SQL:
Works on all programming langs, faster than all ORM, PostgreSQL recommended.
C:
Works on tons of places, almost everything has C API, fast, future proof.
CSS:
But without a framework, probably you already know it, but is useful.
I can recommend to learn Nim lang, because it compiles to JavaScript, NodeJS, C, C++, but thats a very opinionated one, with those 3 of top you are on good track ;P
Experienced, Creative, ambitious and enterprising software engineer. I primarily focus on modern JavaScript, more specifically React, its ecosystem and Node.js.
SQL:
Works on all programming langs, faster than all ORM, PostgreSQL recommended.
C:
Works on tons of places, almost everything has C API, fast, future proof.
CSS:
But without a framework, probably you already know it, but is useful.
I can recommend to learn Nim lang, because it compiles to JavaScript, NodeJS, C, C++, but thats a very opinionated one, with those 3 of top you are on good track ;P
Thank you for such nice suggestions. I just started with PostgreSQL.
Will definitely look into others.
Thank you once again.