This CPPCON focuses on improving your C++ coding skills. This also has lots of trading sponsors like JPMorgan, Bloomberg, and capital company
https://www.linkedin.com/pulse/what-ive-learned-after-coding-hft-low-latency-systems-ariel/
Compiler Explorer utility
Improve for HFT efficiency ready tips
NOTE I now post my TRADING ALERTS into my personal FACEBOOK ACCOUNT and TWITTER. Don't worry as I don't post stupid cat videos or what I eat!