In December 2024, Mitya focused on stabilizing and accelerating test infrastructure for the githubnext/discovery-agent__facebook__react-native and facebook/metro repositories. He resolved Fantom test run deadlocks by introducing Buck2 isolation directories and sharing them across Jest processes, enabling parallelism through unique temporary build directories for each test. For the Metro testing framework, he enabled robust parallel test execution by optimizing port handling and configuration, supporting concurrent stress tests. Working primarily with JavaScript, Node.js, and build systems, Mitya’s contributions reduced flaky tests and improved feedback speed, demonstrating a deep understanding of integration testing and server configuration in complex CI/CD environments.