Developed the Elo Zelo file writer utility for the Solvro/backend-wakacyjne-wyzwanie-2025-zadania repository, focusing on backend development and basic scripting using TypeScript. The utility generates a text file, elo-żelo.txt, writing the string 'Elo żelo' repeatedly based on the current minute, demonstrating practical file I/O operations. Initially, the implementation wrote to the file during each loop iteration, but this was refined to accumulate the output and perform a single write, preventing partial overwrites and improving efficiency. The work emphasized clear commit practices and reproducibility, delivering a lightweight automation tool that enhances traceability for small-scale backend scripting tasks.