If you have basic understanding of using the terminal, you can use Caddy (I’m the developer) for free to serve your site, which includes automatic HTTPS (with auto-renewal) by default: https://caddyserver.com
If you still want to hire someone, you could look for a systems administrator (“sysadmin”) or “devops” professional, which is more specifically about managing the machines and systems that keep sites online, more than developing the site, specifically. (But some can do both.)