We are the founders of a B2B SaaS application built in React Native, designed for the hospitality industry. Our current application is a digital menu binder for restaurant servers. We are preparing for our next major development phase: integrating an **AI-driven testing and grading engine**. **Current Status:** The base application (Frontend: React Native, Backend: Firebase/Node) is near completion. Before authorizing the full build of the AI features, we are looking to interview experienced backend/AI developers to discuss the technical architecture and ensure it aligns with our vision. **The Upcoming Scope of Work:** 1. **AI Integration:** Connect our database to an LLM (OpenAI GPT-4o or Gemini). 2. **Automated, Scheduled Generation:** A manager sets a recurring schedule (e.g., Weekly, Monthly). The system must automatically pull dish details and generate a balanced test by selecting an equal number of questions from specific menu categories (Appetizers, Mains, Sides, Desserts, Drinks). 3. **Semantic Grading:** The AI must evaluate the server's typed response against the database's factual description and return a Pass/Fail semantic score (e.g., "Did they mention the peanut allergy?"). 4. **Cheat-Proof Mechanism:** A backend/frontend synced logic that automatically fails a test if the app loses focus (backgrounded) while a test is active. 5. **Manager Dashboard:** An API to store and serve the historical JSON blobs of these test results to a manager's performance dashboard. 6. **Adjustable Grading Strictness:** A backend variable controlled by a manager's UI slider (e.g., Strict vs. Lenient), allowing managers to adjust the AI's grading prompt and margin of error based on their restaurant's needs. **Who We Are Looking For:** - **INDEPENDENT FREELANCERS ONLY.** Please do not apply if you are an agency. - Proven experience building and scaling backends (Firebase or Node.js/PostgreSQL). - Deep experience integrating and prompting AI APIs (OpenAI / Gemini) for data evaluation, not just chatbots. - Strong English communication skills for technical scoping calls. **How to Apply:** Please begin your proposal with the word "CHEF" so we know you read this. In your proposal, briefly describe a similar project where you used an AI API to evaluate or grade user-submitted text data against a strict database of facts. *(Note: We are interviewing candidates this week to select our lead developer for this upcoming phase).*