Senior QA + Full-Stack Engineer — Make My SaaS Fully Launch-Ready

I'm looking for one person who can take ownership of making my SaaS truly launch-ready.

This isn't a "quick test" or "click around and send notes." I need someone who can go through the product like a real customer, find everything that's broken/confusing/unreliable, and fix it so it's ready to sell to real customers without surprises.

What I need from you:

• Treat this like a real launch: assume nothing works until you verify it
• Test the full customer journey end-to-end (landing page → purchase flow → account setup/login → dashboard → engine/product → saved progress → coming back later)
• Make sure every button, link, and workflow does what it says (no dead UI; if something isn't ready it should be clearly disabled or removed)
• Make sure the login/account system is secure and that each customer has their own data and saved progress that persists correctly (no cross-user leaks, no resets after logout)
• Stress test the core engine/product repeatedly so it works consistently and doesn't randomly fail
• Make sure errors are handled cleanly (no silent failures) and that basic logging/visibility exists so issues don't go unnoticed

Deliverables (required):

• A clear "Launch Readiness" checklist (pass/fail) covering the whole product
• A structured list of issues with severity + exact reproduction steps + screenshots/Loom proof
• Fixes applied (commits/PRs) and re-testing until critical issues are gone

A short handoff/runbook:

how to deploy, rollback, and where to view logs if something fails

How we'll work:

You test → you report → you fix → you re-test. We repeat until the product is clean and confidently sellable.

To apply, please answer:

• Have you done end-to-end hardening for a SaaS before (auth + payments/gated access is ideal)? Share 1 example.
• What's your plan for getting this to "launch-ready" quickly?
• What tools do you use to test thoroughly (manual + automated is a plus)?

If you're the type who likes owning the finish line and making things rock-solid, you're who I want.

Contract duration of 1 to 3 months.

Mandatory skills:

Amazon Web Services, Python, JavaScript, React, Software QA