E-Commerce Web App Guidance -- 2

I’m in the planning phase of a new e-commerce web application and want an experienced software developer to act as my technical sounding board. My goal is to make confident architectural and stack decisions before I commit budget to full-scale coding.

Here’s the kind of support I’m after:
• A concise, written technical roadmap outlining recommended front-end and back-end technologies, database options, hosting and CI/CD flow.
• Two live consultation sessions (voice or video) where we discuss the roadmap, security considerations (payments, user data, GDPR), and performance/scalability planning.
• A follow-up code or diagram review once I draft the initial prototype.

I’m leaning toward a modern JavaScript stack (React / Next.js on the front end, Node or similar on the back end) but I’m open to your expert advice if you can justify an alternative. Prior experience launching high-traffic online stores, integrating popular payment gateways, and setting up automated tests will weigh heavily in my decision.

Please share a brief note on comparable projects you’ve guided, any e-commerce frameworks or libraries you recommend, and your availability for the first call.