Zbigniew aka Zeebee Siwiec

The Origin

I learned engineering before I knew the word. My father, a hands-on electronics engineer from the era of first tape computers, turned our home into a workshop. I wasn't the one fixing things. I was watching, handing him tools, soaking up how he approached problems he didn't fully understand yet.

What transferred wasn't skill. It was disposition: optimism for complexity, patience when things don't work, and his relentless principle: use the right tool for the job, learn new things, never cut corners. Those are still the muscles I use every day.

Father Now

Today I'm raising four kids near the mountains of Southwest Poland. Our home is still a workshop: woodworking, 3D printing, ski gear repairs. The same principle applies: understand how things work, take care of them properly, fix what's broken.

This shapes how I work with teams. Engineering and business often treat each other as opposing forces to manage. I work to dissolve that boundary, creating flow where product decisions are informed by technical reality, and engineers understand the business context of their work. Not shielding. Integrating.

The Arc

15+ years building digital products:

• Started in interactive media (Flash, iOS) at agencies serving Channel 4, UK Rail, and transport systems across Europe. Across dozens of clients and fast cycles, I learned to context-switch and read what clients actually need
• Co-built and ran a software house for over a decade, partnering with a UK agency across dozens of long-term engagements. Learned operational discipline when you own delivery, not just design
• 3 years as CTO of a venture-backed startup: AI-powered social platform, web3, distributed team across 5 countries. Learned what happens when you own outcomes over years, not weeks

Agency taught range. Software house taught rigor. Product taught patience. Consulting lets me deploy all three.

What I Do Now

I work with businesses and startups to rethink how they serve their customers through domain-specific agents. We start with what people need to get done, then work out what the agent needs to know and do to help.

I build agentic systems alongside teams, combining technical design, architecture, and implementation with consulting, teaching, and mentoring. We work through what to delegate, how to judge the results, and how agents fit into the business. The aim is to leave the team able to carry the work forward.

Building in Public

I don't just advise. I ship. Most days you'll find me deep in a codebase, wiring up a prototype, or wrestling a deploy into shape. Craft is a practice, not a pitch deck.