Borys Musielak
InvestorManaging Partner at SMOK Ventures
Warsaw, Poland
Writes $50K – $500K checks · typically $250K
Find your path to Borys
497 people in our graph share verified history with Borys — schools, employers, funds. One of them is your warm intro.
About
Borys Musielak is an engineer and entrepreneur with a product background. He previously founded the startup Filmaster, which was acquired by Samba TV in 2015, where he went on to build the company's European operations. He also co-founded Reaktor, a coworking space for startups, the ReaktorX acceleration program, and the Startup Poland think tank.
Contact· self-published, not guessed
Invests in
AI & Machine LearningDeveloper Tools
Experience
- SMOK VenturesFounding Partnercurrent2019 — presentWarsaw, Masovian District, Poland
- SMOK AngelsFoundercurrent2025 — presentWarsaw, Mazowieckie, Poland
- JuoInvestorcurrent2024 — presentWrocław, Dolnośląskie, Poland
- 57hoursInvestorcurrent2023 — present
- Shen AISeed Investorcurrent2021 — present
- AuthologicSeed Investorcurrent2021 — presentWarsaw, Mazowieckie, Poland
- inStreamlySeed Investorcurrent2020 — present
- ReaktorXLimited Partnercurrent2019 — presentSan Francisco Bay Area
- ReaktorXCo-Founder2016 — 2019San Francisco Bay Area
- Startup PolandCo-Founder, Board Membercurrent2014 — presentWarsaw, Mazowieckie, Poland
- Dziki WarszawaAngel Investorcurrent2020 — present
- Dziki WarszawaMember of The Supervisory Board2020 — 2024Warsaw, Mazowieckie, Poland
- Reaktor WarsawCo-Founder2011 — 2020Warsaw, Poland
- Samba TVDirector of Product Management2015 — 2019Warsaw, Masovian District, Poland
- FilmasterFounder & CEO2009 — 2015Warsaw, Poland
- OSmediaFounder2005 — 2012
- Deutsche BankConsultant2007 — 2010London, United Kingdom
- Rule Financial GroupConsultant2007 — 2010
- Barclays CapitalConsultant2009London, United Kingdom
- coconet GroupTechnical Project Leader2006 — 2007Warsaw, Masovian District, Poland
- empolis PolandSoftware Engineer2005 — 2006Warsaw, Masovian District, Poland
- eo NetworksSoftware Engineer2002 — 2004Warsaw, Mazowieckie, Poland
Skills & more
+12 more
Business StrategyConsultingBusiness NetworkingPublic SpeakingPersonalized RecommendationsLinuxPythonJavaJava Enterprise EditionXMLPostgreSQLTwitterFrom Borys's professional profile.
Deals · 2
SlickshiftLed round
via SMOK Ventures · filed Feb 2026
AlokaiLed round
via SMOK Ventures · filed Jan 2021
Attribution from SEC filings, press coverage, and firm rosters.
Other disclosed investments
Led
AuthologicinStreamlyMasthead DataPrimioSLS
Investor
AuthologicExit Plan GamesFamsFinmapGaminateGotivaHeroifyHipetsHyperscanInstreamlyJuoLETSDATAMOS HealthNibble GamesPrimioPrimio (formerly Darvin.dev)ProperGateProteine ResourcesQuantum FlytrapShen.AISmart HotelSmartHotelSunRoofVue Storefront
Sources: the firm's website · curated public sources.
Colleagues at SMOK Ventures
Network6
Investors connected to Borys in public investor directories — a warm-intro map.
Frequently asked questions
- Who is Borys Musielak?
- Borys Musielak is an engineer and entrepreneur with a product background. He previously founded the startup Filmaster, which was acquired by Samba TV in 2015, where he went on to build the company's European operations. He also co-founded Reaktor, a coworking space for startups, the ReaktorX acceleration program, and the Startup Poland think tank.
- Where does Borys Musielak work?
- Borys Musielak is Managing Partner at SMOK Ventures.
- What does Borys Musielak invest in?
- Borys Musielak invests in AI & Machine Learning, Developer Tools.
- What check size does Borys Musielak write?
- Borys Musielak typically writes checks of $50K – $500K.
- What companies has Borys Musielak invested in?
- Investments tracked here include Alokai, Authologic, inStreamly, Masthead Data, Primio, Slickshift, SLS, Alokai, Authologic, Exit Plan Games, Fams, Finmap, and 20 more.
- Where did Borys Musielak go to school?
- Borys Musielak studied at Polish-Japanese Academy of Information Technology (M.Sc., Computer Science - Software Engineering).
- Does Borys Musielak lead rounds?
- Yes — Borys Musielak has led 7 tracked investments.
Same school
Also attended Polish-Japanese Academy of Information Technology2
Shared employers
Also worked at 57hours1
Also worked at Samba TV9
+ 3 more
Also worked at Deutsche Bank981
+ 975 more
Also worked at Barclays Capital477
+ 471 more