I'm really not talking about something lengthy. But I get 100s of applications for every job post I publish. Most people who apply are frankly not qualified. If you are qualified, write a few sentences. "Hey, I saw your post for [...]. I thought this looked great for me because I have worked on [...] and I am super excited to learn more about [....]".

I am not asking for paragraphs, but show me you are interested. I honestly spend hours writing and reviewing the jobs I post and it takes probably 100+ hours total from a team to hire a person. We want to hire you, but you've got to help us. :)