Build Cross-Platform Flowchart Designer Desktop App

I'm looking for a highly experienced desktop app developer to build a cross-platform educational flowchart designer.
The project needs to be completed within 1 week, so please apply only if you have built similar applications before.

This tool is aimed at students and educators to create and interact with flowcharts in a simple, intuitive way.

Core Features (MVP):
- Create and connect basic flowchart shapes (Start, Process, Decision, etc.)
- Drag-and-drop UI with snapping and connectors
- Zoom, pan, and undo/redo functionality
- Save/load diagrams (JSON/XML or any standard format)
- Export as PNG or PDF

Requirements:
- Must run on Windows, macOS, and Linux
- Prefer frameworks like Qt (C++), Electron (JavaScript/Node.js), or Tauri
- Clean UI, responsive performance
- Strong focus on usability and stability

Ideal Candidate:
- Has built visual editors, diagram tools, or canvas-based apps
- Can show working examples of similar projects
- Is available full-time for the next 7 days
- Can communicate progress clearly and deliver fast
Timeline:
- Project start: As soon as possible
- Delivery: Within 7 days
- Bonus for early or polished delivery

To Apply:
Please include:
- Links or screenshots of similar apps you've built
- Your preferred tech stack
- Confirmation of availability to start immediately and finish within 1 week
- Any questions or suggestions you have about the scope

Looking to hire immediately - let's build something impactful, fast!