Good day,
We have been working on ReactJS projects and most of them are large size Applications, so we have a team in house working on the following technologies:
ReactJS, AWS Cognito, AWS Route53, AWS PinPoint, AWS S3, AWS Lambda, AWS Dynamo DB, API Gateway.
Please share detailed specs, I can then take to my technical team lead and estimate it accordingly.
As far as communication is concerned, you really don't have to worry, as we assign a dedicated team lead, who's responsibility is to keep in touch with clients and keep showing progress time to time.
Look forward to hearing from you.
Regards,
YK
LEADconcept