Question $1($Engineering contracts and law$)$

$1\mathrm{.}1$ Assess the validity of the following offer in accordance with contract law principles and conclude on whether the offer is valid or not.

John, a recent graduate with an advanced diploma in engineering, has been actively seeking job opportunities in his field. He receives an email from XYZ Engineering Company, which reads:

"Dear John,

We are impressed with your qualifications and experience and would like to offer you a position as a Junior Engineer at XYZ Engineering Company. The terms of the offer include a starting salary of R$350,000$ per year, full health benefits, and opportunities for career advancement within our company. If you accept this offer, please reply to this email with your acceptance.

Sincerely, $[$HR Manager$]"$