[job_card.job_description]Pay Rate: $53 per hour Location: Bellevue, WA Responsibilities: Execute and automate performance and functional tests using Spirent Landslide, Keysight IxLoad, and related tools. Validate protocols and call flows for 4G EPC, 5G Core, Diameter, SIP (VoLTE, VoNR), and HTTP2. Interpret and apply 3GPP specifications to ensure test cases and network behavior are standards-compliant. Perform API validation (REST/SOAP) and basic network troubleshooting (IP, VLANs, subnetting). Monitor systems using tools like Grafana and Nagios. Use scripting or programming to automate system and tool operations. Collaborate cross-functionally with multiple teams for test planning, execution, issue resolution, and project delivery. Requirements: Expertise with Landslide test tool and any other Spirent tools. Expertise with Keysight IxLoad/LoadCore test tool. Protocols: 4G EPC, 5GC, Diameter, http2, SIP flows for VONR and VoLTE, Non-3GPP access. 3GPP spec awareness for 4G, 5G call-flows. Experience/Knowledge of REST API/SOAP validation. Working knowledge of Basic IP protocols (IP, subnetting, VLAN, etc). Knowledge of Netscout, IP protocols (v4 and v6). Additional scope: Knowledge/System Admin tools such as Grafana, Nagios, etc. Programming for streamlining system management and test tool execution. Interpersonal skills & Project management: Comfortable reaching out to different teams to realize a project from start to finish, coordinate troubleshooting sessions. Preferred Skills: Strong hands-on experience with telecom test tools and traffic generators. In-depth knowledge of mobile network architecture (4G/5G). Comfortable working in a multi-team, collaborative environment with some project management or coordination responsibilities. Capable of both manual and automated test execution, with solid scripting skills for automation.