Cloudflare
Mid
Cloudflare Network Reliability Engineer — core data center network, automation, and AI-native tooling
Interview prep for Cloudflare's Network Reliability Engineer role on the Infrastructure team, responsible for the technical operation of Cloudflare's core data center network. Grounded in the JD's actual bar: 3 years of network/SRE experience, configuration management (Saltstack/Ansible/Chef), network OS depth (NX-OS/JUNOS/EOS/Cumulus/Sonic), Go/Python automation, and using LLMs to build agentic ops tooling.
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What this interview tests
- Data center network operations at scale
- Configuration management: Saltstack, Ansible, Chef
- Network operating systems: NX-OS, JUNOS, EOS, Cumulus, Sonic
- AI-native tooling: agentic automation, LLM-assisted troubleshooting
- Go/Python automation development
- Linux systems administration & networking (iproute2, traffic control)
Common question themes
Describe automating a manual network operations task end-to-end
Walk through debugging a real issue on a network OS you've operated (JUNOS/NX-OS/EOS/etc.)
Give a concrete example of using an LLM to build an agentic deployment or troubleshooting tool
How would you use SaltStack + Temporal (or similar) to automate configuration changes
How do you design for 'automate everything' and failure resistance at scale
Go or Python: describe a tool you wrote to support network operations
System design: bring an idea for improving network resilience from design to production
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