Solidity Developer Assessment Template
senior-level solidity developer assessment with hand-vetted prompts on storage layout & gas costs, reentrancy & checks-effects-interactions, foundry / hardhat testing, plus a reviewable session timeline. Solidity bugs cost real money; the strongest candidates write Foundry tests reflexively and discuss reentrancy, oracle manipulation, and upgrade paths without prompting.
What this template measures
Every skill needed for a solidity developer hire, covered across MCQ, coding, and essay questions.
Storage layout
Storage layout & gas costs
Reentrancy
Reentrancy & checks-effects-interactions
Foundry / Hardhat testing
Foundry / Hardhat testing
Upgradeability patterns
Upgradeability patterns (UUPS, Beacon)
Common standards
Common standards (ERC-20, 721, 4626)
Audit-grade documentation
Audit-grade documentation
Sample questions from this template
A preview of the questions you'll see when you use this template.
Which of these is the most idiomatic way to handle storage layout & gas costs in production?
- A.Hand-rolled implementation with no library support
- B.Battle-tested library + thin abstraction
- C.Copy from the latest blog post
- D.Avoid the pattern entirely
A solidity developer reports a regression in reentrancy & checks-effects-interactions. Which signal is MOST likely to identify the root cause?
- A.Application logs at INFO level only
- B.Recent deploy diff + relevant trace
- C.Number of open tickets
- D.Restarting the affected service
Implement a small module that demonstrates foundry / hardhat testing. Include unit tests for happy path and one edge case.
Hint: Prefer clarity over cleverness; tests count.
Refactor the supplied snippet to fix a subtle bug in upgradeability patterns (uups, beacon) without changing the public API. Explain the fix in 2–3 sentences.
Hint: Read the tests; they encode the contract.
In 200–300 words, describe how you'd evaluate a tradeoff between storage layout & gas costs and common standards (erc-20, 721, 4626) on a real project.
Walk us through a recent solidity project where reentrancy & checks-effects-interactions was the deciding factor. (90 seconds)
Scoring rubric
How candidates are evaluated on this template.
Frequently asked questions
Who is this Solidity Developer assessment template for?+
Hiring teams screening solidity developers at senior level. Solidity bugs cost real money; the strongest candidates write Foundry tests reflexively and discuss reentrancy, oracle manipulation, and upgrade paths without prompting. Use it for inbound applicants, sourced candidates, or as a take-home equivalent before live interviews.
Can I customize the Solidity Developer template?+
All of it. We ship the Solidity Developer assessment as opinionated defaults, but every layer (questions, rubric, weights, time limits, integrity strictness, candidate-facing copy) is configurable per job.
Does this Solidity Developer template include AI cheat detection?+
Built in. The Solidity Developer template doesn't need extra setup for cheat detection — it's running silently from the candidate's first keystroke and surfacing flags only when something looks off.
Can solidity developers preview sample questions before the timer starts?+
Yes. The Solidity Developer template supports unscored practice questions so candidates warm up before the timed section starts. You're measuring skill, not test anxiety.
How do I reuse this Solidity Developer template across multiple jobs?+
Save your edited Solidity template as a private template, then attach it to any future job. Question pool, weights, and rubric persist; the candidate-facing copy can be tuned per req.
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