I am delighted to apply for your position of software engineer. I've been a loyal user of your product for almost a decade now. When I came across your tech blog - in particular, the post "Rewriting the heart of our sync engine" - I was impressed by the engineering discipline depicted and went looking for your open jobs.
What can I offer Dropbox?
I am excited for the opportunity to work on a product I've used for so long, and appreciate your consideration for the position.