Nope. If you're a senior developer, you're a senior developer. You've developed the thinking skills you need for that level. Places that need very deep experience in a very specific technology are quite rare.
One of the skills you have as a senior dev is that you can come quickly up to speed on a new stack in whatever your field is. You understand the underlying problems, learning the new incantation to make things work is comparatively trivial.
Note: If you entirely switch fields this does not necessarily apply.
One of the skills you have as a senior dev is that you can come quickly up to speed on a new stack in whatever your field is. You understand the underlying problems, learning the new incantation to make things work is comparatively trivial.
Note: If you entirely switch fields this does not necessarily apply.