Hello there,
As a seasoned Full Stack Developer mainly specializing in backend services and API development with JavaScript-mania also (I'm glad to tell you that I can handle both, and Laravel is my go-to PHP framework by the way), I believe I am the best fit for your project. My proficiency in user registration, login OTP feature development employing zender (whatsapp), twilio, and nexmo, among other SMS gateway providers well-positioned me to meet your exact needs. What more? I truly appreciate the inclusion of added security with the Login OTP feature -- it displays an awareness of the significance of user data confidentiality.
My experience cuts across diverse database management systems including MySQL, MariaDB, PostgreSQL & MongoDB. Admin Panel configuration management will not be daunting as I have a deep understanding of parameter setting dynamics.
Lastly, considering your time-sensitivity - you needing this project completed ASAP, hiring someone who can comfortably handle this kind of job without taking shortcuts would work great for you. With my undisputed proficiency in every layer of web development from UI design, API integration and Database management and excellent time optimization skills there is no doubt we will meet your one week deadline effectively without undermining quality.