Hi,
I have gone through your complete job description and available with required job skills as well as past experience to start this project right now.
I am a professional web developer having 8+ years of experience in web development. I have worked a lot with API Integration like Email newsletter API (Graphic Mail, Ebrain API, MailChimp, AWeber, Jot Forms) and social API(facebook, twitter, Open Graph), Moreoever, I have excellent experience in Twilio Text, Video, Voice Chatting, Firebase, Openfire XMPP, SMTP
Also, Rigorously worked with existing websites in which fixed bugs, implemented landing page, added plugins, customization, etc. So, I believe I fit for this job as my skills are totally matched with your requirements.
I am looking forward positively to work on your project and will not disappoint you in terms of quality of work, deadline, and communication. In case of any query please feel free to contact me.
Thanks & Regards
Surender S