I have 15+ years experience of designing, developing and implementing large apps. One of the site uses ChartJS with Lambda and DynamoDB. Besides a number of our apps are on AWS serverless architecture (Lambda, DynamoDB, API gateway, SAM etc.). We are AWS Registered partner.
Your requirement for ChartJS rendering on serverside is a little different however we will get comfortable before we get on a call. Thereafter, with the kind of experience that I have I should be able to help you achieve your objective. We are also deep into machine vision and image processing so we are well aware of the ecosystem.
To answer your utmost requirement, we are very good in Serverless Framework and Lambda.
About us: We are from VisionFirst Technologies Pvt. Ltd. We are researchers and practitioners of cutting edge technology. We have designed, developed and implemented large insurance solutions (multiple mobile apps, webapps and custom softwares) with a few applications having 5000+ authenticated users. We have experience on multiple clouds such as Jelastic, AWS, Azure. Our tech stack includes Machine Learning, offline/2G tolerant mobile apps, web applications, IOT and Analytics. Our business domains include insurance (Insurtech, Fintech), education (Edutech), Sports and logistics.