A Jasmine Framework developer designs and implements testing frameworks for JavaScript applications. They write unit tests and end-to-end tests to ensure the software functions as expected. They use Jasmine, a behavior-driven development framework, for testing JavaScript code. This includes writing test cases, debugging, and ensuring code coverage. They also work with other JavaScript technologies and frameworks such as Node.js, Angular, or React. They collaborate with other developers to integrate testing solutions into the development process, promoting high-quality, reliable software. They may also be responsible for maintaining the testing infrastructure and improving testing methodologies.