Application Automation Workflow Setup

need to integrate a set of customised applications and create a set up

Key Requirements:
- understand a use case flow and integrate it and make it work
- Use React, Node, Flask, Selenium Grid/Hub,python,graphql, GO
- BDD framework

Ideal Skills and Experience:
- Proven experience in application integration
- Strong proficiency in React, Node, and Flask
- Selenium for automation, BDD
- Experience in developing cross-platform applications

Please provide examples of previous similar work.