What IT specialists are needed to create "?" site?

Question

Web development

Hello!
Please tell me what kind of IT specialists and in what quantity may be required
at the first stage, when creating? a site that is technically comparable to such monsters as:
?.com and ?.com
Please rate the adequacy of my list:

1. Solutions Architect (Software engineer who determines the methods and technologies used)
   
2. Back-End Developer (Server part, security of client bases, online payments, stability of the site itself)
   
3. Database Developer (Databases)
   
4. Web Designer (Interface, etc.)
   
5. Frond-End Developer (JavaScript/HTML/CSS)
   
6. Mobile Device Developer (for a specific platform, if required)
   

What else should be clarified in terms of specialization and what terms can be expected
if the work takes place in the office?
Thank you in advance!

Answer 1

Key people:
1) Product owner - the one who has a vision of everything
2) conditional CTO - the one who is responsible for the technical implementation.
Both need to have full time.
For the rest of the participants, at the discretion of the CTO - as a rule, this is a designer, layout designer and backend programmer.
If the deadlines are off - the last 2 can be one person, but I would not advise.
Who exactly nafig is not needed at the start is the Database Developer.
Your first task is to make a quick MVP - if there is traffic, you will have time to change the architecture 10 times and rewrite everything again.
Whether mobile is necessary is an open question. I think yes, perhaps more than the web.
You have to understand that Apple has a very specific policy for approving this case - one of my good friends managed to push the application of a large betting site to the store - but it cost him half a year of live meetings.