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  • How to Prepare for a Solidity Developer Interview at L1?

    Abdil Hamid

    Member

    Updated: Mar 18, 2025
    Views: 1.0K

    I just landed an interview for a Smart Contract Developer role at a Layer 1 blockchain project, and I’m equal parts stoked and low-key panicking.

    Quick background: I did a 6-month internship where I worked with Solidity. I’ve got the fundamentals down (wrote a few basic contracts, played with testing/deploying), but tbh, Layer 1 protocols feel like a whole new beast. I’m not totally sure what they’ll grill me on—core protocol stuff? Consensus mechanisms? Security deep dives?

    If anyone’s been through a similar interview or works in this space:

    • What topics should I absolutely brush up on?

    • Any gotchas or curveball questions you’ve encountered?

    • Resources (books, repos, docs) that saved your life?

    Kinda worried my internship experience isn’t enough, but hey, gotta shoot my shot. Thanks in advance—y’all are legends!

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  • Alex Dowling

    Member • 6mos

    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!

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  • Sayali Bhandari

    Member • 5mos

    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.

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  • Abdil Hamid

    Member • 5mos

    Thanks guys for helping me

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  • Shubhada Pande

    Community Administrator • 2w

    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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