To fix this, you need to establish a zero-ghosting hiring loop.
Both sides... employers and candidates... must commit to a strict, enforced 48-hour response protocol. When an introduction is made or an interview is completed, feedback must be provided within 48 hours. No exceptions.
This keeps the hiring funnel moving at startup speed and shows candidates that you respect their time. If you want to hire top-tier builders, you have to build an accountable hiring process that values communication... because respect is a two-way street.