%\def \username {Sage Vaillancourt}
%\def \thecompany {BananCorp}
%\def \jobandpronoun {PusherBoy }
%\def \skilltypes {broad, practical }
%\def \myskills {software design principles }
%\def \closingtext {I am looking forward to hearing from you}

%\def \body {
%    My name is \username.  I would like to work as \jobandpronoun with your
%    company.  I think my knowledge of \myskills will contribute well to your
%    team.
%
%    I am passionate about my work, and think we would work well together.
%
%    Thank you for your consideration.
%
%}

\documentclass[12pt]{letter}
\signature{\username}

\longindentation=0pt
\begin{document}
\begin{letter}{}

\opening{Dear \thecompany,}

\body

\closing{\closingtext,}

\end{letter}
\end{document}