QA Automation Engineer – Web3 (Europe)

Braintrust; United States; Remote; USD 41,000 - 58,000; Full time

Job summary

Braintrust is seeking a QA Automation Engineer for Web3 initiatives. The role focuses on rigorous manual and automated testing of web and mobile apps, validating cross-browser and cross-device behavior, and ensuring robust test coverage.

You will own Web3 flows, including wallet connections and on-chain vs off-chain states, plus third-party/CEX integrations. Remote-friendly, with collaboration across Europe, the US, and India time zones.

Qualifications

• 3–5 years in QA/quality engineering with manual and automated testing.
• Experience testing web and mobile apps across browsers and devices.
• Strong test-case design, execution, and regression discipline.

Responsibilities

Skills

Manual Testing

Automated Testing

Cross-browser

Web3 Testing

Smart Contract Testing

Test Automation Scripting

English Communication

Tools

Linear

Jira

Playwright

Cypress

GitHub Actions

CircleCI

Job description

• Rate: $36/hr
• Hours: 40 hours / week
• Experience: 3 - 5 years
• Location: Austria | Belgium + 15 more

Must-haves

• 3-5 years in QA/quality engineering, hands-on with both manual/functional and automated testing
• Experience testing web and mobile apps, including cross-browser (Chrome, Safari, etc.) and cross-device verification
• Solid test-case design, execution, and regression testing discipline (able to own recurring daily/regression sweeps)
• Working knowledge of core Web3 flows: wallet connections (MetaMask, Trust Wallet, WalletConnect), transaction signing, and on-chain vs off-chain behavior. Need to have smart contract + wallet testing experience
• Experience testing third-party/exchange (CEX) integrations end to end (e.g. Coinbase-style connect flows)
• Comfortable setting up and managing test accounts, credentials, and environments
• Clear, reproducible bug reporting and tracking in Linear (or Jira), with crisp repro steps and evidence
• Scripting ability in TypeScript, JavaScript, or Python at a working level
• Strong written English and ability to collaborate across US/Europe/India time zones

Nice-to-haves

• Hands-on with Playwright and/or Cypress (writing and maintaining tests, not just running them)
• Familiarity running tests in CI/CD (GitHub Actions, CircleCI)
• Experience with testnets or mocking Web3 providers
• Comfort using AI dev tools (Copilot, Cursor, Claude) to speed up test authoring
• Familiarity with blockchain explorers for verifying on-chain state
• Prior startup / fast-paced environment experience

Company: QA Automation Engineer – Web3 (Europe)
Location: Any time