Skill Profile

Smart Contract Testing: Foundry, Hardhat

Contract testing: Foundry, Hardhat, fuzzing, fork testing, coverage

Blockchain & Web3 Smart Contracts

Roles

2

where this skill appears

Levels

5

structured growth path

Mandatory requirements

10

the other 0 optional

Domain

Blockchain & Web3

Group

Smart Contracts

Last updated

3/17/2026

How to Use

Choose your current level and compare expectations. The items below show what to cover to advance to the next level.

What is Expected at Each Level

The table shows how skill depth grows from Junior to Principal. Click a row to see details.

Role Required Description
Blockchain Developer Required Writes unit tests for contracts via Hardhat or Foundry. Tests basic flows: deploy, mint, transfer, revert. Uses console.log in Hardhat and forge test for debugging.
Smart Contract Developer Required Writes unit tests using Hardhat or Foundry. Tests deploy, mint, transfer, and revert cases. Uses fixtures for repeatable tests and achieves 75%+ coverage on new contracts.
Role Required Description
Blockchain Developer Required Writes integration and fork tests for contract interaction with DeFi protocols. Uses Foundry fuzz testing to find edge cases. Tests upgrade paths and cross-contract calls.
Smart Contract Developer Required Writes fork tests, fuzz tests, and integration tests for complex DeFi flows. Tests edge cases with Foundry cheatcodes. Achieves 95%+ coverage with meaningful test scenarios.
Role Required Description
Blockchain Developer Required Designs testing infrastructure for the organization: invariant testing, stateful fuzzing, formal specs. Configures CI/CD pipeline with automated security testing and coverage gates.
Smart Contract Developer Required Designs test strategy: invariant testing with Echidna/Medusa, stateful fuzzing, differential testing. Writes formal specifications and integrates into CI. Implements mutation testing.
Role Required Description
Blockchain Developer Required Defines testing methodology and standards for the blockchain organization. Establishes coverage, fuzz testing, and formal verification requirements. Coordinates testing infrastructure.
Smart Contract Developer Required Defines testing methodology for the organization. Establishes CI/CD pipeline with mutation testing, coverage gates, and invariant checks. Coordinates test infrastructure for 10+ projects.
Role Required Description
Blockchain Developer Required Defines enterprise testing strategy for smart contracts. Researches formal verification (Certora, K-framework) and mutation testing. Publishes testing methodologies and tools.
Smart Contract Developer Required Defines enterprise testing strategy for smart contracts. Researches automated test generation and formal verification automation. Publishes testing methodology and contributes to testing tools.

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