Smart Contract Interviews Evolve: From Basic Definitions to Advanced Security

The world of smart contract interviews has evolved significantly in recent years. Gone are the days when candidates were only asked about definitions of Solidity and Ethereum. In 2025 and 2026, hiring teams expect applicants to demonstrate a deeper understanding of EVM execution, security best practices, and architecture choices for various blockchain systems.

According to industry experts, smart contract interviews now evaluate three key areas: fluency in Solidity and EVM, security thinking, and architecture judgment. Candidates are expected to write secure code under pressure, reason about gas, and defend their architecture choices for decentralized finance (DeFi), Layer 2, and enterprise systems.

Interviewers also pay close attention to a candidate's ability to write efficient and secure smart contracts. They notice whether the candidate can write simple contract functions from memory and whether they still discuss integer overflow as it behaves in every Solidity version, despite changes introduced in Solidity 0.8.0 that cause arithmetic overflow and underflow to revert by default unless wrapped in an unchecked block.