During October 2025, Faucct developed distributed job group functionality for the ydb-platform/ydb repository, focusing on backend development and distributed systems using C++ and Protocol Buffers. The work enabled coordinated execution of multi-container job groups by introducing a main job responsible for input and output streams, with group members distinguished by per-group indices. Faucct implemented APIs to query group elements by main_job_id and mechanisms for jobs to identify the main job via YT_JOB_COOKIE_MAIN_JOB_ID, improving orchestration and observability. This feature addressed the need for scalable and reliable job scheduling in complex workflows, demonstrating depth in distributed coordination and backend architecture.