Maciej Witowski
Krakow, Lesser Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolMaciej Witowski is a seasoned engineering leader with 12 years of experience building products at the intersection of AI, data, and blockchain, now advising and investing while serving on boards. He’s led teams from enterprise mobile at Zendesk to launching the Filecoin Virtual Machine at Protocol Labs, scaling the platform to hundreds of thousands of users and millions in value locked. Hands-on by temperament, he designs core architectures, ships full-stack systems, and contributes to open-source—having fixed protocol-level bugs and improved UX in the flagship Filecoin lotus repo. Comfortable across distributed systems, cryptography, and product, he’s repeatedly built small, high-ownership teams that turn hard R&D into commercial offerings. Based in Krakow, he blends deep technical craft with operator instincts and the uncommon experience of both early-stage startup execution and platform-scale launches.
11 years of coding experience
13 years of employment as a software developer
Cisco Certified Network Associate, Cisco Certified Network Associate at Proidea KrakówMaster of Science (MSc), Telecommunications, Master of Science (MSc), Telecommunications at AGH University of Krakow
Polish, English
Stackoverflow
92reputation
3kreached
6answers
2questions
Github Skills (15)
filecoin10
go10
blockchain10
ui-design8
css7
html7
browser6
javascript6
ipfs6
android6
filepicker6
amazon-s36
coffeescript6
ruby-on-rails6
java6
Programming languages (12)
Github contributions (5)
filecoin-project/lotus
Nov 2022 - Nov 2023
Reference implementation of the Filecoin protocol, written in Go
Role in this project:
Back-end Developer & UI Designer
Back-end Developer & UI DesignerContributions:20 reviews, 11 PRs, 19 pushes in 1 year
Contributions summary:Maciej contributed to the Filecoin project by working on both back-end and front-end aspects. They fixed bugs in the Eth JSON-RPC functionality, specifically addressing issues with transaction data. They also implemented improvements to the `lotus-fountain` UI, modifying the CSS and HTML for a better user experience, including changes to button appearance and input field design.
golangipfsfilecoinblockchainfilecoin-protocol
galadriel-ai/galadriel
Feb 2025 - Mar 2025
Framework for building autonomous, economically useful AI Agents.
Contributions:47 reviews, 25 PRs, 50 pushes in 27 days
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