Being a younger company, resourcing can be tight at times, so sometimes you need to be ready to roll up your sleeves when things get busy. This is rare, though.
The flipside of getting lots of responsibility is that you sometimes need to learn by doing. There isn't always a well-trodden path ahead of you, so being confident enough to make one yourself is essential. For some people, this is exciting, but for others it may feel like getting thrown in the deep end.