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Clarity

Tomas Zezula

Prague

I help SaaS startups and product-led businesses build, fix, and scale their billing and subscription systems—especially with Stripe.

With 20+ years of engineering experience and a specialty in billing architecture, I guide teams through critical monetization milestones.

LinkedIn: https://www.linkedin.com/in/zezulatomas
Web: https://tomaszezula.com
Publications: https://medium.com/@TomasZezula

$1.67/min

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Electronic Payments Payment Gateways Billing Systems Billing

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Your First Billing System—Done Right

I work with SaaS founders who are launching (or fixing) their billing systems—often for the first time.

Whether you're validating your first pricing model or struggling with Stripe setup, I help you:
- Choose the right billing model for your product (subscriptions, usage-based, per-seat, etc.)
- Design a system that scales—from MVP to growth-stage
- Integrate with CRMs like HubSpot or Intercom to stay close to your customers
- Avoid common traps that create churn, support issues, or revenue leakage
- Turn billing into a strategic asset, not just backend plumbing

You don’t need a full-time engineer or a six-month roadmap—sometimes, you just need the right advice at the right time. Let’s simplify your path to getting paid.

Custom Billing & Subscription Systems

I specialize in building bespoke billing systems that go far beyond the basics. From custom checkouts to multi-tier pricing, I help SaaS and product-led companies design, implement, and optimize their monetization stack.

Typical projects include:
- Custom Stripe checkout flows tailored to your product
- Real-time monitoring of signups, upgrades, and churn
- Deep CRM integrations (e.g. HubSpot, Intercom)
- Automated invoicing and dunning logic
- Support for complex billing models (metered usage, per-seat pricing, etc.)
- Detailed financial reports and audit-ready activity logs

I help founders and technical teams avoid long-term debt by getting billing right from the start—both technically and strategically.

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Member since March 2025