Worked on the redis/redis repository to enhance the reliability of stream processing components, focusing on system programming and C development. Addressed a critical bug in the streamReplyWithRangeFromConsumerPEL function by correcting the stream ID comparison logic, which improved the accuracy of stream data handling in consumer-group workflows. The solution ensured correct behavior when the end parameter was NULL, preventing logical errors in group-based stream commands. This work emphasized stability and maintainability over new feature development, demonstrating proficiency in debugging complex C code and integrating targeted fixes to support large-scale deployments and maintain robust data processing in streaming environments.