Engineer · Founder · Investor

Hey, I'm Borys.

I've always enjoyed building communities, from Linux and open source, through startup founders in Warsaw to angel investors and LPs in Central and Eastern Europe.

Borys Musielak
Currently

What I'm focused on now

Investing via SMOK Ventures

Actively deploying capital into pre-seed and seed stage startups in Central & Eastern Europe. Looking for deeply technical founders building in AI, DevTools, Gaming, and infrastructure.

Learn about SMOK

Connecting via SMOK Angels

Hosting dinners, founder retreats, and community events to connect founders and investors. I spend a significant chunk of my time just helping smart people meet other smart people.

Join as founder or angel

The Journey So Far

From writing early web scripts to building communities and backing founders. A non-linear path through the tech ecosystem.

2003

Got My First Job As Programmer

Stefan Batory took a chance on me and hired me as a junior programer. At eo I made very little money and very good friends for life.

Got My First Job As Programmer
2004

Graduated From PJATK

I wrote my first computer programs when I was 10, but college helped me understand how to design software and inspired to start a business at some point.

Graduated From PJATK
2005

Built The Largest Open Source Community in Poland

I built jakilinux.org, LinuxNews.pl and OSnews.pl, a group of online news and community services around GNU/Linux and open source. This is how I met top Polish hackers who later helped me build my startups, including my first co-founder Adam and my founding engineer Mariusz.

Built The Largest Open Source Community in Poland
2007

Moved To London

Relocated to London to check out investment banking. Turned out I hated it. Go figure.

Moved To London
2009

Filmaster Journey Begins

Founded Filmaster, a personalized movie recommendation engine. Learned the hard lessons of building a consumer product and raising capital.

Filmaster Journey Begins
2011

Reaktor Erupts In Warsaw

I co-founded Reaktor Warsaw, a coworking space that became the heart of the local startup scene. Started hosting Open Reaktor events to connect founders.

Reaktor Erupts In Warsaw
2014

Startup Poland Launched

Together with fellow startup founders launched Startup Poland foundation - the voice of Polish startups.

Startup Poland Launched
2015

Acquisition & San Francisco

Filmaster was acquired by Samba TV. Moved to San Francisco to join the leadership team, scaling the engineering organization globally.

Acquisition & San Francisco
2017

Kicked Off ReaktorX

Together with Diana we launched the first private acceleration program for first-time founders in the CEE region, out of Warsaw.

Kicked Off ReaktorX
2018

Growing Samba TV Europe

Moved back to Europe to establish and grow Samba TV's European engineering hub. Scaled the team from 0 to over 50 brilliant engineers.

Growing Samba TV Europe
2019

Invests in Dziki Warszawa

I fulfill my childhood dream and become a minority owner of Dziki Warszawa, a baskeball club that eventually got promoted to the major Polish basketball league and took part in multiple European cups.

Invests in Dziki Warszawa
2020

SMOK Ventures is Born

Transitioned from operator to investor. Co-founded SMOK Ventures, an early-stage venture capital fund backing exceptional CEE founders.

SMOK Ventures is Born
2023

Fund II Launched

Successfully raised a $25M fund II for SMOK Ventures, expanding from Poland to CEE & diaspora.

Fund II Launched
2025

Launched SMOK Angels

Got together 200+ active CEE entrepreneurs to build an unusual angel network - a pure community effort with no fees. Made 20 investments in year 1.

Launched SMOK Angels

Watch My Story

In an interview with Irina Obuchtarova from The Recursive I tell my story of how I transformed from an engineer to an entrepreneur and eventually a VC.

Let's connect

Building something interesting?

I'm always open to chatting with founders, engineers, and community builders. Whether you're raising your first round or just exploring ideas, say hi.