Continue to process a request after the client response has been sent

Serverless Framework
1

So, is it possible to continue to process a request after the client response has been sent?

I have an serverless API, and one of its request takes usually 10-18 seconds to finish, and always returns 200, so what I wanted to do is send 200 to the client as soon as the request comes, and then actually handle the request. WHen I coded like this, it worked fine on serverless offline, but when I deployed it on aws lambda, it ended the request right after returning the 200.

I’m sorry if this is something dumb, but I searched everywhere and can’t find an answer.

Here is my serverless.yml

org: my org

app: streetprogram ming-ploomes-esta f-app
service: streetprogramming-ploomes-estaf

provider:
  name: aws
  runtime: nodejs12.x
  timeout: 30
  memorySize: 512
  environment:
    PLOOMES_USER_KEY: ${file(env.yml):PLOOMES_USER_KEY}
    D4_SIGN_TOKEN_API: ${file(env.yml):D4_SIGN_TOKEN_API}
    D4_SIGN_CRYPT_KEY: ${file(env.yml):D4_SIGN_CRYPT_KEY}
  iamRoleStatements:
      - Effect: "Allow"
        Action:
          - "dynamodb:*"
        Resource:
          - ""


functions:
  ploomesChangeStageWebhook:
    handler: src/ploomesChangeStageWebhook.handler
    events:
      - http:
          path: ploomesChangeStageWebook
          method: post
  d4signOnDoneWebhook:
    handler: src/d4signOnDoneWebhook.handler
    events:
      - http:
          path: d4signOnDoneWebhook
          method: post

plugins:
- serverless-offline