Linux Network Engineer

Philadelphia, PA - USA

Monthly Salary: Not Disclosed

Posted on: 9 hours ago

Vacancies: 1 Vacancy

Job Summary

Hi
Greetings from Conch Technologies Inc

Position: Linux Network Engineer (GRE Traffic Inspection & Filtering)
Location: Philadelphia PA (5 days onsite per week)
Duration: 12 months contract

We are seeking an experienced Linux Network Engineer with strong scripting and packet analysis skills to support deep inspection of GRE tunnel traffic in a large scale production network. The engineer will develop automation to extract filter and analyze encapsulated packets and support operational troubleshooting for GRE related issues.

This role requires expertise in Linux networking GRE/ERSPAN packet capture filtering frameworks (nftables/iptables tc) and scripting (Python/Bash).

Must have:
6 years Linux Systems or Network Engineering experience
Experience working with GRE tunnels on Linux
Strong packet capture and analysis skills using tcpdump Wireshark/tshark
Proficient with Bash and Python scripting
Strong knowledge of iproute2 nftables/iptables and tc
Solid understanding of L2 L4 protocols DSCP/QoS and MTU mechanics

Job Description:
Develop Python/Bash scripts to inspect GRE tunnels and decapsulate/analyze encapsulated payloads
Build automated capture flows using tcpdump tshark and libpcap
Implement payload-aware filtering logic using nftables/iptables tc (flower/clsact) and eBPF/XDP
Troubleshoot GRE tunnel health encapsulation/decapsulation errors MTU/fragmentation issues and offload behavior
Create and maintain operational runbooks and documentation
Integrate capture data and metrics with observability platforms (Prometheus Grafana ELK)
Participate in on-call rotations as needed

Thanks & Regards

Nayak Teketi

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