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0xSimao signature
0xSimao signature
  • Home
  • Private Audits
  • Contests
  • Testimonials
  • The Contest Academy
  • …  
    • Home
    • Private Audits
    • Contests
    • Testimonials
    • The Contest Academy
  • Search
Get A Quote
0xsimao@gmail.com
0xSimao signature
  • 0xSimao signature

    Expert Security Researcher

    28 Top-3 finishes & 60+ private audits

    Request An Audit
  • Audit Process

    A fast, transparent and effective approach

    1

    Quick Quote

    Contact me anytime; I’ll deliver an accurate quote in minutes, thanks to my deep expertise.

    2

    Security Review

    I’ll set up a dedicated GitHub repository and a real-time chat channel to share findings instantly. The review process will be manual with AI assistance, and I’ll create tests as needed.

    3

    Fix Verification

    I’ll thoroughly review your implemented fixes and all related code changes to confirm every issue is fully resolved and no new bugs are introduced.

    4

    Final Report

    You’ll receive a professionally formatted report including all the findings and corresponding fixes.

  • Why Trust 0xSimao?

    Focused on Your Security. Every Protocol. Every Time

    Arbitrum Logo

    28 Top-3 finishes

    Proven track record in public smart contract audit competitions, where auditors race to identify vulnerabilities, with $600K+ in prizes won.

    Maple Logo

    Led over 60 private audits

    I have conducted private security reviews across most blockchain domains, including many leading projects.

    Sherlock Logo

    2nd Place on Sherlock

    Sherlock has an Elo rating system for security researchers, with 9904+ officially registered accounts, placing me in the top 0.02%.

    Blackthorn logo

    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.

    Three Sigma logo

    Former Head of Security at Three Sigma

    I was responsible for the security department, having led 30+ audits.

    Code4rena logo

    Top-Ranked on Code4rena

    Code4rena is an audit contest platform, and I have ranked in the Top 3 over the past 90 days.

    Cantina logo

    Top-Ranked on Cantina

    Cantina is an audit contest platform where I have achieved Top-3 in 3 competitions.

    Superfluid Logo

    6 consecutive 1st places on Sherlock

    In competitions with hundreds of participants, achieving 6 consecutive 1st places is a statistical rare accomplishment.

    Mento Logo

    Exceptional Coverage

    I consistently identify the highest number of issues in audit competitions, including uncovering all vulnerabilities on multiple occasions.

    PoolTogether logo

    Solo Findings

    In most audits, I consistently discover unique vulnerabilities that go unnoticed by others, even in competitions with 600+ participants.

    Autonomint Logo

    Consistent Exceptional Performances

    During the Autonomint competition on Sherlock, I identified 38 High/Medium issues in just 26 days.

    Section image

    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

    Maple Finance logo

    “I've had the pleasure to work with Simao over the last few years where he has completed numerous audits for Maple Finance. Each time he's been thorough, finding niche issues missed in prior audits and helping us improve the design and security of the system. I would highly recommend him to audit any protocol.”

    — Maple

    Nerite logo

    “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

    Beraborrow logo

    “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

    Superfluid Logo

    “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

    Mento Logo

    “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

    PoolTogether logo

    “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

    Autonomint logo

    “During the Autonomint audit conducted alongside Sherlock, 0xSimao stood out for his remarkable expertise. He completely understood how the codebase works and uncovered 52% of the confirmed issues, a clear indication of his exceptional eye for detail and robust auditing capability. His proactive role in the remediation review further brought additional issues to light. We definitely recommend working with 0xSimao.”

    — Autonomint

    BMX logo

    It was a pleasure to work with 0xSimao as the Lead Senior Watson during our Sherlock audit contest for the Deli Swap contracts. He demonstrated deep knowledge of the underlying stack (Uniswap v4), discovered most of the high-level issues raised, and had great communication with us every step of the way. We would highly recommend him to audit a protocol and look forward to collaborating further on our protocol’s security in the future.

    — BMX

  • Community Notes

    Trusted feedback from the Web3 community on X

    Jack Sanford

    “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

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    Three Sigma logo

    “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

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     InfectedCrypto

    “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

    View Source Post
    Mackenzie Immunefi

    “Giga-Senior SRs who can make $30k+/week all have something unusual you can't copy

    (@zachobront, @deadrosesxyz, @0xSimao, @lonelysloth_sec, etc) (...)”

    — Mackenzie

    View Source Post
  • Fully Committed to Securing Your Assets

    Security you can trust from a proven Web3 expert

    Secure Your Protocol Now
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