Hubert Ritzdorf
Blockchain Security Engineer at ChainSecurity
Zurich, Zurich, Switzerland
Summary
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SeniorHubert Ritzdorf is a blockchain security engineer and researcher with a PhD from ETH Zurich and 11 years of experience in cloud and blockchain security. He served as CTO of ChainSecurity and later as Technical Lead for PwC Switzerland’s Smart Contract Assurance practice, leading audits and designing analysis tools that sped up and improved code reviews. Hubert has audited smart contracts for over 50 clients, uncovering numerous critical vulnerabilities in projects that raised several hundred million dollars, and helped surface issues ahead of Ethereum hard forks. As an Innosuisse Special Coach for Blockchain he advised Swiss startups on secure protocol and system design, blending hands-on auditing with high-level architectural guidance. His work spans execution engines, automated analysis tooling, and developer education, reflecting a rare mix of deep research, practical offensive security experience, and product-focused engineering. Based in Zurich, he focuses on making smart contracts reliably secure by attacking problems from multiple technical and organizational angles.
11 years of coding experience
9 years of employment as a software developer
German, English
Github Skills (110)
programming-language10
contract10
eip10
smart-contracts10
cpp10
scanner10
solidity10
modular10
reserve10
pythonic10
vyper10
dapps-development10
erc2010
ethereum-dapp10
ethereum10
Programming languages (11)
Github contributions (5)
ChainSecurity/deployment_validation
Jul 2023 - Mar 2025
Deployment Validation Files aim to simplify Deployment Validation of Smart Contracts
Contributions:21 PRs, 36 pushes, 16 branches in 1 year 8 months
ethereumsmart-contracts
eth-sri/securify
Oct 2018 - Sep 2019
Security Scanner for Ethereum Smart Contracts
Contributions:64 commits, 12 PRs, 48 pushes in 11 months
scannerethereumsecuritysoliditysmart-contracts
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