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I am a software developer working and reading fun stuff which you guys keep posting and I love using all your work which really is providing me living. I am working as Full Stack Developer and I think I know basics of Internet. I earn real decent but I think more than earning I need to learn can you guys help me out on maxing things at life? I have a MacBook pro what shall I build if I have fun ideas and I know I can build it if I give it a try. Please tell me your ideas or needs and let me give it a try and yes I am not going to charge anything if you speak your heart out here or on Twitter :)
I have a screen which displays QR code on browser screen & at the same time it opens a Websocket connection with my backend(Spring). Once the payment is done a Webhook response comes to one of my backend endpoint with the payment state(success/failure) & other order details.
The application is working fine if it is running locally or with only single instance. But since we have our own Auto scaling group and load balancer configured over DNS, the connection is not getting established all the time.
So, how exactly shall this be architectured so as to scale the same horizontally? I don't have any DB configured as of now. I have thought of using SNS with SQS but it seems they are way too many overheads. How do big companies like WhatsApp scale?