Developing a loader or a custom software tool to interface with a hotel's payment gateway.

I need a purpose-built software loader that plugs directly into our hotel’s existing booking website and drives the entire 3-D Secure (3DS) payment flow required by our local payment gateway. The goal, as I noted (“احتاج الى اداة بمجية”), is a dedicated, robust component that can:

• Initiate the transaction, redirect the customer to the 3DS challenge, and capture the one-time password (OTP).
• Detect and handle every outcome—successful authentication, failed or expired OTP, user cancellation—and retry or abort in line with the gateway’s rules.
• Return the final authorised or declined status to our booking engine in real time so reservations update immediately.

The applicant must be a specialist software developer for financial systems; otherwise, the submitted proposal will not be considered.

I will embed this loader inside the current hotel booking system (“ضمن نظام الحجز أو الموقع الحالي للفندق”). All necessary access to our local payment gateway (“لدي بوبة دفع محلية”) is available so you can complete an officially supported integration.

Security, stability and clean error handling are critical acceptance criteria. Please outline your approach, preferred language or framework, and any relevant experience with 3DS, OTP handling, or payment SDKs when you respond.
Note: The freelancer must have worked on a similar software tool; otherwise, their submission will not be considered.Note: The freelancer must have worked on a similar software tool; otherwise, their submission will not be considered.