How can asynchronous document signing be implemented in a system?

Asynchronous document signing can be implemented using task queues and background workers. For example, when a request to sign a document is received, the system places the task in a queue (such as RabbitMQ, Redis Queue, or Celery), and a separate process or service in the background processes this task — signs the document and saves the result.

Example using Celery in Python:

from celery import Celery

app = Celery('tasks', broker='redis://localhost:6379/0')

@app.task
def sign_document(document_id):
    # document signing logic
    print(f"Signing document {document_id}")
    # save the result

# In the main application
sign_document.delay(document_id)

This approach allows not to block the main thread, respond quickly to the user, and process signatures in parallel.