Software Engineer interested in systems and backend

For the last 5+ years, I've designed, built, and maintained the software (application and embedded system) for various test and measurement avionics products. At home, I've worked on side projects such as making my own HTTP media server/web interface and porting Perl to the Cosmopolitan Libc (featured on HN: https://news.ycombinator.com/item?id=33966755). I am interested in various systems and backend software engineering from web to embedded.