive experience in CRO shines through in every step of the process. Communication with him is always swift, professional, and to the point. Valentin's ability to work independently and proactively is outstanding—he quickly identified the key KPIs we needed to focus on and provided invaluable support in optimizing them. The results speak for themselves: an above-average success rate in split tests and tangible improvements across the board. If you're looking for a CRO expert who delivers results with professionalism and expertise, Valentin is the one. Absolute recommendation—go for it!"
Tools I Use
A/B Testing Platforms
VWO (Visual Website Optimizer)
Convert.com
Optimizely.com
PostHog
Analytics & Research
Google Analytics
Hotjar
UserTesting.com
Custom analytics dashboards (Looker)
Process Management
AI supported Kanban system for test management (Hypertasks)
Kanban/PM tools (Linear, Jira, Notion, etc.)
Test prioritization framework (ICE)
AI-driven processes for test velocity (ideation, ticket creation, mockups)
VWO Copilot for ideation
Implementation
Cline.ai for early mockups
Figma
Visual editors (VWO, Convert.com) with AI support
When You'll See Results
Case Studies
inne (Femtech)
Built testing culture from scratch. Within 1 week: multiple tests running. Result: 14.6% purchase revenue increase through strategic A/B testing and mobile optimization.
Trivago
Joined as 2nd product designer. Helped scale from startup to $5B market cap with 1,500+ employees. Ran hundreds of A/B tests and led the mobile app concept that became Top 10 in Germany.
Truely (SaaS)
Increased A/B test velocity by 30%+, directly contributing to a 48% month-over-month increase in conversions. Trained team to run tests independently.
Eduki
Transformed from 5 tests/quarter to 120+ tests/quarter. Built data-driven culture from scratch through systematic A/B testing implementation.
Hairskin (DTC)
Drastically increased testing velocity resulting in 3x daily orders. Strategic Shopify CRO with focus on checkout optimization.
Ciao
Co-founded consumer platform, raised $25M funding, scaled to 120 employees. Successfully acquired by Microsoft.
Ready to Transform Your Conversion Rate?
Book a free 30-minute strategy call to discuss your CRO challenges and get a customized action plan.