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References: who I’ve worked with
Over the years, I’ve worked with fast-growing startups and established companies across the Czech Republic, Europe, and the United States. Through penetration testing, audits, and bug bounty, I’ve identified thousands of security issues and helped protect systems used by millions of people worldwide.
Beyond client work, I actively contribute to the security community through open-source tooling, public talks, and knowledge sharing. As the OWASP Czech Chapter leader, I focus on improving application security awareness and raising the overall security maturity of teams and organizations.
Some of the companies I’ve helped include:
Testimonials
Kamil and I worked in the same corporate Security department. Despite working on different projects, Kamil shared his expertise with me, and I learned a lot from him. Thanks to his presentations at Impact Hub Brno, I became acquainted with the bug bounty program, which motivated me to look into the career options in the Information Security field and to enroll in a cyber security MSc program. He provided a referral to me when I was seeking employment at two different companies, one of which became my current employer, which I was truly happy about. Thanks, Kamil, for mentoring me, and keep rocking!
HackerOne
Great proof of concept
This researcher provided good proof of concept that made remediation with the developer easier on our part
Detailed and accurate report
Concise report
Provided a lot of information and an important vulnerability, with good examples and a nice communication
Public Talks
| Date | Description | Conference |
|---|---|---|
| 2025-09-30 | Hacking a Pharmacy for Fun and Drugs | OWASP Meeting |
| 2024-11-14 | SSRF Adventures: Chaining Your Way Through the Network | OWASP Meeting |
| 2023-11-08 | Hacking a Cruise Ship | OWASP Meeting |
| 2023-10-06 | Hacking a Cruise Ship | PraSec.cz |
| 2022-04-27 | Compromised Keys | Security Meetup |
| 2022-04-05 | Compromised Keys | OWASP Meeting |
| 2021-11-25 | WordPress Supply Chain Attack | OWASP Meeting |
| 2021-08-05 | I know where you live | OWASP Meeting |
| 2020-11-09 | Ethical hacking - web security | Private event |
| 2020-08-24 | Ethical hacking - web security | Private event |
| 2020-08-03 | Ethical hacking - web security | Private event |
| 2020-06-24 | Ethical hacking - web security | Private event |
| 2019-12-11 | An introduction to the router exploit kits | OWASP Meeting |
| 2019-11-20 | Burp Suite & OWASP Top 10 | UTB.cz |
| 2019-10-31 | OWASP Top 10 workshop | OWASP Meeting |
| 2019-07-31 | Ethical hacking - web security | SABO Bootcamp |
| 2019-05-01 | Bug Bounty ~ Work Smarter, Not Harder | CTJB.net |
| 2016-06-01 | Ethical Hacking | CEVRO.cz |
| 2015-04-01 | Infecting Google Chrome from PowerShell | CTJB.net |
| 2014-10-01 | Kali Pwn Pad - armed with a tablet is a danger to society | HackerFest.cz |
| More details at vavkamil.cz/talks |