You will get Fix, Complete & Deploy Your Vibe-Coded App (Lovable, Bolt, Replit)
Project details
Your Lovable, Bolt or Replit app was 90 percent done, then it broke, and the AI keeps "fixing" it into a bigger mess while your credits burn. I will get it finished and live.
12,900+ GitHub stars | 12 products shipped in 3 months | I build with these tools every day
What I fix:
Bugs, crashes and error loops in AI-generated apps
Supabase and Firebase auth and database rules
Stripe payments that will not go through
Almost-done projects that need the last 20 percent
Deployment: from preview link to live on your own domain
Every delivery includes a written summary of what was broken and what I changed, so you understand your own product.
Why work with me:
I ship my own products with these exact tools. You are not hiring someone who googles your error
Reading a broken codebase is my starting point, not a problem
You work with the developer directly. No account manager
Async by design: send the link and the error, get written progress. No meetings
Full source code, always yours
Send me your project link or the error before ordering and I will confirm the fix scope and package in my first reply.
12,900+ GitHub stars | 12 products shipped in 3 months | I build with these tools every day
What I fix:
Bugs, crashes and error loops in AI-generated apps
Supabase and Firebase auth and database rules
Stripe payments that will not go through
Almost-done projects that need the last 20 percent
Deployment: from preview link to live on your own domain
Every delivery includes a written summary of what was broken and what I changed, so you understand your own product.
Why work with me:
I ship my own products with these exact tools. You are not hiring someone who googles your error
Reading a broken codebase is my starting point, not a problem
You work with the developer directly. No account manager
Async by design: send the link and the error, get written progress. No meetings
Full source code, always yours
Send me your project link or the error before ordering and I will confirm the fix scope and package in my first reply.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$49
|
Standard
$245
|
Advanced
$995
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 10 days |
Number of Revisions | 2 | 3 | 5 |
Bug Investigation | |||
Fix Documentation | |||
Detailed Code Comments |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$25 - $150
Additional Revision
+$29Frequently asked questions
About Sizhen
Claude Code & MCP Developer | AI Agents, Automation & API Integration
Kowloon City, Hong Kong - 1:55 am local time
My open-source projects have earned 12,900+ stars and 2,600+ forks, all built in the last few months. Forks matter more than stars: 2,600+ means people run my code in production, not just bookmark it. Every project is public on GitHub — you'll find them in my Portfolio below, with the numbers you can verify yourself.
Most "AI agent developers" hand you a fragile n8n flow or a LangChain demo that breaks the first time real data hits it. I build systems that stay up. My a-stock-data toolkit (7,600+ stars) pulls from 15 data sources across 43 endpoints with automatic failover — when one source dies, it reroutes instead of crashing. That is the engineering I bring to your project.
The domain of my public work happens to be financial data, but the engineering — multi-source pipelines, agent orchestration, MCP servers — transfers to any industry.
WHAT I BUILD
🔌 MCP Servers & Claude Code Setups
I build Model Context Protocol servers so your agent reaches any tool, API, or database through one clean interface. Broken Claude Code configs — missing MCP integrations, hooks, permission models, runaway token use — are things I fix routinely.
🤖 AI Agents & Multi-Agent Systems
Agents that plan, call tools, and take real actions in your stack. My TradingAgents framework (2,500+ stars) runs 7 agents that debate and reach a decision together, with risk checks built in.
⚙️ Workflow Automation
n8n, Make, and custom Python for the manual work that eats your team's week — lead routing, CRM sync, reporting, document processing. Built to be maintained, not to fall over in a month.
🔗 API Integration
Connecting tools that don't talk to each other, with webhooks and custom code that survives rate limits, retries, and the source going down.
🛠 Fixes for AI / Vibe-Coded Apps
If an app from Lovable, Bolt, or Cursor is half-working, I clean up the code and get it shipped — and you own it, clean, afterward.
TECH STACK
AI/LLM: Claude, OpenAI, MCP, RAG, LangChain
Backend: Python (FastAPI), Node.js, TypeScript
Automation: n8n, Make, custom scripts
Data: PostgreSQL, Supabase, vector databases, multi-source pipelines
Frontend: React, Next.js
HOW I WORK
I work async and text-first. You get clear written updates, clean documented code, and a recorded walkthrough at handoff, so you can run and maintain the system after I'm done. No standing meetings, no black boxes — progress you can see at every step.
If you have an AI system that needs building, or one that's already broken, send me the details. I'll tell you exactly how I'd approach it before you spend a dollar.
Steps for completing your project
After purchasing the project, send requirements so Sizhen can start the project.
Delivery time starts when Sizhen receives requirements from you.
Sizhen works on your project following the steps below.
Revisions may occur after the delivery date.
Send your link and the error
You send the project link or repo and what is going wrong. I confirm the fix scope and package in my first reply.
Read the code and find the root cause
I read the broken codebase and find what is actually wrong, instead of prompting in circles.