I am pentester and a CTF player.
Very familiar with JavaScript and Python, but also have some reasonable knowledge with Java, C, C++, and PHP. Developed a bunch of semi-abandoned projects here.
Started to play CTF since late 2020, mostly focused on Web, Crypto and Jails challenges, but also know a bit about Pwn and Reverse stuffs. I play with teams like ${cystick}, XxTSJxX, Balsn, check out my CTFTime page for more details.
I also have a blog here, it is mostly CTF writeups now and most of them are written in Chinese.