Pros
People are very open for support, sharing knowledge - You’re allowed to spend 20% of your time (usually Fridays) on projects not strictly related to your product work. If you’re interested in different technologies, there will be always someone who can help you. Very good work-life balance - for engineers working over-hours or on weekends almost never happens and would be considered as a negative sign. There are many occasions to celebrate wins together, every few months there will be a Friday party hosted by employees and more Great company culture - you can see that many people are really into music - playing instruments, DJing, producing, (…).
Cons
If you expect the company that moves and iterates fast, SoundCloud might not be the best place. The amount of tech-debt is quite significant what slows down the engineering a lot. But because of this could be a great place for training your architectural skills, navigating toward goals with limited resources. SoundCloud might improve on testing - since there is no QA team onsite, engineers need to rely on automated tests or external support. This not always can be enough and quite often simple mistakes make it to the production.