Do you need only developers? What about social media marketing?

I'm willing to share the reward if any other developers join me.
I'm a NodeJS web developer

Full Stack Developer here.
Without any doubts,it would take ages for a single developer to make a great product.Unless of course you're okay with a shitty looking less secure broken website.I have been in the start-up bubble for a long time now and I know it does need a team of at least 4 developers to make a descent website.

- > A HTML/Css developer [To convert designs into code]
- > A front-end developer  [To integrate code and of course look and feel of the website]
- > A Back-end developer [To write the API's and rest of the logic]
- > A guy who does end to end tests and security stuff.

As far as my time is concerned,I can do the entire architecture planning and the front-end code.If anybody has experience with python/Django can tag long as a back-end developer .I will write my code in React.js/Redux.

How about you post your requirement here.
But try finding a project manager instead.
For a project of this size, you will need multiple people working in tandem. And a competent manager would make sure everything stays under budget and the quality expected is maintained. I have managed such projects in the past.
A single developer could get the job done, but it won't be as functional as a proper functioning website and you'll eventually have to hire other people to fix things up.

Says a guy who has a negative feedback from Mitchell,the guy who rarely tags anyone.You got to be a special type of scammer to deserve a negative feedback from Mitch.From what I have known,OP isn't exactly the type of person who would take people like you seriously .. **scammers.