Predictable growth. Lower CAC. Higher LTV.
I fix the funnel leaks that waste your budget - and get them working in under 90 days.
Growth & Conversion Specialist | Amsterdam, NL
15+ years in SaaS, fintech, and ecommerce. I find where your funnel leaks money and fix it. Then I make sure your marketing spend actually pays off over time.
Currently taking on only 1 new client in Q1 2026.
Your growth engine isn't broken - it's under-optimized
Here's what you need to know: Most growth problems aren't about traffic volume - they're about value leakage at critical funnel stages. I help you identify where users drop off, why they churn, and which channels waste budget. Then we fix those specific points with measurable experiments that improve CAC, LTV, and payback period within 90 days.
Most founders think they need more traffic, bigger budgets, or new channels. But the truth is: most growth engines leak value. Funnels fail quietly in onboarding. Paid campaigns scale in one market but lose efficiency abroad. CRM flows run, but retention metrics don't move.
These leaks aren't obvious without structured data and a proven playbook. That's where I step in. I don't just patch one channel - I re-align acquisition, activation, and retention so they compound. The process: diagnose leaks -> run measurable experiments -> scale only what works.
My approach ensures that every euro invested returns measurable value. Instead of chasing vanity metrics, I help you achieve outcomes that matter: lower CAC, higher LTV, faster payback. It's about turning growth from guesswork into a predictable system.
Why Work With Me
In short: I combine 15+ years of hands-on growth experience with senior strategic thinking. Unlike pure strategists, I execute campaigns directly in your tools. Unlike pure tacticians, I align every test with board-level metrics like CAC payback and LTV. You get both the strategy and the implementation, without needing to hire a full team.
Many consultants either stay tactical (run ads) or stay strategic (advise only). I do both. I work inside your accounts, but I also bring the senior experience to align growth with investor expectations and board-level metrics.
- 15+ years in SaaS, fintech, ecommerce.
- Ex-bunq, Bitvavo, Dyme - scaled growth to millions of users.
- Proven lifts: +20-30% conversion, shorter CAC payback, higher retention.
- Advanced stack: SQL, GA4, predictive analytics, attribution models.
- Hands-on partner: no vanity decks, just execution + measurable results.
With me, you don't get more tasks - you get a growth system that compounds.
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What I Deliver
The deliverables: You receive a complete growth system - not just advice. This includes funnel diagnostics, user research insights, conversion optimization fixes, smarter acquisition channels, AI-powered campaign optimization, and hands-on execution support. Everything is measured against revenue metrics and designed to compound over time.
- 📊 Funnel Simplification (That Is Data-Driven!)
No fluff. Just clear, structured conversion wins across your entire growth engine. - 🔎 User Research + Behavioral Insights
Get visibility into who's dropping and why - and how to convert more of them. - 🚫 Remove Conversion Killers
I unblock the UX snags, the messaging mismatches, the data gaps that stop users from buying. - 📊 More Intelligent Acquisition Channels
Cut waste. Improve ROAS. Create repeatable growth processes. - 🤖 AI-Powered Marketing: Generative AI & Smart Bidding
Leverage generative AI for ad creative testing, predictive analytics, and smart bidding optimization. - ⚙️ AI-Based Execution Support
You receive insights and hands-on fixes - underpinned by automation and over 15 years of growth experience. - 🔄 CRM & Retention Systems
Implement lifecycle marketing with Customer.io, Braze, or Klaviyo to reduce churn and increase customer lifetime value.
Work With Me
Three ways to start: Choose the engagement that fits your current needs and budget. Start with a rapid audit to identify opportunities, commit to a 3-month sprint to fix critical funnel leaks, or partner ongoing for continuous growth optimization. Each option includes hands-on execution and clear success metrics.
🔍 Audit & Strategy Sprint - €1,490
- 10-day rapid audit, prioritized roadmap, 90-day experiment plan
- Deliverables: findings PDF, opportunity scorecard, backlog of 6-10 tests
- Perfect for: understanding your funnel's biggest opportunities
- Includes: 1-hour strategy call and detailed recommendations
✅ Conversion Funnel Fix - €4,999 (3 Months)
- High-impact 3-month sprint to unlock stalled revenue.
- Full-funnel strategy aligned with long-term LTV goals.
- Predictive models and channel frameworks that scale.
- Data-informed hypotheses & A/B testing plans
- Weekly check ins & full implementation support
- Low fluff, revenue and results focused
💼 Ongoing Growth Partnership - EUR 1,999 / month
- For scale-ups and ecommerce brands looking for ongoing growth assistance.
