Overview of Tech stack and data flow and advice on changes needed

As a part of a comprehensive review of my tech stack and data flow, I want to get advice on potential changes. My particular area of concern is scalability. I am in need of an expert who can analyze my technology stack and data flows, suggest areas that could be optimized, and recommend any potential changes. The right candidate should have extensive knowledge of tech stacks in e-commerce, as well as experience making recommendations for optimal scalability. The job will require not just a review of my existing stack, but also in-depth analysis and advisement.