KRAFTJobs
Interview prep

Practice the work behind the question.

Choose a lane and role to see its real interview questions, what each tests, and a framework for strong answers. These are practice prompts and general guidance - not memorized scripts, and not every company interviews the same way.

Smart Contract Developer

Expect questions about smart contract programming, testing, and security patterns, plus a scenario where the role must respond to failed transactions, security findings, abnormal state, oracle or bridge failures, and upgrade emergencies. Interviewers are looking for evidence that the candidate knows where contract implementation and testing stop and independent audit sign-off and frontend ownership begin.

Open the Smart Contract Developer role guide
  1. Role fundamentals

    How do you define and test an invariant?

    Common follow-ups

    • Can you give a concrete example?
    • What would you do differently next time?
  2. Role fundamentals

    When is upgradeability justified, and what new risks does it create?

    Common follow-ups

    • Can you give a concrete example?
    • What would you do differently next time?
  3. Judgment

    How would you prepare a contract for audit and production deployment?

    Common follow-ups

    • Can you give a concrete example?
    • What would you do differently next time?

Weak-answer patterns

  • • Repeating jargon without specifics.
  • • Avoiding concrete examples.
  • • Claiming team outcomes as personal work.
  • • Presenting tools or follower counts as competence.
  • • Forked code with superficial changes
  • • Contracts with no tests
  • • Portfolio claims based only on testnet deployment

Self-review after practicing

ClarityRelevanceEvidenceDecision qualityBoundariesLearning
Build proof for these answers

Prepare with evidence

Build proof-of-workAnswers land better when backed by a real artifact - each role has a matching portfolio brief.Re-read the role guideThe role guide's boundaries and proof standards are exactly what these questions test.Get Hired journeyInterview practice is stage 11 - see how it fits before and after applications.