Build a web app based on existing Excel model

Project Description:
I am looking for a skilled developer to build a web app based on an existing Excel model. The main purpose of the app is data lookup and analysis. Our Excel model searches data from 3 sheets each having around 45000 rows.

Specific Functionalities:
- The client has provided a detailed list of functionalities that they want incorporated into the app.

Platform Requirements:
- The web app should be accessible only on desktop platforms.

Ideal Skills and Experience:
- Strong proficiency in web development
- Experience in building web apps based on existing Excel models
- Expertise in data analysis and visualization
- Ability to implement specific functionalities as per the client's requirements
- Familiarity with desktop web app development best practices

While not part of this project, future development will be to implement a payment gateway to monetize the app (NOT REQUIRED NOW).

PLEASE ONLY RESPOND ONCE YOU HAVE REVIEWED THE REQUIREMENTS AND THE ATTACHED SPEC SHEET. RESPONSES WITHIN THE FIRST 30 MINUTES OF POSTING WILL BE IGNORED