Yes, sometimes the data structure you need is either:

- unavailable (in a permissive license in) the platform you're currently using.

- available with an unsatisfying implementation.

If you're lucky, your employer will allow you to contribute to open source during your working hours so other developers won't need to re-implement it.

Now, if the question is about whether I needed to come up with a totally novel data structure at the office, the answer is no in my case.