The biggest challenge in working here is building with nascent technology. The tech has not matured to have features that we can leverage, the documentation gets out of date, examples you may find are stale and so you have to dive deep into the source to figure it out. So if you are not into problem solving and diving deep in a tech stack then this isn't the place for you. If you really love to be on the bleeding edge of emerging tech then come apply!
Also, as an early stage company, we are small and so you have to establish process and adjust as needed. So don't apply if you are looking for a place with a lot of structure and a ridged/established way of doing things. Be prepared to take on a lot of freedom and a lot of responsibility immediately.