Stripe Developer - Payment Integration review and setup for SaaS platform

We're a B2B SaaS running subscription billing on Stripe. It's live and mostly works, but things have gotten shaky. Webhooks fail and pile up, we had a couple of double-charge cases last month, and subscription status doesn't always match between Stripe and our own database. Now we want to add annual plans and usage-based (metered) billing on top - and honestly I'm not sure the current setup can handle that without breaking. So before we build anything new, we want someone who actually knows Stripe well to look at what we have and tell us straight whether it's solid. What we need: A review of our current Stripe integration - webhooks, idempotency, subscription sync, failed payments, PCI scope A clear list of what's risky and what to fix first Then help setting up annual + usage-based billing the right way Our stack: Node.js backend, React frontend, a couple of Laravel/PHP services, Postgres on AWS. Payments are Stripe (Checkout plus some custom flows). Please don't apply if you've only done this in tutorials - we want someone who's shipped real Stripe billing in production. Share one relevant example when you apply. Good chance of ongoing work if the first phase goes well.