Web3 Interview Question Bank
How to use this bank
This question bank is a reference for both hiring managers and candidates.
- Use difficulty tags to tailor questions to the role's seniority.
- Use "Follow-ups" to probe for depth and differentiate between good and great candidates.
- "Red Flags" and "Common Pitfalls" highlight frequent misconceptions or unsafe patterns.
- The scoring rubric provides a framework for consistent evaluation across interviews.
Solidity / Smart Contract Developer (EVM)
Designs, builds, and deploys the on-chain logic for dApps. Outputs are secure, gas-efficient smart contracts. Core tools include Solidity, Hardhat/Foundry, and Ethers.js.
Smart Contract Auditor
Specializes in finding security vulnerabilities in smart contract code. Outputs are detailed audit reports. Adversarial mindset is key.
Frontend dApp Engineer
Builds user interfaces that interact with smart contracts. Creates seamless and safe user experiences for dApps. Master of React, Ethers.js/Viem.
Community Lead / Community Manager
The heart and soul of a Web3 project. Manages Discord, fosters culture, and serves as the bridge between users and the core team.
On-chain Data Analyst
The on-chain detective. Uses tools like Dune Analytics to query, analyze, and visualize blockchain data to drive strategy.
DeFi Protocol Engineer
A specialized smart contract developer with deep knowledge of financial primitives and economic security. Builds complex DeFi systems.
L2 / Rollups Engineer
Works on the scaling infrastructure for blockchains. Implements and optimizes rollup technology, sequencers, and bridges.
Zero-Knowledge Engineer
Works at the cutting edge of cryptography, building privacy and scaling solutions using ZK-SNARKs and ZK-STARKs.
Token Economist / Tokenomics Designer
Architects the economic and incentive systems of a protocol. A blend of economist, game theorist, and strategist.
Backend Web3 Engineer
Builds and maintains the off-chain infrastructure that supports dApps, such as indexers, APIs, and relayers.
Cryptography Engineer
A highly specialized role focused on designing and implementing the cryptographic protocols that secure a blockchain.
DAO Operations / Governance
Manages the day-to-day functioning of a DAO. Facilitates governance, manages projects, and ensures smooth operation.
Security / DevSecOps for Web3
Secures the full stack of a Web3 company, from the smart contracts to the cloud infrastructure and frontend.
NFT / GameFi Product Manager
A specialized PM focused on the unique challenges of NFT collections and blockchain-based games.
Legal / Compliance Associate, Web3
Navigates the complex and evolving regulatory landscape of crypto. Advises on securities law, AML, and corporate structuring.
Product Manager, Web3
Defines the what and why of a decentralized product, balancing user needs, technical constraints, and community governance.
Appendix A: Universal Behavioral Questions
Describe a time you disagreed with a team decision. What did you do?
Look for the STAR method (Situation, Task, Action, Result). Ideal answers show constructive, data-driven disagreement and an ability to 'disagree and commit' if the final decision goes another way.
Walk me through the most complex project you've worked on.
Assesses communication and ability to simplify complexity. They should be able to explain the project's goal, their specific role, the challenges, and the outcome clearly.
How do you stay up-to-date with the rapid changes in the Web3 space?
Look for specific sources (e.g., Twitter lists, newsletters like Week in Ethereum News, podcasts like Bankless, research forums like ethresear.ch). Shows genuine passion and initiative.
Tell me about a time you had to learn a new technology quickly.
Crucial for Web3. Ideal answers describe a structured process: starting with docs, building a small project, seeking feedback, and iterating. It demonstrates their learning methodology.
What is a Web3 project you admire, and what would you improve about it?
Tests critical thinking and product sense. The admiration part shows what they value. The improvement part shows they can think critically and are not just a 'fan'.
Appendix B: Scoring Guide
This rubric provides a general framework for scoring answers. Calibrate with your interview team to ensure consistency. The goal is not just to find correct answers, but to understand the candidate's thought process, depth of knowledge, and communication skills.
- 1: Incorrect or Vague: The candidate provides a factually incorrect, dangerously incomplete, or nonsensical answer. They show a fundamental misunderstanding of the core concept.
- 2: Partially Correct: The candidate has some pieces right but misses key details or has significant misconceptions. The answer is not sufficient for a production environment.
- 3: Mostly Correct: The candidate understands the concept and can provide a mostly correct definition but struggles with nuance, trade-offs, or practical application. This is often a baseline for junior roles.
- 4: Correct and Nuanced: The candidate provides a correct and precise answer, can articulate the 'why' behind it, and can discuss some of the trade-offs or related concepts. They can connect theory to practice.
- 5: Expert / Teacher: The candidate not only gives a correct and nuanced answer but can also explain it with exceptional clarity using analogies or examples. They can discuss related edge cases, historical context, and future directions. They could teach the concept to others.
This question bank is for educational purposes only and is not a substitute for a comprehensive, real-world interview process. It is not legal or financial advice. All code snippets are examples and should not be used in production without extensive testing and auditing.