System/Network Test Engineer

Job Description :Job Summary :

We build Linux-based routers with advanced forwarding (unicast/multicast/broadcast), secure VPN (WireGuard/tinc), and core services (DHCP, DNS client, NTP). We operate an inhouse Windows-based automated test platform where test suites/cases are defined in XML and executed via C/C++ MinGW command-line tools. You will own test planning from change requests, develop/extend automation, execute test suites, and debug issues across networking, services, and diagnostics. Strong Linux/networking fundamentals, comfort with Windows scripting/CLI, and hands-on packet analysis are essential.

Key Responsibilities :

You will validate and continuously improve a Linux-based router platform that includes :

• Forwarding : unicast, multicast, broadcast, with client-specific customizations

• Secure VPN : WireGuard and tinc

• Services : DHCP server management, DNS client handling, NTP

• Packet capture & analysis, system diagnostics (system watch snapshots)

• UI in JavaScript, backend in C/C++, with Linux tools like igmpproxy, iptables/netfilter, tcpbridge, dtls_proxy

Required Skills & Qualifications :

• 7 - 11 years of experience in Network Testing

Must-Have Skills :

• Solid Linux networking fundamentals : L2/L3, routing/forwarding, VLANs, NAT/firewall basics.

• Hands-on with iptables/netfilter (nftables a plus), IGMP/igmpproxy, multicast flows.

• VPN experience : WireGuard and/or tinc (peering, keys, routing, MTU).

• Automation with XML-defined tests : comfortable reading/writing XML; XPath; reusable test steps.

• Languages : Competent in C/C++ for tool upkeep; scripting (Bash and/or Python) for helpers.

• Tools : Git, CI (e.g., Jenkins/Azure DevOps), issue trackers (Jira), documentation habits.

Nice to Have :

• Packet capture & analysis : tcpdump, Wireshark, pcap filters, correlating traces with logs.

• Services : DHCP server behavior, DNS client resolvers, NTP concepts (stratum, offset, jitter).

• Windows CLI & scripting : PowerShell and/or Batch; operating MinGW-built command-line tools.

• nftables, ebtables/bridge utilities, tc/qdiscs, interface bonding/bridging.

• Scapy, iperf3, Npcap/WinPcap; serial console workflows.

• Experience with custom/lab test frameworks, hardware-in-the-loop, or ladder/flow-based automation tools.

• Familiarity with JavaScript UIs for validating front-end to backend integration.

• Exposure to security practices for VPN key mgmt and config hygiene.

Education :

• UG : B.Tech / B.E. in Any Specialization

• PG : M.Tech in Any Specialization