I find your future clients through outbound, combining data, AI, and human insight.

I’m Mateusz Sekta, Founder of Vanderbuild, a GTM engineering agency. I help B2B companies build outbound systems and orchestrate their CRM data, so qualified leads land in your pipeline and stay clean, segmented, and ready to close.

With my team, I build systems across the full customer journey, from first touch to expansion.

What I do:

Outbound
Volume campaigns, micro campaigns, and signal based campaigns. From market and data analysis to reaching decision makers, validating sales hypotheses, and booking meetings.

CRM data automation
We clean, update, and enrich your CRM, implement data orchestrators, score and segment leads, and connect inbound data with automated outbound.

Tools implementation
Woodpecker for sending and deliverability, Clay and Claude for data orchestration. Set up inside your stack and run by your team, not ours.

Why teams work with me:

– Clay Cup Vice Champions. My team ranked #2 globally and #1 in Europe in GTM engineering.

– 250+ outbound campaigns launched in 2025.

– 50+ revenue engines built across DACH, CEE, UK, and US markets.

– Every system runs inside your accounts. When the engagement ends, the work stays with you.