Ask HN: Any Good code review or security testing services?

Looking for any recommendations for a service (or consultant recommendation) that allows submitting code for review or security (hacker/vulnerability) testing?

The code could be a basic function, or part of a more complete product. Ideally more at the snippet/small library level to reduce review complexity. Less of a bug bounty program, more of a direct review service.

I have a current need related to js/node.js, rust, and various html/http best practices (content security policies, etc).