À propos
Role Overview We are seeking an experienced Linux Network Engineer (Infosys Contractor) 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 across the XWIFI Core Network.
This role requires expertise in Linux networking, GRE/ERSPAN, packet capture, filtering frameworks (nftables/iptables, tc), and scripting (Python/Bash). The contractor will collaborate closely with Comcast engineering teams while remaining an Infosys resource. Key Responsibilities • 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 Minimum Qualifications • 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 Preferred Qualifications • ERSPAN (Type II/III) decoding experience • GRE over IPv6 and GRE inside IPsec (xfrm) • High-rate packet capture frameworks such as PF_RING, DPDK, AF_PACKET • Experience with eBPF-based tracing tools such as bpftrace and XDP loaders • Experience writing CLI utilities in Python • Prior experience supporting ISP/carrier environments Success Metrics for the 1-2 Year Engagement
Diverse Lynx LLC is an Equal Employment Opportunity employer. All qualified applicants will receive due consideration for employment without any discrimination. All applicants will be evaluated solely on the basis of their ability, competence and their proven capability to perform the functions outlined in the corresponding role. We promote and support a diverse workforce across all levels in the company.
Compétences linguistiques
- English
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