After some technical interviews I just realized that I'm not a Senior Developer in Frontend nor Backend techonologies. In the beginning of my career I started as a Web Developer and after some years I became a Web Master, but both are more related to the early days of our industry and I have never worked in a software product for more than some months to learn about maintaining and scaling like a Senior or Technical Lead would learn.

So, if I want to became a Senior, I need to work in a company where I can maintain, scale and build software with the best practices and methodologies and this needs to be used for thousands of users.

Then, may can I become a Senior Developer?