I have a web application with API integrations, audit logic, and PDF/report generation that needs rigorous testing and bug fixing before launch. I built it myself on Base44 with zero knowledge about coding, but what I've built is good, but not good enough to launch to the public yet. I am finding it breaks often, won't implement fixes properly and if I fix something, something else breaks, but it's a very good working example of what I want as a finalised product and with some testing and fixes, and possibly some code improvements it could be launched. I need someone who can: 1. test the full workflow repeatedly, 2. identify bugs and edge cases, 3. implement fixes where possible, 4. retest after fixes. The app is already built, so this is a stabilisation/debugging role rather than a full rebuild, but I require someone who can build and possibly expose problems I didn't see, and suggest things to make it more robust. Are you comfortable working in that way, and have you done similar launch-readiness work before? Also, when issues are found, are you able to implement fixes directly in the codebase, or do you mainly provide QA reports for a separate developer?