- Monthly growth plan & its execution
- Cross-team support (acquistions, retained, cro, crm)
- Slack + async support
- Quarterly mini-reviews and re-prioritization of goals
Common Questions About Working Together
What is a Strategy Call?
A strategy session reviewing your funnel, retention, and acquisition, with clear next steps. It's a 60-minute deep dive where I map your current bottlenecks and create a prioritized action plan.
How fast can I see results?
Most clients see lifts in 60-90 days, depending on funnel complexity and test velocity. Quick wins often appear within 2-3 weeks for simple optimization changes.
Do you also implement campaigns?
Yes, I work hands-on in ad accounts, CRM tools, and data stacks. I don't just advise - I execute the strategies I recommend to ensure they work.
Can you help in multiple countries?
Yes, I've scaled campaigns in 40+ markets, handling localization, attribution, and ad ops. I specialize in wave-based rollouts that minimize risk while maximizing scale.
What industries do you specialize in?
SaaS, fintech, ecommerce - subscription models and multi-market growth. My experience spans from early-stage startups to €100M+ revenue companies.
What's your typical engagement model?
I offer both project-based work (audits, implementations) and ongoing partnerships. Most clients start with a Strategy Call to identify priorities, then choose the engagement that fits their needs and budget.
Do you work with companies outside Europe?
Absolutely. While I'm based in Europe, I work with companies globally. My experience spans North America, Asia-Pacific, and Latin America, with deep understanding of local market dynamics.
What's the minimum budget for paid media management?
I typically work with companies spending €10K+ monthly on paid media. For smaller budgets, I recommend starting with an audit to identify the highest-impact optimizations first.
How do you measure success?
Success is measured by sustainable growth metrics: improved CAC/LTV ratios, increased conversion rates, better retention, and ultimately, profitable revenue growth. I provide detailed reporting and regular check-ins to track progress.
Do you work with in-house teams or agencies?
Both. I can complement your existing team by providing strategic direction and hands-on execution, or work alongside agencies to ensure alignment and avoid conflicts. I'm flexible about integration approaches.
What tools and platforms do you use?
I work with all major platforms: Google Ads, Meta, TikTok, LinkedIn, Customer.io, Braze, Klaviyo, and various analytics tools. I'm platform-agnostic and choose the best tools for your specific needs and budget.
How do you handle data privacy and compliance?
I'm fully GDPR compliant and work within your existing privacy frameworks. All data handling follows strict security protocols, and I can sign NDAs and data processing agreements as needed.
What do you actually fix in a funnel?
I identify and fix specific conversion blockers: unclear value propositions, friction in signup flows, poor onboarding sequences, leaky checkout processes, weak retention triggers, and misaligned acquisition channels. Each fix is tested and measured against clear revenue metrics like CAC payback and LTV improvement.
When does it make sense to hire a growth consultant?
Hire a growth consultant when you have product-market fit but growth has plateaued, when CAC is rising faster than LTV, when you're scaling to new markets and need structured playbooks, or when your team lacks senior growth expertise. Ideal timing is when you have budget to test but need strategic direction.
How fast can I see results?
Most clients see lifts in 60-90 days, depending on funnel complexity and test velocity. Quick wins often appear within 2-3 weeks for simple optimization changes. Sustainable growth improvements typically compound over 3-6 months as we optimize multiple funnel stages and build repeatable processes.
Do you also implement campaigns hands-on?
Yes, I work hands-on in ad accounts, CRM tools, and data stacks. I don't just advise - I execute the strategies I recommend to ensure they work. This includes campaign setup, A/B test implementation, tracking configuration, and ongoing optimization based on performance data.
How do I know if my site is optimized for AI search?
Use my free AEO Score Tool to check how well your content performs in AI-powered search engines like ChatGPT and Google AI Overviews. The tool analyzes entity recognition, evidence quality, and experience signals, then provides a tailored fix plan to improve your visibility in answer engines.
Latest Resources
CRM Implementation Checklist 2026
Practical checklist for data, events, integrations and lifecycle flows so your CRM implementation does not turn into technical debt.
Open checklistClient Feedback
"Since I started working with Maciej, our business has undergone a significant transformation. He introduced me to the essential principles of growth processes and offered hands-on support with specific projects and ideas that helped us regain momentum. He has the ability to consider all aspects, from team dynamics and company culture to processes, platforms, and technology. I highly recommend him."
Let's fix your funnel – your way
Book a quick intro call or send me a short brief. I'll review your funnel and reply with next steps – no fluff, no hard sell.
Book a 30-minute Free Strategy Call
Use this short call to pressure-test your current funnel, ask questions, and see if it makes sense to work together.
Prefer email? Send a short brief.
Share a few details about your product, traffic, and where you think the funnel is leaking. I'll reply personally.