Worked on rendering fidelity improvements for the Screenly/Playground repository, focusing on delivering a device pixel ratio (DPR)-aware rendering feature. The solution corrected render URL construction and shifted dimension calculations to use screen size rather than window size, addressing inconsistencies across devices. By introducing a scale parameter, the implementation enabled higher visual fidelity on high-DPI displays and reduced dimension-related artifacts. All changes were consolidated in a targeted commit, enhancing both the reliability and scalability of the rendering logic. The work was carried out using TypeScript and front end development skills, with a strong emphasis on testing to ensure robust results.