Egor Perevalov focused on backend development and database migration for the kotopesp/sos-kotopes repository, addressing a critical issue in the migrations workflow. He resolved a bug that previously caused migration discovery failures by removing the 'app' prefix from the pathToMigrations, ensuring migrations are reliably located relative to the project root. This change improved deployment reliability and reduced risk across different environments. Egor’s work involved Go, migration tooling, and Git-based change management, with careful cross-environment validation. While no new features were introduced during this period, his targeted fix enhanced the stability and maintainability of the project’s migration framework.