Hi Nazmul, hope you are great!
By looking at the job details, I found myself qualified for this job!
I am a full stack javascript developer with Node.js/Express.js/MongoDB and I can start immediately but I want to know what hosting have you uploaded your site on?
I have worked on many projects from scratch of building APIs or full web applications using Nodejs where I worked on e-commerce, blogs, dashboards, and real-time web apps .
A few chatting in detail will give you the trust of skills that I have and How I can employ it to serve your job requirements and the value that I can provide for your project during the work and after it completed.
With Regards
Hamza A.