Madis Lak built and integrated a new KernelBrowser API for the symfony/symfony repository, focusing on enhancing testability and session management within the FrameworkBundle. Using PHP and the Symfony Framework, Madis introduced direct session access through KernelBrowser::getSession() and improved the login() method to persist sessions across requests. This technical approach enabled more reliable browser tests and programmatic session control, streamlining continuous integration feedback and expanding test coverage for session-related flows. The work demonstrated a solid grasp of backend development and test-driven development patterns, delivering a targeted feature that addressed session management challenges without introducing or resolving any documented bugs.