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  • How to Prepare for Live Coding Interviews as a Junior Blockchain Engineer

    Jatin R

    Member

    Updated: Jun 2, 2025
    Views: 26

    How do I actually prepare for live coding interviews for blockchain developer roles?

    I’m a junior smart contract engineer with about a year of hands-on experience in Solidity and Ethereum, mostly building DeFi contracts and working on a few freelance projects.

    I’ve got a Blockchain Council certification and a computer science background, but live coding interviews make me pretty anxious, especially when I have to explain my thinking out loud. For those who’ve been through this, what should I focus on when practicing for these interviews?

    Are there common smart contract problems or security questions that come up a lot? Do interviewers expect deep knowledge of gas optimization or is it more about writing clean, secure code?

    I’m hoping to land my first full-time blockchain developer job, so any advice on how to prep for these interviews or manage nerves would be really helpful.

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  • Anita Patel

    Member • 1d

    Absolutely, here’s some advice that’s helped me and others get through blockchain live coding interviews.

    Really focus on practicing smart contract coding tests and debugging in a timed setting—set a stopwatch and try to solve real Solidity problems, like writing token transfers or access control logic.

    Interviewers almost always want you to talk through your thinking, so get comfortable explaining as you code.

    Don’t forget to check your work with edge cases, and use Hardhat or Remix for quick testing. Time management is huge, so practice solving problems fast but accurately.

    Also, brush up on security best practices and gas optimization since those questions come up a lot in Web3 technical interviews. If you hit a bug, don’t panic—just show how you’d debug it.

    The more you practice, the more confident you’ll feel when it’s time for the real thing. Good luck!

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