Grease two 9"3 loaf pans. (you can use what ever pans you have available, but make sure the Babka will have space to rise during the second rest and baking)
Place the dough on a clean and smooth surface, lightly floured. Divide dough into two even parts.
With a rolling pin, roll each dough piece into a rectangle 12" wide and twice as long as the pan you are using.
Spread cream cheese filling, leaving 1" empty space at the center of the dough and the edges.
Cut the Guava paste into thin slices and place them on top of the cream cheese filling. The Guava does not need to be crowded, some gaps between the stripes are best. Roll the filled dough starting from the farther edge towards you and fold it in half in a way the ends meet.
Twist the dough once or twice then place it in the pan, brush it with egg wash.
Allow the braided Babkas to rest and rise for about 2 hours.
Bake the Babkas at 350F (180C) for 45-50 minutes or until the temperature at the center of each loaf is 180F, and the top is dark golden and shiny.
Take the Babkas out of the oven and brush with the simple syrup.