Over a two-month period, contributed to backend and full stack development across livekit/agents-js and langchain-ai/langgraphjs, focusing on reliability and control in real-time systems. In livekit/agents-js, addressed a race condition in the TextAudioSynchronizer closure within AgentPlayout by refactoring closure logic and implementing conditional task cancellation, which improved audio playback synchronization and reduced shutdown errors. For langchain-ai/langgraphjs, enhanced the RemoteGraph API by propagating recursion limits and AbortController signals from RunnableConfig, enabling safer and more controllable remote graph executions. Work demonstrated strong proficiency in TypeScript, API integration, and test-driven development, with an emphasis on robust, maintainable code.