Is it just me that I find "stealth" startups seriously delusional in their own idea? Ideas are cheap, execution is difficult. Theranos was "stealth" startup to create investor impression of something like a SkunkWorks project.
"Abstain from applying if you have/expect a managerial/lead role. We need manpower, not decision makers." - You should really remove this clause from your job listing in future. It reflects bad on the position and gives no hope for the prospects to join and have a promising career that doesn't stall. It’s enough to just say “The position is for an Engineer”.