Traefik[1] is written in Golang, which is technically a (depending on your viewpoint) memory-safe language. It has a pretty decent adoption rate, has a reasonable story for being built on battle-tested libraries, and has a pretty good reputation.
Haskell has yesod[2] but I don't think there's a variant of that dedicated to nginx- or haproxy-esque reverse proxy duties.
Haskell has yesod[2] but I don't think there's a variant of that dedicated to nginx- or haproxy-esque reverse proxy duties.
[1] https://github.com/containous/traefik
[2] https://www.yesodweb.com/