• Smart Contract Development: Proficiency in Solidity (Ethereum), Rust (Solana), or Move (Aptos/Sui) is essential. Ensure the company performs unit testing, uses secure patterns, and conducts audits (internal or via third-party).

• Consensus Mechanism Understanding: The team should understand PoW, PoS, or hybrid consensus depending on your use case (e.g., public ledger vs private chain).

• DApp Architecture: Ask how they approach decentralized app development using Web3.js or Ethers.js. Look for clear documentation and modular development practices.

• Token Standards & Integration: Experience with ERC-20, ERC-721, and ERC-1155, and integration with wallets like MetaMask and Trust Wallet is crucial.

• Security & Compliance: Inquire about how they manage reentrancy attacks, front-running, and gas optimization. Compliance with local regulations (e.g., KYC/AML) is also important for real-world apps.

• Deployment & DevOps: Familiarity with testnets (Goerli, Mumbai) and CI/CD pipelines for Web3 deployments adds operational value.

If the company shows fluency in both backend blockchain logic and frontend integration, you're on the right path. Always ask for previous project references and GitHub activity to verify capabilities.