Dear Sir/Madam,
I am an experience Software Engineer with several year experience in the industry.
Currently I wish to expand my skills with React and NodeJS.
I already worked on this stack on the past and enjoyed it.
I would be pleased to participate to the success of you project.
I'm ready to negotiate the rate as I'm more interested by the experience.
Looking forward to discuss the details with you.
Kind regards,
Marius