Intracellular phase separation is increasingly recognized as a key organizer of biochemical processes within cells. PopZ, an intrinsically disordered protein, exemplifies this by forming condensates at the poles of Caulobacter crescentus, thereby directing the cell cycle's regulatory signals. This presentation will explore the mechanisms behind PopZ's condensation and its role in cytosolic organization. I will illustrate how the interplay of attractive and repulsive forces, governed by its helical oligomerization domain and a disordered region, precisely tunes the material properties of PopZ condensates. These properties are crucial for maintaining the integrity of cell division, thereby connecting molecular dynamics to the fitness of the organism. Lastly, I will demonstrate the potential application of these principles in designing modular, adjustable synthetic condensates for human cells.