Hiring a Jasmine.js developer can significantly improve your web development process. Jasmine.js is a popular behavior-driven development framework for JavaScript which allows for easy and comprehensive testing. A Jasmine.js developer can write robust tests for your JavaScript code, ensuring its functionality and reliability. This can lead to fewer bugs, better performance, and improved user experience. Additionally, their expertise can foster a test-driven development culture in your team, improving overall code quality and maintenance. Therefore, a Jasmine.js developer can be a valuable asset to your web development project.