Software Engineer with expertise in Go, PostgreSQL, and networking

I am an old school Sysadmin that made the jump to full time software engineering work. Most of my career has been large scale systems or HPC type environments. As an engineer, I've worked mostly with Go and Python. I have also done a bit of Java, C, Perl and am learning Rust now. My expertise is in extracting performance at various levels, from the hardware to multi-threading and databases. My last decade has been spent on the anti-spam front of major ESPs. I am looking for something new and interesting that can utilize my deep knowledge of OS internals, networking, hardware, etc and advance my software engineering skills.