Custom Project Plan Web App

Project Description

We want to create a standalone desktop web app that mimics the high-level functionality of top online project plan software.  At the highest level, there will be a project information screen (support for many project plans), data entry screens, a  summary Gantt chart, about 4 levels of sub Gantt drill downs, a dynamic/flexible timescale, and a way to see additional information on a selected Gantt bar among other necessary screens.  The overall design should also be customizable and allow for live interaction (such as dragging a Gantt bar and seeing the effect or having related items rearrange accordingly).

We are looking for a full-stack all-star or team who can design a sharp interface and build out a final demoable solution.  In the end, we are custom building this solution to obtain a better handle on our project plan data so designs/implementations that help us meet our goal are preferred. 

We do not have a preferred tech stack at the moment and open source will be considered since cost is an important selection criterion. 

The final deliverable is a beautiful, tested, deployed, project planning application.