2025-11 monthly summary focusing on key recruitment enhancements and stability fixes for OZ-Coding-School/oz_externship_be_03. Delivered attachments support, tag handling improvements, and presigned URL generation to streamline document submissions in recruitment postings. Fixed routing for presigned URLs and refined formatting, contributing to more reliable file uploads. Updated tests to reflect realistic scheduling for study groups, and aligned API/docs conventions with Swagger to improve developer experience and consistency. Overall, enhanced user experience, reduced submission errors, and strengthened code quality and test coverage.