AWS Lambda + API gateway + S3 + cloudfront Since you have chosen AWS, you can use CDK for Infra-as-code. I had an SPA that was just static HTML + CSS + js tha

AWS Lambda + API gateway + S3 + cloudfront Since you have chosen AWS, you can use CDK for Infra-as-code. I had an SPA that was just static HTML + CSS + js that used AWS Lambda + API gateway for the server side functions with the static site deployed on a public S3 bucket and distributed through cloudfront. I had longrunning background tasks for which I used Fargate. You may use Fargate or ECS depending on how you want to optimize your budget.