As you're seeking an exceptional developer for your WHMCS and WhatsApp integration project, my profile and skills align effortlessly with your requirements. I'm Anant, a seasoned developer with adept experience in JavaScript, MySQL, Node.js, PHP, and most importantly WHMCS. Over the years, I've comprehensively demonstrated my abilities in website development and server administration. I'm familiar with popular control panels like WHM/cPanel and have an in-depth knowledge of mail servers. As a result, I'm adept at creating_notification systems tailored to various events including invoice issuance, payment reminders, account creation confirmation, service suspension notification etc.
My strengths also include finding innovative solutions to complex challenges - precisely the skill you'll need for integrating WhatsApp Business into WHMCS without relying on the official API. I can assure you an alternative method that will not only overcome the hassles arising from the validation and transformation of the number into an official business number but will also address your need for phone number validation during customer area registration.
In conclusion, hiring me not only ensures quality workmanship but also minimizing costs as I am comfortable working within your budget of $70 USD; though providing you excellent value in return is always my priority. Thank you for considering my proposal; It would be a pleasure to apply my skills to bring your preferred project to life!