Job descriptions usually aren’t very helpful. Here are the things you probably care about:

You’ll join us in developing the open source libraries, standards, and drivers our platform needs. We try to hire people who will do the work of their lives at Trinsic. That person is likely:

Within the first 30 days, you'll work with your onboarding buddy closely to implement your first PR on a key open source codebase. By 60 days, we expect you to be implementing features autonomously and by 90 days we expect you'll be irreplaceable because of your knowledge and domain expertise in a particular aspect of the codebase.

https://trinsic.typeform.com/to/aK1Mi1f3

Engineering Interview Process: what to expect