Your AI-Built App Hit the Last 20% Production Wall. I Fix & Ship It—Without a Rewrite.
Aquarel (`aquarel.io`) is a senior software engineering practice specializing in AI-codebase rescue, security hardening, and production launches—without forcing a full rewrite. Founder & Principal Engineer Dositej Grbović surgically stabilizes broken Vibe-Coded Apps, scaling-wall SaaS products, and Stripe membership systems for Non-Technical Founders—starting with a free 20-minute Triage Call, a complimentary 48-hour Codebase Audit, and fixed-scope Rescue Sprints from $1,000.
subscriptions & profiles Anonymous clients can read billing records. Surgical Fix: Tenant-scoped RLS policies deployed.
Duplicate events create duplicate accounts and desync MRR. Surgical Fix: Idempotency locks installed.
80%+ of code is preserved—no rewrite needed. Verdict: Fixed-scope 6-day sprint resolves all blockers.
What Breaks at 80% Completion (And How I Fix It Without Rewriting Your App)
| Founder Symptom | Platform / Stack | Root Technical Cause | Surgical Fix & Typical Turnaround |
|---|---|---|---|
| "Every new prompt fixes one feature and breaks two others" | Claude Code, Cursor, Replit, Lovable | 3,000-line god-components and missing CLAUDE.md / AGENTS.md boundaries. | Modular refactor + Vibe-Safe Handover (5–10 days) |
| "Users get logged out randomly or anyone can query our database" | Lovable, Bolt, Supabase, Next.js | Permissive Supabase RLS, leaked service keys, and broken SSR cookie refresh. | RLS Lockdown & Auth Hardening Sprint (3–5 days) |
| "Customers pay on Stripe, but their account never upgrades" | Stripe, Next.js, MemberPress, WooCommerce | Unverified webhook signatures, race conditions, and subscription state desync. | Idempotent Webhook & Billing Rescue (2–5 days) |
| "Production SaaS slows to a crawl under real customer concurrency" | React, Next.js, Angular, PHP/Yii, Node, WebSockets | Unbounded re-renders, unindexed queries, or crashing WebSocket workers. | Scaling-Wall Refactoring Sprint (1–2 weeks) |
3 Core Rescue Pillars & 3 AI Platform Spokes
Vibe-Code App Rescue & Stabilization
Take your 80%-done AI app across the production finish line with secure auth, Stripe billing, and Vibe-Safe guardrails.
Scaling-Wall SaaS Refactoring
Eliminate frontend bottlenecks, state bugs, and legacy debt across React, Next.js, TypeScript, PHP, and Angular.
Membership & Stripe Billing Rescue
Stop silent MRR leaks from broken webhooks, failed renewals, and login lockouts on custom or WordPress portals.
Lovable + Supabase Rescue (RLS, Auth & Edge Functions)
Lock down wide-open Supabase Row-Level Security (RLS), fix magic-link/OAuth loops, and harden Edge Functions.
Bolt.new & v0 Next.js Rescue (App Router & Server Actions)
Stabilize App Router server/client boundaries, Server Actions, Stripe webhooks, and production Vercel/Cloudflare deploys.
Claude Code, Cursor & Replit Rescue (Vibe-Safe Handover)
Untangle 3,000-line AI god-components, stop prompt regression loops, and install CLAUDE.md, AGENTS.md & .cursorrules guardrails.
How We Rescue Your App in 4 Steps (Talk First, Free 48h Audit, Fixed Price)
Triage Call
Tell me what's broken. We talk live or connect async with mutual NDA protection before any repo access.
Free Initial Codebase Audit
Complimentary diagnostic of your RLS/auth security, Stripe billing, and architecture—with a plain-English Loom video and fixed quote.
Fixed-Scope Rescue Sprint
1–2 week sprint fixing P0 security and billing bugs in clean PRs, plus Vibe-Safe Handover guardrails for your AI stack.
Fractional TechOps Retainer
Ongoing month-to-month engineering stewardship (10–30 hrs/mo, zero lock-in) with staging deploys and PR reviews. Capped at 2 client slots.
Dositej Grbović — Founder & Principal Engineer
When you hire Aquarel, you never get passed to a junior subcontractor. I personally run every Triage Call, record every 48-hour Codebase Audit Loom, and write every rescue Pull Request.
- ✓ 8+ years shipping & stabilizing production software across React, Next.js, TypeScript, Supabase, PHP/Yii, Angular & WebSockets
- ✓ 4+ years as Frontend Tech Lead & Engineering Manager for a global B2B time-tracking SaaS platform used by millions
- ✓ Veteran Membership & Stripe Rescue Engineer (including hands-on production client rescues at MemberFix)
- ✓ Direct LinkedIn verification & mutual NDA shared automatically on Triage booking
Verified Production Rescues & Diagnostic Teardowns
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
Do I have to rewrite my AI-built (Lovable, Bolt, Claude Code, Cursor, or Replit) app from scratch? +
Almost never. In over 90% of Vibe-Coded Apps we audit, 80% of the UI components, user flows, and database schema are usable. Traditional dev agencies pitch $30,000–$80,000 rewrites because they do not want to read AI-generated code. I isolate the broken 20%—typically Supabase Row-Level Security, authentication cookies, Stripe webhooks, and monolithic god-components—and fix it surgically in 1 to 2 weeks.
How does the Free 48-Hour Initial Codebase Audit ($0) work, and is my repository safe? +
You never hand repository access to a stranger. First, we speak live on a free 20-minute Triage Call (or connect asynchronously within 1 business day), verify my direct identity and credentials, and sign a mutual NDA. Once read-only access is granted, I inspect your codebase within 48–72 hours and deliver a Red/Yellow/Green risk scorecard, a 10–15 minute plain-English Loom video walkthrough, and a fixed-price Rescue Sprint quote with zero obligation.
What does a Fixed-Scope Rescue Sprint or Fractional TechOps Retainer cost? +
The Initial 48-Hour Codebase Audit is $0 for qualified founders. Fixed-Scope Rescue Sprints start at $1,000–$1,500+ for a bounded 1–2 week stabilization sprint. If your live production checkout or auth is down right now, our 24–48 Hour Emergency Stabilization Fast-Track starts at $1,500. Ongoing month-to-month Fractional TechOps Retainers start at $1,000/month and are strictly capped at 2 active client slots.
Who actually writes the code when I hire Aquarel? +
Every Triage Call, 48-hour Codebase Audit Loom video, and production Pull Request is executed personally by Dositej Grbović, Founder & Principal Engineer at Aquarel (8+ years shipping and stabilizing production software, including 4+ years as Frontend Tech Lead & Engineering Manager for a global B2B time-tracking SaaS platform used by millions, plus veteran membership & Stripe rescue engineer at MemberFix). There are zero junior handoffs or anonymous subcontractors.
What is a Vibe-Safe Handover, and can I keep prompting with AI after the rescue? +
Yes. Every Rescue Sprint ends with a Vibe-Safe Handover: I modularize monolithic files into clean domain boundaries, lock critical auth and billing routes behind regression checks, and install custom CLAUDE.md, AGENTS.md, and .cursorrules instruction files directly inside your repository so future Claude Code, Cursor, or Lovable prompts do not break production.
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.