Marek Kowalski
CTO & Co-Founder at Rumble Fish Software Development
Cracow Metropolitan Area Poland
Summary
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Rockstar🎓
Top SchoolMarek Kowalski is a seasoned CTO and co-founder with over 15 years in software engineering and leadership, currently scaling Rumble Fish into a fast-growing consultancy and product studio with nearly 300% growth in two years. He combines hands-on full-stack experience—including cloud-native AWS solutions, DeFi and fintech systems—and strategic oversight, guiding international expansion and technical hiring. Marek additionally serves as Chief Architect at Acquire, where he focuses on Postgres, Nest.js integration and Amazon DevOps for a mobile-first investment platform. An early developer in decentralized tooling, he contributed to a private p2p chat project built on Tor and IPFS, showing an interest in privacy-preserving architectures beyond typical enterprise stacks. Trained as a theoretical physicist, he blends analytical rigor with entrepreneurial drive and mentors engineers while staying immersed in cutting-edge tech trends.
13 years of coding experience
13 years of employment as a software developer
master theoretical Physics, master theoretical Physics at Jagiellonian University
English, Spanish, Polish
Github Skills (16)
decentralization10
typescript10
javascript10
typescripts10
front-end-development10
typescript-types10
p2p10
react9
app-architecture9
architecture9
electron9
debug9
debugging9
ipfs8
back-end-development8
Programming languages (12)
Github contributions (5)
TryQuiet/quiet
Jan 2020 - Jan 2023
A private, p2p alternative to Slack and Discord built on Tor & IPFS
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:5 releases, 101 reviews, 47 commits in 3 years 1 month
Contributions summary:Marek primarily contributed to the ZbayLite application, a decentralized chat alternative, addressing various issues and implementing improvements across both the frontend and backend. They fixed linting issues and addressed problems with application closing, indicating debugging and maintenance efforts. The user also adapted the codebase to changes in the underlying infrastructure and corrected type mismatches, showing an understanding of the project's architecture and dependencies. Furthermore, they resolved TypeScript errors and improved the initialization sequence for the application.
local-firstipfsprivacydiscordp2p
pragmaticcoders/featmongo
Sep 2014 - May 2016
Contributions:20 commits, 4 PRs, 17 pushes in 1 year 8 months
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