Job searches are often difficult and advice from outsiders can be far off the mark. Some thoughts:
1. IT projects often need contract workers to work the length of a project. Would this be a possibility for her to restart her career?
2. Employers frequently advertise for <100% pensum positions, which may be directed at moms with other responsibilities. A search on "IT teilzeit" on jobscout24.ch shows a number of IT positions.
3. A search of the internet shows at least this website for job searching moms (but only one job listed in IT): http://www.jobsfuermama.ch/