Roman Mazur
Founder & CEO at Walnut
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolRoman Mazur is a founder and CEO with 11 years of experience turning product ideas into shipped products, currently leading Walnut from London. He blends product leadership and hands-on engineering—earlier roles include Senior Product Manager at Argent, Head of Engineering at Appear Here, and product work at Microsoft where he launched Skype Professional Accounts in the US. He introduced React and a front-end SDK at Kentico, boosting usability scores through cross-functional guilds and workshops, and has taught agile web development at university level. Roman sits at the intersection of product strategy and execution, comfortable coordinating engineering, design, legal and marketing to deliver alpha-to-market launches. His GitHub note "STARK-pilled" hints at active interest in crypto/zk ecosystems, which likely informs Walnut’s technical direction. Pragmatic, UX-minded and startup-savvy, he focuses on making complex ideas happen with measurable user impact.
11 years of coding experience
8 years of employment as a software developer
Bachelor's degree, Information Technology, Bachelor's degree, Information Technology at Brno University of Technology
English, Czech, polština
Github Skills (46)
cairo10
debugging9
starknet9
react8
blockchain8
ethereum8
finance8
solidity8
taxonomy7
testing7
tooling7
evm7
smart-contracts7
rust7
cryptocurrency6
Programming languages (12)
Github contributions (5)
walnuthq/cairovm.codes
Jan 2024 - May 2025
Web app for experimenting with Cairo, Sierra and CASM, with step-by-step debugging.
Contributions:62 reviews, 73 PRs, 81 pushes in 1 year 3 months
debuggingstarknet
walnuthq/walnut-landingpage
Nov 2023 - Mar 2026
Contributions:40 reviews, 116 PRs, 175 pushes in 2 years 4 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.