Testing & QA

Debug Node.js with breakpoints, the inspector, CDP and heap or CPU profiles

Debug Python with pdb, breakpoints, post-mortem inspection and remote debugpy attach

Find the root cause of a bug before proposing any fix

Write a failing test first before any feature or bugfix code

Run verification commands and confirm the output before claiming success

Run a disciplined diagnosis loop on hard bugs and performance regressions

Replace type casts in test files with Shoehorn for partial test data

Build features and fix bugs test-first with red-green-refactor and integration tests

Smoke test a local agent API through a gateway tunnel and remote sandbox callback

Add regression tests that catch the blind spots of AI-written code

Run post-deploy browser checks for console errors, forms, visuals and accessibility

Trace every button through its state changes to find bugs where functions cancel out

Write, fix and de-flake C++ tests with GoogleTest, CTest and sanitizers

Write C# and .NET tests with xUnit, FluentAssertions, mocks and integration tests

Write Django and DRF tests with pytest-django, factory_boy and test-first workflows

Run Django pre-release checks for lint, migrations, tests and security scans

Write Playwright end-to-end tests with page objects, CI setup and flaky-test fixes

Write F# tests with xUnit, FsUnit, Unquote and FsCheck property tests

Block unsafe healthcare deployments with automated patient safety test suites

Test Kotlin code with Kotest, MockK, coroutine tests and Kover coverage

Write Laravel feature tests with PHPUnit or Pest, factories and Sanctum auth

Run Laravel checks for env, linting, static analysis, tests, coverage and security

Track downstream consumers for each module and rerun them after every change

Reproduce a bug as a failing test, fix it to green, then review and commit

Write Perl tests with Test2::V0, prove, mocks and Devel::Cover coverage

Write pytest tests with fixtures, mocks, parametrization and coverage targets

Test-drive Quarkus features with JUnit 5, Mockito and REST Assured

Run Quarkus pre-PR checks for static analysis, coverage and security scans

Test React components and hooks with React Testing Library, Vitest and MSW mocks

Test Rust code with unit, integration, async and property-based tests plus coverage

Write Spring Boot tests first with JUnit 5, Mockito, MockMvc and Testcontainers

Run Spring Boot builds, static analysis, tests and scans into a readiness report

Mock file systems, networks and APIs in Swift tests with protocol-based injection

Map requirements, risks and bugs to stable test IDs and find coverage gaps

Verify work with builds, type checks, lint, tests and a PASS or FAIL report

Write end-to-end tests for WPF, WinForms, MFC and Qt apps with pywinauto

Run exploratory QA on web apps to find bugs and write evidence-backed reports

Debug REST and GraphQL APIs by checking status codes, auth and schemas

Find why an n8n workflow execution failed or produced wrong output

Drive and test local web apps with Playwright, screenshots and logs

Check a running Next.js app in the browser after each edit, not just the compile

Debug errors and stack traces by tracing root causes before any change

Investigate bugs systematically to find root causes before any fix is applied

Find and fix bugs in browser, API, CLI, job, worker and webhook flows

Report bugs in browser, API, CLI, job, worker and webhook flows without fixing them

Find low-value or duplicate tests and the test-only code they keep alive

QA test a website or web app and score its quality from 1 to 5

Diagnose unclear failures and rank hypotheses with evidence before any edit

Fix a bug at the narrowest responsible layer and prove it with a regression test