Some of the functions in raster package support parallel computing.
This example includes a parallel job using predict() funcion from raster package. The precence/absence of R logo is predicted in an image. This type of model is often used to predict species distributions. See the dismo package for more of that.
The example is from https://www.rdocumentation.org/packages/raster/versions/2.5-8/topics/predict and it's simplified and adapted to be run thorugh batch job system in Puhti.
r_run.sh shows how to submit parallel R jobs to Puhti SLURM system.
For further details see comments in script. For general instructions on how to use R in Puhti see https://docs.csc.fi/apps/r-env-singularity/