footnote.tex

\documentclass{article}

\usepackage[symbol]{footmisc}

\footnotetext[1]{Développeur}
\footnotetext[2]{Contributeur}

\newcommand\footdevelop{\footnotemark[1]}
\newcommand\footcontrib{\footnotemark[2]}

\begin{document}

Text with first footnote\footdevelop
and more text with a second footnote\footcontrib.

In this a paragraph we have a reference to the first
footnote\footdevelop.

\end{document}