Senior Network Test Engineer

• Perform end-to-end testing for LTE, LTE-A, 5G NSA/SA, and WiFi 5/6/6E networks
• Validate attach/registration, carrier aggregation, EN-DC, VoLTE/VoWiFi, VoNR, handovers, fallback, and mobility scenarios
• Execute throughput, latency, jitter, and packet-loss testing using standardized benchmarking methods
• Analyze RAN KPIs and troubleshoot coverage, mobility, capacity, and interference issues
• Test residential and enterprise routers, gateways, modems, mesh WiFi systems, and CPE devices
• Validate performance, reliability, and stability across fiber, DSL, wireless broadband, and Ethernet backhaul
• Execute LAN/WAN configuration workflows, device onboarding, and end-to-end connectivity validation
• Configure and validate IPv4/IPv6, subnetting, VLANs, DHCP, DNS, NAT, port forwarding, and firewall rules
• Test VPN technologies including IPsec, SSL VPNs, WireGuard, and OpenVPN
• Troubleshoot Layer 2–Layer 7 connectivity using tools such as Wireshark, tcpdump, traceroute, and iPerf
• Build and maintain test environments combining 5G/LTE devices, broadband routers, switches, servers, VPN endpoints, and test tools
• Ensure test repeatability through documentation, configuration management, and version control
• Integrate new firmware, OS builds, APNs, SIM profiles, and network parameters into test cycles
• Use tools such as TEMS, X-Cal, Actix, QXDM/QCAT, Wireshark, tcpdump, iPerf, and spectrum analyzers
• Perform deep log analysis (RRC, NAS, SIP, RTP/RTCP, system logs) to identify root causes across wireless and IP layers
• Produce clear test plans, defect reports, KPI dashboards, and root-cause analyses
• Collaborate closely with RAN teams, broadband engineers, device OEMs, and network operators

• Professional experience in LTE/5G and/or WiFi testing, broadband/CPE validation, or IP networking
• Strong understanding of IP networking fundamentals (routing, VLANs, NAT, firewalls, DHCP, DNS)
• Hands-on experience with network test and diagnostic tools (Wireshark, iPerf, tcpdump, TEMS, X-Cal, Actix, QXDM)
• Ability to design, configure, and troubleshoot complex testbeds across wireless and IP domains
• Strong analytical, troubleshooting, and documentation skills
• Fluent or professional working proficiency in English (French a strong plus)
• Must have the legal right to work in France (EU/EEA citizen or valid French work authorization)

French language skills