Worked on the http4k/http4k repository to address a nuanced issue in backend HTTP handling, specifically targeting gzip streaming responses. Focused on correcting the Content-Length header behavior, the developer ensured that when the body length is unknown after compression, the header is properly removed to maintain protocol correctness. This involved implementing changes in Kotlin and enhancing unit test coverage to prevent regressions, thereby improving the robustness of the streaming pipeline. The work did not introduce new features but demonstrated careful attention to detail in backend development, HTTP protocol compliance, and test-driven practices, resulting in a more reliable gzip streaming implementation.