Poor planning can lead to unneeded overtime (but at least it's paid).
Artificial stress is introduced sometimes (criticality is exaggerated)
Some business processes are not clear or even defined (which leaves you space for impacting them).
Employees are in charge of managing their time and workload mostly by them selves, which gives autonomy but can leave some people filling overwhelmed.
Every 10 weeks or so, you're on 24/7 passive duty, which is compensated but not yet optional.
Legacy code and infrastructure.
No work from home option.
Standard, plain 20 vacation days package, no possibility to exchange overtime for free days yet.
Getting vacation days when you want them can be tricky sometimes.
Limited parking spots near the building.