Rebuild & Speed Up a Web Interaction Flow

I need a developer who can help me rebuild the steps of a specific appointment-booking flow on a public government website, but in a faster and more stable way.

The goal is to:

Inspect how the website loads each step

Capture the required requests, headers, cookies, and tokens

Understand the sequence of actions needed to complete the appointment process

Recreate the same flow using direct HTTP requests instead of browser-based actions

Make the process faster and capable of running multiple attempts in parallel

Provide a clean and well-structured implementation

This is NOT for bypassing any security, the process is fully public.
I just need to automate the steps of choosing a date/time and submitting the form in an optimized way.

Looking for someone experienced in:

Browser DevTools (Network tab)

HTTP request analysis

Session & token handling

Multi-threading

Python or Node.js (preferred)

Please share your experience with similar projects and your estimated cost & timeline.