This job ad has been posted over 40 days ago! (*)
Citrix’s goal is to enable everyone to work from anywhere, any time, and on any device. Citrix Hypervisor (formerly XenServer) is a virtualization product built on top of the open-source Xen hypervisor and XAPI toolstack.
You’ll have the opportunity to actively contribute to various open-source projects that are part of the product, mainly the XAPI project: https://github.com/xapi-project
If you enjoy working in functional languages, in particular OCaml check out the job posting.
Note: due to COVID-19 the interview and work will be remote, with a gradual return to office, see https://jobs.citrix.com/covid