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  • How to Prepare for a Solidity Developer Interview at a Layer 1 Blockchain

    Abdil Hamid

    Abdil Hamid

    @ForensicBlockSmith
    Updated: May 24, 2025
    Views: 1.1K

    What should I study to prepare for a Solidity Developer interview at a Layer 1 blockchain? I have an interview soon for a Smart Contract Developer role.

    I finished a six-month internship using Solidity. I can write and test basic contracts. However, Layer 1 protocols seem much more complex. I’m not sure if the interview will focus on protocol design, consensus mechanisms, or security.

    If you have experience with Layer 1 interviews, what topics should I review? Were there any tough or unexpected questions? What resources helped you prepare?

    I want to make sure my internship experience is enough. Any advice or tips would help a lot. Thanks!

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Replies

  • AlexDeveloper

    @Alexdeveloper • 10mos

    To prepare for a Solidity or Smart Contract Developer interview at a Layer 1 protocol, focus on mastering Solidity basics, smart contract security, and understanding how the EVM works. Be ready to discuss your past projects and demonstrate your problem-solving skills.

    Start by revisiting core Solidity concepts like functions, modifiers, and contract inheritance. Make sure you're comfortable with smart contract security best practices, especially common vulnerabilities like reentrancy and integer overflows. Since it's for a Layer 1 protocol, a solid understanding of how the Ethereum Virtual Machine (EVM) processes and executes smart contracts is key.

    Also, practice with development tools like Remix or Hardhat, and make sure you know how to write tests and optimize for gas efficiency. Interviewers will likely ask you to explain past projects, so be ready to walk them through your thought process and code.

    In some cases, you may even get a live coding challenge, so stay sharp and practice writing simple contracts from scratch. With a bit of preparation, you'll be in good shape for the interview—best of luck!

  • Sayali Bhandari

    @8n5KqIg • 9mos

    For a Smart Contract Developer interview at a Layer 1 protocol, expect technical questions around Solidity, blockchain fundamentals, and smart contract security.

    Focus on understanding gas optimization, common vulnerabilities like re-entrancy, and how consensus mechanisms impact contract execution.

    With 6 months of experience, you should be ready to discuss your projects, challenges you faced, and how you optimized code. Be prepared for questions on debugging, testing, and handling security issues. Brush up on Layer 1 concepts like transaction lifecycle, EVM workings, and gas models. Also, review the differences between consensus algorithms like Proof of Stake vs. Proof of Work and how they affect contract interactions.

  • Abdil Hamid

    @ForensicBlockSmith • 9mos

    Thanks guys for helping me

  • Shubhada Pande

    @ShubhadaJP • 4mos

    For frequently asked Solidity Interview questions, read our blog https://artofblockchain.club/article/top-30-interview-questions-for-senior-solidity-developers-in-2025

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