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  • How to Answer Common Smart Contract Security Mistakes in Blockchain Auditor Interviews

    Victor P

    Member

    Updated: Jun 2, 2025
    Views: 47

    How should I answer, “What are the most common mistakes developers make in smart contract security?” in a smart contract auditor interview? I want to sound knowledgeable and up-to-date, not just repeat generic points.

    I recently finished my internship as a smart contract auditor in the UK. I worked mainly with Solidity and Ethereum contracts. I have experience using Slither and MythX for audits. I know the OWASP Smart Contract Top 10 and have studied recent DeFi hacks.

    I am applying for full-time blockchain security roles in London. I want to show I understand real-world smart contract vulnerabilities like access control, reentrancy, and logic bugs.

    If you have tips for structuring a strong answer or examples from recent incidents, I’d appreciate your advice.


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  • David Lee

    Member • 3w

    Most smart contract security mistakes involve weak access control, reentrancy bugs, and missing input checks. Developers sometimes leave functions public or skip trusted libraries, which leads to overflows.

    Logic errors happen when teams rush testing or skip code reviews. Even experienced devs miss risks with external calls, especially in DeFi projects. Recent hacks, like flash loan exploits, highlight these issues.

    In interviews, show you understand both technical details and why audits, tools, and good documentation matter for blockchain security.

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