During September 2025, Mironov contributed to the rainbow-me/rainbow repository by refining modal flows to improve UI consistency and layout reliability. He focused on front-end development using React, JavaScript, and Styled Components, delivering a feature that enhanced the modal header by aligning the 'done' button, updating typography, and preventing text truncation. Additionally, he addressed a layout bug by adding missing padding beneath the wallet address in the receive modal, which improved visual spacing and usability. Mironov’s work emphasized maintainability and cross-team collaboration, using clear commit messages and co-authored pull requests to support faster QA cycles and predictable user experiences.