Why Trust 0xSimao?
Focused on Your Security. Every Protocol. Every Time.
22 Top-3 finishes in public audit competitions
Proven tracked record in public audit competitions — timeboxed security reviews where competitors race to identify as many vulnerabilities as possible.
My handle is 0x73696d616f, which is the hexadecimal form of "Simao".
Led over 30 private audits
I have conducted private security reviews across various blockchain domains, identifying critical issues in over 90% of audits.
2nd Place on the Sherlock Leaderboard
Sherlock has an Elo rating system for security researchers, with 730+ officially registered accounts, placing me in the top 0.2%.
Founding Member of Blackthorn
I am one of the 11 founding members of Blackthorn, a top-tier auditing firm composed of renowned professionals in the Web3 security space.
Former Head of Security at Three Sigma
I was responsible for the security department, having led 30+ audits.
Top-Ranked on Code4rena
Code4rena is an audit contest platform, and I have ranked in the Top 3 over the past 90 days.
Top-Ranked on Cantina
Cantina is an audit contest platform where I have achieved Top-3 in 3 competitions.
6 consecutive 1st places on Sherlock
In competitions with hundreds of participants, achieving 6 consecutive 1st places is a statistical rare accomplishment.
Exceptional Coverage
I consistently identify the highest number of issues in audit competitions, including uncovering all vulnerabilities on multiple occasions.
Solo Findings
In most public audits, I consistently discover unique vulnerabilities that go unnoticed by others, even in competitions with 400+ participants.
Consistent Exceptional Performances
During the Autonomint competition on Sherlock, I identified 38 High/Medium issues in just 26 days.
Master's in Aerospace Engineering
Leveraging advanced skills crucial for complex Web3 security audits.
Client Testimonials
Hear from protocols who’ve secured their code with my help
“0xSimao was our Lead Senior Watson for Superfluid Locker System audit competition. He quickly demonstrated a total understanding of the protocol, its goal and mechanics.
Regarding performance, we were glad to have him contribute to our audit. All of the final 3 High and 3 Medium severity issues raised during the audit were discovered by 0xSimao.
Communication was crystal clear, questions were pertinent. It was a really pleasant experience to collaborate with him during the Sherlock contest.
Finally, 0xSimao’s reactivity and advice were very appreciated during the fix review process. He allowed us to successfully strengthen our protocol security with confidence.
We most definitely recommend working with 0xSimao to protocols and teams expecting professionalism.”— Superfluid
“As our Lead Senior Watson for the first audit competition of the Beraborrow codebase, 0xSimao demonstrated clear proficiency. He identified one third of the verified issues in a 6.2k SLOC codebase, a testament to his thoroughness and auditing skills. Additionally, his contributions during the fix review process were instrumental in uncovering further issues. His dedication to client security, transparent communication, and client success is exemplary.”
— Beraborrow
“We had the opportunity to work with 0xSimao as the Lead Senior Watson for the Mento x Good$ Integration audit. He identified multiple issues with exceptional thoroughness and ensured that each one was properly addressed and mitigated. We would be glad to work with him again in the future.”
— Mento
“0xSimao, during his audit with PoolTogether, was the sole auditor to discover a complex, high-severity issue that demonstrated his experience and deep understanding of the codebase. His thorough review was instrumental in ensuring the security and longevity of the core protocol.”
— PoolTogether
“0xSimao
is an absolute pro who really went above and beyond during our audit. It can be hard to find auditors like Simao who have such a high degree of integrity that they are willing to spend time verifying reported issues have been addressed correctly. Others just move on to the next project, but Simao was with us every step of the way. I cant recommend Simao enough, and we will definitely try to work with him in the future.”
— Nerite
Community Testimonials
Trusted feedback from the Web3 community on X
“Really excited to see 0xSimao joining Blackthorn as the 10th founding member. He proved it's still possible to crack the top 5 on Sherlock's leaderboard in this day and age, achieving it a few days ago.
And he's a really nice guy.”
— Jack Sanford
“What a legend! Thank you for sharing and it was our pleasure to be part of your journey. You are really one of the greats in the space. GG well played sir.”
— Three Sigma
“0xSimao is a beast, I really like his kind of findings, excelling at identifying tricky numerical corner cases. Sometimes I wonder if he's actually a human fuzzer. You should definitely check him on Solodit and take notes.”
— InfectedCrypto
“Giga-Senior SRs who can make $30k+/week all have something unusual you can't copy
(@zachobront, @deadrosesxyz, @0xSimao, @lonelysloth_sec, etc) (...)”
— Mackenzie
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Logos are for reference only. No endorsement implied.