Jest Testing for Node.js/Express

I'm looking for a talented developer, ideally one who possesses solid experience with Jest, Supertest, Node.js, and Express in Typescript. The principal task of this project revolves around using Jest to perform comprehensive tests on our backend. The ultimate goal is to validate server functionality, fine-tune error handling, and notably, elevate code coverage. While it's not explicitly certain of the exact test coverage level needed for the project, having it as high as possible would be beneficial. Exceptional freelancers interested in this project should highlight their previous experience particularly concerning Jest tests and Node.js/Express based projects.