So, when it comes to the senior full stack engineer, this is what we call career level because it's where you could stay for the rest of your career. Now, the thing that changed with the senior level is that back in the days used to be very attached to your text stack. So you'd be a senior full stack engineer that knows React and TypeScript. Nowadays, it's easier for you to extrapolate that to other programming languages or even other platforms.
So, when we talk about full stack, it's not anymore about your typical stack, somebody that can really think about the high level the fundamentals of software engineering and they can apply that to even a different platform. Like I don't know, you could do embedding engineering, you could build a mobile app. So, this is the most stable level, it's also the hardest to get to. Because you need to be able to move very fast from sequel optimization to CSS patterns.
So your fundamentals have to be really be really strong and you need to have this ability to transverse your knowledge from one point to the other.