In February 2025, Miros Markarian focused on enhancing the correctness and stability of ORM query execution within the sequelize/sequelize repository. He addressed a nuanced bug by refining how index hints are scoped in Sequelize queries, ensuring that hints apply only to the top-level table and do not propagate to associated tables. This change, implemented in TypeScript and JavaScript, reduced the risk of suboptimal query plans and performance anomalies in complex join scenarios. By adding targeted regression tests, Miros improved the reliability and predictability of ORM-generated SQL, demonstrating depth in backend development, database query optimization, and robust testing practices.