Seeking Solution Architect to Design a Scalable Backend for a Travel Platform

I'm in the early planning stages of designing the backend architecture for a new platform, and I'm looking for an experienced solution architect to help me make the right long-term technology decisions before development begins. This is an architecture and consulting project—not a coding project. The Project The platform will require: A scalable backend architecture A flexible database capable of supporting rich content and structured data APIs for web, mobile, and future integrations User authentication and partner management Integration with third-party services such as booking systems A design that is well suited for AI-powered search, recommendations, and future automation I'm currently researching technologies such as Supabase, Firebase, AWS, Xano, and other modern backend platforms, but I'm open to recommendations. I'm looking for someone who can help evaluate the available options and recommend the most appropriate long-term architecture based on my goals—not simply recommend the technology they happen to use most often. What I'm Looking For Rather than immediately building software, I'd like to begin with an architecture consultation. I'm looking for someone who can understand the business goals, identify the major technical decisions that should be made first, explain the trade-offs between different approaches, and help create a roadmap before development begins. What I'd Like You to Propose Rather than prescribing the engagement, I'd like you to recommend it. Please include: How you would structure this consultation. The deliverables you would provide. Your estimate of the time required. Whether you recommend a fixed-price or hourly engagement. Your estimated cost. Please Include in Your Proposal A brief description of a platform or SaaS product you helped architect. Which backend technologies would you initially consider for a modern, AI-friendly platform, and why? Your experience integrating third-party APIs or booking systems. What do you believe are the most important architectural decisions to make before development begins? Please begin your proposal with the word "Blueprint" so I know you've read the entire job description.