Membership Site & Stripe Billing Stabilization
Aquarel stops active recurring-revenue leaks across custom SaaS billing systems, Stripe integrations, and WordPress/MemberPress/WooCommerce membership portals. Backed by hands-on production rescue pedigree at MemberFix, Principal Engineer Dositej Grbović fixes broken webhook handlers, subscription state drift, checkout failures, and authentication lockouts in rapid Rescue Sprints starting at $1,000–$1,500.
Symptom → Root Cause → Surgical Fix Table (Stripe Billing & Webhooks, Next.js & Supabase, MemberPress)
| What You Experience | Why the AI Agent / App Is Stuck | Aquarel's Surgical Engineering Fix |
|---|---|---|
| Customers complete Stripe Checkout, but their membership tier or SaaS account stays locked | Missing or failing webhook signature verification, unhandled checkout.session.completed races, or timeout errors. | Implement signature-verified, idempotent webhook processing with dead-letter retry safety and state reconciliation. |
| Cancelled or past-due subscribers retain free access while active paying members get locked out | Desynchronized local database status fields vs. canonical Stripe customer.subscription.updated/deleted events. | Build deterministic subscription state machines and run automated Stripe-to-database entitlement reconciliation. |
| Membership login loops, caching conflicts, or plugin updates break checkout during a live campaign | Aggressive CDN/page caching on authenticated routes, conflicting payment scripts, and unguarded live updates. | Isolate authenticated cache-control headers, decouple conflicting hooks, and enforce staging-first checkout tests. |
| Duplicate subscription charges or double-provisioned accounts when Stripe retries slow webhooks | Webhook endpoints lacking database event-ID idempotency locks and transactional row updates. | Introduce an atomic stripe_events idempotency table and wrap entitlement mutations in strict database transactions. |
What Happens in Your Free 48h Codebase Audit vs. Your Fixed-Scope Rescue Sprint
What I Check in Your Free 48h Codebase Audit
- 1. End-to-end Stripe webhook event log, signature verification, and idempotency key audit
- 2. Database entitlement vs. active Stripe subscription state reconciliation diagnostic
- 3. Checkout funnel, renewal lifecycle, and authentication session/cache header inspection
- 4. 10–15 minute plain-English Loom walkthrough + prioritized Red/Yellow/Green revenue-protection plan
Your "Vibe-Safe Handover" Deliverables
- 1. Idempotent, signature-verified Stripe webhook pipeline handling upgrades, renewals, and cancellations
- 2. Reconciled subscriber database records eliminating ghost access and false lockouts
- 3. Hardened authentication, password/magic-link recovery, and cache-bypass rules for member areas
- 4. Automated billing health checks + Vibe-Safe Handover documentation and Loom walkthrough
Stop Silent MRR Bleed From Broken Webhooks & Auth Lockouts
Nothing erodes founder trust faster than a paying customer who cannot log in—or silent webhook failures that leak thousands in monthly recurring revenue. With hands-on rescue experience at MemberFix (memberfix.rocks) and deep full-stack Stripe architecture expertise, I make your billing and entitlement pipeline rock-solid.
Deterministic Subscription State Machines Across Custom SaaS & Membership Portals
AI-generated billing code and brittle membership plugins routinely rely on client-side redirect URLs instead of verified server-to-server webhooks. I replace fragile checkout callbacks with cryptographic signature verification, database-enforced event idempotency, and automated state reconciliation.
See the Proof Before You Book a Call
Stopped active subscription revenue bleed, restored reliable self-serve member onboarding and renewals, and gave non-technical operators peace of mind during high-volume launches.
How to fix non-idempotent Stripe webhooks, subscription state drift, and Next.js App Router boundary leaks in Bolt.new and Vercel v0 applications.
See the exact Red/Yellow/Green risk scorecard, 12:40 plain-English Loom walkthrough chapters, and fixed-price $1,400 sprint roadmap you receive for free.
Why Non-Technical Founders Hand Over Production Keys With Zero Anxiety
Talk First Before Repo Access
Meet Dositej live on a 20-min Triage Call, verify credentials, and sign an NDA before granting repo access.
"Do No Harm" Staging & PRs
No editing live production files. Every fix ships in isolated PRs tested in staging with rollback safety.
10–15 Min Loom Walkthroughs
Every audit and sprint includes a plain-English video walkthrough of the root cause and the fix—zero jargon.
100% IP & Vibe-Safe Handover
You own all code, keys, and custom CLAUDE.md & AGENTS.md guardrails so future prompts never break production.
Frequently Asked Questions
Our checkout or membership login is broken right now—how fast can you step in? +
Select 'Production Emergency' on the /triage page to trigger our 24–48 Hour Emergency Stabilization Fast-Track (starting at $1,500). It dispatches an immediate mobile alert to Dositej with a 2–4 business hour response commitment.
Do you rescue both custom Next.js/Supabase Stripe apps and WordPress/MemberPress sites? +
Yes. Having rescued production membership sites at MemberFix alongside custom React/Next.js/Supabase SaaS platforms, I diagnose and fix billing pipelines across both modern TypeScript stacks and WordPress/MemberPress/WooCommerce portals.
How do you fix Stripe webhook desynchronization without double-charging customers? +
All webhook fixes are built around strict event-ID idempotency tables and read-only reconciliation scripts before applying state updates in staging and production.
What does the initial 48-hour billing & codebase audit cost? +
The initial 48-hour Codebase Audit is $0 and zero obligation after our 20-minute Triage Call and mutual NDA.
Can you audit historical Stripe events to find out how many subscribers were affected by a webhook bug? +
Yes. During the Rescue Sprint I run a read-only reconciliation diff between your canonical Stripe customer/subscription records and your application database so every affected member account is accurately restored.
Ready to Find Out What's Actually Broken—For Free?
Book a 20-minute Triage Call or send your broken app asynchronously. We talk first, sign a mutual NDA, and if we're a fit, I deliver your 48-hour Codebase Audit and Loom walkthrough at zero cost.