Karim Haddad

Proxy Infrastructure & Network Engineering at ProxyTool

Karim spends his time where proxies meet the real world: comparing residential, ISP, datacenter and mobile networks, testing what providers actually deliver, and getting teams with hundreds of devices onto the right exits without leaking anything on the way. He writes the guides that answer the questions support really receives — which proxy type fits which job, why a connection is slow or blocked, how to build chains and per-app rules, and how to verify that a tunnel does what it claims. His articles cover the same ground as the rest of the team: proxy protocols, routing, leak prevention and fleet management across all four ProxyTool clients.

• Tests proxy networks and providers
• Proxy fleets for distributed teams
• Windows, macOS, Linux & Android clients