DC boosting converter design
Consider the high speed current loop in the boost converter:

GND - input cap - inductor - and then:

FET ON: FET - GND
FET OFF: diode - output cap - GND

You want the last two GNDs to be tied together at the same point. This means sticking the GND pin of the output cap next to the GND pin of your IC. This will avoid transporting high frequency, high di/dt currents through the ground plane.

Current flowing through the inductor and input cap is smoothed, so it is less of a problem.

Do the same for the other converter. It is only a simple tweak to your layout. Always think about loops!

Now, since boost converters generate lots of noise on the output, due to the discontinuous output current, you might want to add a simple LC filter, with a ferrite bead and caps. These are cheap and work wonders on HF noise. Murata provides spice models for their ferrite beads, so you can check transfer function in simulation.