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Aiguo Q.
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Aiguo Q.

Blockchain, NFT & Cryptocurrency | Blockchain Security, ERC-1155

I specialize in smart contract security with over 10 years of experience in cryptographic systems and more than 5 years focused on blockchain security and DeFi protocol auditing. I have a strong record of success in competitive audits, achieving top finishes and identifying critical vulnerabilities in complex systems. My expertise includes in-depth knowledge of EIPs and familiarity with prominent DeFi protocols like AAVE and Uniswap. I excel in manual auditing and use a range of tools, including Code4rena and Slither, to ensure the highest security standards. My previous role as Head of Blockchain Security Operations at a leading crypto platform honed my skills in protocol-level security and cryptographic key management. If you are looking for a knowledgeable engineer who can enhance the security of your blockchain project, I am ready to help you secure your assets and build robust solutions.

🇨🇳Shenzhen, China$70/hr100% JSS5.00 (1)Since Apr 2026

Earnings and projects

MRR
$238

Last 6 months ÷ 4.6 months active (since Jun 2026)

World#107,199 / 412k
🇨🇳Country#619 / 2,007
Revenue, last 30 days
$0

Last 6 months: $1.1k

Total earnings
$1.1k
World#386,036 / 412k
🇨🇳Country#1,910 / 2,007
Per project
$1.1k

$1.1k in the last 6 months

World#116,755 / 412k
🇨🇳Country#390 / 2,007
Projects, last 6 months
1
100% fixed0% hourly
World#128,092 / 412k
🇨🇳Country#730 / 2,007
Projects in all
1
100% fixed0% hourly
World#360,671 / 412k
🇨🇳Country#1,713 / 2,007

Earnings, last 30 days

$1.1kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$1,080$1,100$1,120Oct 8Oct 23Nov 7

Skill rankings: Top 14% in Solidity

Ranked by MRR among everyone on Upwork with the skill.

  1. #82Smart Contract554 freelancers · 🇨🇳 #1Top 15%
  2. #95NFT495 freelancers · 🇨🇳 #1Top 19%
  3. #115Solidity849 freelancers · 🇨🇳 #1Top 14%
  4. #347Cryptocurrency1,788 freelancers · 🇨🇳 #7Top 19%