 For the first time, ultra-short electron bunches with low timing jitter relative to the photocathode, PC, laser have been experimentally proven at the Spark Underscore Lab test facility using a two-stage hybrid compression scheme that includes RF-based compression and non-isochronous dogleg line, resulting in a final bunch duration of less than 90 fs RMS and timing jitter lower than 20 fs RMS, which have been validated through numerical simulations. This article was authored by R. Pompili, M. P. Ananiya, M. Beloveglia, and others.