AI Automation & SaaS Engineer to Stabilize and Continue an Existing AI-Built Web App

We have a SaaS product that was built quickly with AI coding tools ("vibe coded"). It works at a prototype level, and we need an experienced engineer to review it, fix it and continue building. PHASE 1 SCOPE (fixed price, $400) - Review the existing codebase and give us a short written assessment of the issues and risks. - Fix the highest-priority bugs and stability problems. - Build or finish one or two core AI automation features (LLM integration, workflow or webhook automation). - Set up a clean deployment and write brief handover notes. After Phase 1, we plan to continue with the right person on further milestones or hourly work. WHAT WE'RE LOOKING FOR - Proven experience shipping SaaS products, not just prototypes. - Strong full-stack skills in a modern web stack (React, Node or Python, SQL or NoSQL databases). - Hands-on experience integrating LLM APIs and building workflow automations with automation platforms or custom code. - Comfort working in AI-generated code and fixing its weak points (structure, security, scalability). - Clear written communication and regular progress updates. TO APPLY, PLEASE INCLUDE 1. A past project where you took over or rescued an existing codebase, and what you did. 2. Your experience with AI automation or LLM-powered features, with examples or links. 3. Which stack you would choose for this kind of product, and why. 4. What you can realistically deliver within the $400 Phase 1, plus your availability and hourly rate for ongoing work.