Which is better, AstraZeneca QA engineer or microbiology laboratory analyst?

Please ask first. Generally speaking, engineers must be higher than technicians.

If you know the difference between QA and QC, try to go in the direction of QA.

When an enterprise recruits in the market, QC can find it by collecting resumes online. Even an engineer may need to spend tens of thousands of dollars for headhunters to find QA, not to mention a QA with good spoken English. Which of these is important should be clear at a glance.