Hi,
Hope you are doing well.
> Seeking a JavaScript / NodeJs Developer for an ongoing project.:
I represent the European outsourcing company Scalamandra. We can provide you with the developer you need.
> Do let us know the most challenging part you will face, when working without any framework, like react. angular etc.:
In general - javascript libraries and frameworks are not a magic, as well as not a silver bullet.
Basically - it's just a collection of automations and improvements done by programmers community, proven ways and practices of development, collected for you just to simplify your job, not to do your job for you.
It's hard to say what will be the most challenging part, because, for example react (together with it's libraries) provides you code reusage, optimal rerendering (virtual dom instead of real dom), routing, data management, and so on...
First of all, worth mentioning that usage of SPA frameworks and libraries assumes that you build SPA application (all rendering happens on client side), so we should do something like reimplementing react
We can implement all that, but it will take time, and will not have much sense.
Finally, I can't differentiate one specific problem, general problem is implementing it all by myself.
Please send the project specification.
Thanks,
Oleksandr