Work sample test and structured interview for {role_name}

After shortlisting, assess candidates' skills with a work sample task, followed by an assessment and thorough evaluation.

How to structure the interview to assess skills and cultural fit for {role_name}

Work sample test (Home assignment)

Recruitment Bullet

Assess the candidate’s practical skills by assigning a real-world task similar to the work they would do if hired.

  • Title: Develop a Simple Decentralized Voting System
  • Objective: To evaluate the candidate’s ability to design and implement a basic decentralized application (dApp) using smart contracts on the Ethereum blockchain.
  • Requirements:
    • Develop a smart contract in Solidity that allows users to vote on a proposal.
    • Ensure that each user can only vote once and that votes are securely recorded on the blockchain.
    • Create a simple frontend using Web3.js to interact with the smart contract.
    • The contract should include functions to start voting, cast a vote, and tally results.
    • Provide a README file explaining the setup and usage instructions.
  • Time Frame: 5 days

Questions based on home assignment : 

Recruitment Bullet

Once done with work sample test evaluate the candidate’s technical proficiency based on the work sample task.

Technical questions

Recruitment Bullet

Duration : 10 minutes/question

  • Question: How would you ensure that each user can only vote once in your smart contract?
    • Expected Answer: The candidate should discuss methods such as using a mapping to track whether an address has already voted.
    • Sample Answer: "I would use a mapping in Solidity to track which addresses have voted. The mapping would be checked before allowing a vote, ensuring that each address can only vote once."
  • Question: What security considerations would you implement to prevent tampering with the voting process?
    • Expected Answer: The candidate should mention common blockchain security practices, such as using safe math operations and ensuring the immutability of votes.
    • Sample Answer: "I would ensure that all vote counts are immutable once recorded and use libraries like SafeMath to prevent overflow attacks. Additionally, I would design the contract so that the voting process cannot be interrupted or altered once started."
  • Question: How would you interact with your smart contract from the frontend using Web3.js?
    • Expected Answer: The candidate should explain how to use Web3.js to connect to the Ethereum network, interact with the smart contract, and call functions.
    • Sample Answer: "I would use Web3.js to connect to the Ethereum network, then instantiate the smart contract using its ABI and address. From the frontend, I would use Web3.js methods like contract.methods.vote().send() to allow users to cast their votes."

Behavioral questions

Recruitment Bullet

Duration : 10 minutes/question

  • Question: Describe a time when you had to overcome a significant challenge in a blockchain project. How did you handle it?
    • Expected Answer: Look for examples that show resilience, problem-solving, and the ability to manage challenges unique to blockchain technology.
    • Sample Answer: "In a previous project, we encountered a gas limit issue due to complex contract functions. I handled it by optimizing the contract code to reduce unnecessary computations, ultimately lowering the gas usage."
  • Question: How do you stay updated with the latest developments in Web3 and blockchain technology?
    • Expected Answer: The candidate should demonstrate an ongoing commitment to learning and staying informed about industry trends.
    • Sample Answer: "I regularly follow blockchain development forums, participate in online courses, and attend Web3 conferences to stay updated with the latest advancements and best practices."
  • Question: How do you approach collaboration when working on a blockchain project with a cross-functional team?
    • Expected Answer: The candidate should highlight effective communication, teamwork, and the ability to integrate feedback from various stakeholders.
    • Sample Answer: "I believe in clear and open communication. When working with a cross-functional team, I ensure that everyone is aligned on the project goals and regularly share progress updates. I also make sure to incorporate feedback from the team to refine the solution."

How to evaluate and compare candidates after interviews?

After interviews, it's important to evaluate and compare candidates based on a set of predefined criteria.Use scorecard to evaluate each candidate.

Recruitment Bullet

Sample scorecard based on pre-defined criteria. Here’s an example:

Criteria Rating (1-5) Comments
Technical Skills
Problem-Solving Ability
Creativity
Communication Skills
Cultural Fit

What criteria should be used to make the final hiring decision?

Final decisions should be based on the candidate's overall evaluation score, with a focus on important qualifications. Prioritize technical skills above everything else for a {role_name}, but do not forget about communication and cultural fit.

Recruitment Bullet

How to communicate the decision to candidates

Sample offer letter for {role_name}

[Your Company Letterhead]

[Date]

[Candidate's Name]
[Candidate's Address]

Dear [Candidate's Name],

We are excited to offer you the position of Web3 Developer at [Company Name]. Your expertise in blockchain technology and your innovative approach to problem-solving impressed us, and we believe you will be a valuable addition to our team.

Position: Web3 Developer
Start Date: [Proposed Start Date]
Salary: [Proposed Salary]
Benefits: [Details of Benefits]

Please review the attached terms and conditions of employment. To accept this offer, kindly sign and return the enclosed copy of this letter by [Response Deadline Date].

We look forward to your positive response and are excited about the prospect of working together.

Best regards,

[Your Name]
[Your Job Title]
[Company Name]
[Contact Information]

‍

Sample rejection letter for {role_name}

[Your Company Letterhead]

[Date]

[Candidate's Name]
[Candidate's Address]

Dear [Candidate's Name],

Thank you for your interest in the Web3 Developer position at [Company Name]. We appreciate the time and effort you invested in the interview process.

After careful consideration, we have decided to move forward with another candidate who more closely matches our current needs. This decision was difficult, given the strong skills and experiences you demonstrated.

We encourage you to apply for future openings that align with your skills and career goals. Thank you once again for your time and interest in [Company Name], and we wish you success in your job search.

Sincerely,

[Your Name]
[Your Job Title]
[Company Name]
[Contact Information]

‍

Hiring guide

About {role_name}

Job description

Source and shortlist candidates

Structured interview

Progression and salary