Piotr Duszyński
Information Security Expert
Poland
Summary
🤩
Rockstar🎓
Top SchoolPiotr Duszyński is an information security expert with over 12 years of hands-on experience and a 15+-year background in offensive security, specialising in advanced penetration testing, secure architecture for cloud and mobile platforms, and DevSecOps automation. He has led security teams and programs across banking, payments, and enterprise clients—delivering PCI-compliant solutions, red team engagements, and low-level reverse engineering. Piotr contributes to notable open-source security tooling (improving regex engines and URL/domain handling in projects like Portspoof and Modlishka) which underscores his focus on practical exploitation and detection tooling. Comfortable at both code and advisory levels, he combines deep protocol and binary analysis experience with pragmatic security engineering for Azure/AWS and FaaS deployments. Based in Poland, he is known for turning complex compliance and threat models into automated, auditable workflows that scale across organisations.
12 years of coding experience
14 years of employment as a software developer
Master's degree Informatics - Networking Speciality, Master's degree Informatics - Networking Speciality at Lodz University of TechnologyBSc (Hons) Informatics, BSc (Hons) Informatics at Coventry University
English, Polish, Spanish
Github Skills (11)
regular-expression10
phishing10
c-language10
go10
reverse-proxy10
cprogramming-language10
network-security9
security8
security-scan8
security-txt8
openssl4
Programming languages (2)
Github contributions (5)
drk1wi/Modlishka
Dec 2018 - Feb 2022
Modlishka. Reverse Proxy.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 2 reviews, 95 commits in 3 years 2 months
Contributions summary:Piotr's contributions primarily involved core functionality within the reverse proxy, specifically focusing on URL and domain manipulation. They implemented and modified regular expressions for URL matching and translation between phishing and target domains. The user also addressed bugs related to plugin functionality and made adjustments to configuration and template files. These changes indicate a focus on improving the core logic and functionality of the reverse proxy, likely to improve security and usability.
security-toolsproxyreverse-proxyphishingmitm
drk1wi/portspoof
Sep 2013 - Jan 2022
Portspoof
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 54 commits, 12 PRs in 8 years 5 months
Contributions summary:Piotr primarily focused on improving the `Revregex` component, enhancing the regular expression processing capabilities within the `Portspoof` project. They improved the regex engine, refactoring bracket handling and adding new features for special characters. In addition to these improvements, the user addressed header inclusions and fixed minor issues within the `connection.cpp` file.
modbusport-scanningtcp
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