Strength in developing well-designed, robust applications and writing clean code.
Over a decade of experience developing performance-critical systems in multiple financial institutions, a significant part of which was on low-latency electronic trading systems in equities markets.
My current focus is on utilising this knowledge on large scale data processing pipeline.
I prefer Java (no, GC is not a must) and only dig into C/C++ when necessary. See Martin Thompson's talk which explains this approach well: https://youtu.be/Pz-4co8IaI8