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I want to work with a Jmeter expert freelancer remotely for few hours this weekend. Im beginer to intermediate level with jmeter. I need a reusable JMX file that will let me stress-test our REST API. The flow is straightforward: first, the script must obtain an OAuth 2.0 access token and keep it available for every subsequent sampler; next, it should hit the file-upload endpoint and push a sample CSV using multipart/form-data. Please capture all correlation values (token, upload IDs, etc.) with regular expressions or JSON extractors so the run can scale with multiple virtual users. The test plan has to be cleanly organised with clear naming, user-defined variables for host, credentials, and file path, and a separate thread group ready for ramp-up tuning. Deliverables • A JMX f...

I need a single, well-crafted regular expression that will serve purely for data validation in a production system. I will share the exact input format and edge-case examples once we begin; for now, assume the pattern must be tight enough to reject malformed entries while staying performant. Please deliver: • The final regex, ready to drop into my codebase • A short explanation of the logic so future developers can maintain it • A minimal set of test strings that prove it works (valid and invalid cases) If you prefer look-ahead, look-behind, or other advanced constructs, that’s fine as long as they’re supported in PCRE, JavaScript, and Python engines—I’ll confirm the runtime before we start.