After reception of letter they contacted me within two weeks. Then something changed and they contacted me to tell me it would take some time, so they'd come back in a month or so. Indeed after quite a while they came back, asked if I was still interested, and we scheduled an interview. Interview went well, with two people from the department where I would work. After that, a phone call within two weeks, then another interview with HR and then a phone call telling me I was selected and I would receive an offer.