Urgent: Senior Backend Developer to Fix Stay22 API & Platform Bugs (Custom-Coded Site)

Hi everyone,We run a custom-coded travel metasearch platform called otelliyo.com and we are looking for a Senior Backend Developer to fix critical API integration issues and website bugs immediately. This is a one-time project, but we are looking for a reliable developer for long-term maintenance.Current Issues to Fix:Stay22 API Re-connection: We recently updated our primary email address on the Stay22 partner dashboard. Since then, the API connection has broken, and we cannot fetch or display hotel/pricing data. You will need to re-configure the API keys/Partner ID within our custom backend.Broken Affiliate Booking Redirects: Users are redirected to the booking pages, but because of the API mismatch/disconnection, the reservations are not being processed or tracked in the system.Contact Form Failure: The contact form on our website is broken. Submissions are not being sent or delivered. This needs to be debugged (likely an SMTP/mail server config issue).User Registration Feature: Our platform currently lacks a working user signup/registration system. We need this implemented and securely connected to our database.Required Skills:Senior-level experience in Backend Development (PHP/Laravel, Node.js, or Python—please specify your tech stack in your application).Proven experience with Travel Affiliate APIs (Specifically Stay22, Booking.com, or Expedia APIs).Strong database management skills (MySQL, PostgreSQL, or MongoDB) for custom registration systems.Experience with SMTP, mail routing, and secure API data handling.Please apply with your estimated timeline, hourly or fixed rate, and examples of custom-coded platforms or travel APIs you have worked on before.Thank you!