As a veteran backend developer with a broad skill set, including HTML, MySQL, PHP, WordPress, and website design, I can guarantee a dynamic and high-performing backend solution for your website. Having spent years honing my expertise in developing custom websites, I understand the importance of user-friendly design and optimal user experience (UX). Therefore, I assure you that I will build an Android mobile-friendly CMS using WordPress, leaving no stones unturned in terms of not only translating seamless frontend integration but also ensuring the utmost in website performance.
Additionally, I have extensive experience working with different APIs which will enable me to seamlessly integrate WhatsApp and E-mail APIs into your site. Moreover, focus is not merely on building your backend - but on creating a solid structure that is future-proof and readily accommodates modifications if required.
Lastly, the budgetary concerns outlined in your project have always been important to me as a freelancer. Although my service is worth much more than 8000 Indian Rupees for such intricate work; I believe in forming long-lasting relationships - built on trust and delivering quality at reasonable pricing. Rest assured, I am sincerely committed to delivering an outstanding backend solution within your timeline and budget constraints.