Worked on the fyne-io/fyne repository to deliver a targeted backend fix that improved font handling reliability in Go applications. Addressed a runtime error by updating the CachedFontFace logic to skip nil fallback fonts when certain build tags, such as -tags no_emoji, omit specific fonts during compilation. This approach enhanced the resilience of font rendering across different build configurations, reducing the risk of panics and supporting safer deployments. The work involved careful validation of font-loading paths and contributed to overall code stability. Leveraged Go and backend development skills to ensure robust handling of edge cases in font management for the project.