[Referrer's Name] — [their title/role at Company Name] — suggested I reach out to you directly about the [Job Title] position. [One sentence on how you know the referrer and why they thought the introduction was worth making — e.g. "We worked together at Acme Corp for three years and she felt my background in data engineering maps closely to what your team is building."]

I have spent [X years] working in [relevant field or function]. My most recent role at [Employer] involved [key responsibility], where I [specific achievement with metric, e.g. "reduced pipeline errors by 40% and cut release cycles from two weeks to three days"].

What drew me to [Company Name] — beyond [Referrer's Name]'s recommendation — is [genuine specific reason: product, team, mission, challenge they're solving]. That's the kind of problem I want to be working on next.

I have attached my resume, and I would be glad to jump on a call at your convenience. [Referrer's Name] is happy to share more context if that's helpful.