Dear Hiring Manager, I was excited to see the Software Engineer opening at {Company}. As a full-stack engineer who recently cut API latency by 40% on a platform serving 1M+ users, I'm drawn to the scale and craft your team is known for.
In my current role I shipped features end to end across React and Node.js, led a microservices migration that reduced infrastructure costs by $120K/year, and mentored four engineers. I care about clean, well-tested code and shipping outcomes — not just closing tickets. The {Company} mission to {mission} maps directly to the kind of high-impact engineering I want to keep doing.
I'd welcome the chance to discuss how I can help {Company} ship faster and more reliably. Thank you for your time and consideration. Sincerely, {Your Name}