PJSE's main expertise is in the field of software development. This ranges from analysis/design to implementation, maintenance/extension/repair and consultancy.
PJSE has (among other things) experience with:
The main fields of expertise for PJSE are medical software (radiotherapy) and software for and surrounding POSs (POS = Point Of Sale).
A plain enumeration of some of the methods, techniques, languages and tools that have been used before: