Hi {{first_name}},
[[Referrer name]] suggested I reach out directly. I applied for the [[job title]] position on [[date]] and wanted to make sure my application is on your radar.
My background in [[relevant experience]] maps closely to what the role requires, and [[referrer name]] thought it would be a strong fit based on [[brief context for the referral]].
Would it be helpful to set up a quick call?
[[Your name]]