Job ID: SRJ_7431Location: Redmond, WAEmployment Type: 1099, C2C, W-2Company: SRI Tech SolutionsJob Title: 4G/5G Services TesterLocation: Redmond , WA (Onsite)Experience (Years)10 (Max)SkillsVoLTE TestingResponsibilities:Execute manual and automated test cases; troubleshoot issues using logs and traces.Coordinate with Network Function owners and Lab Support teams (onshore/offshore) to resolve issues.Perform regression and new service testing in lab and production environments.Validate new services or regressed releases and document the validation process.Modify and create new test cases using automation infrastructure.Collaborate with Automation team to improve reliability and issue identification.Develop automation solutions to enhance lab stability.Write detailed requirements for new test case automation, including steps and validation criteria.Procure necessary devices/builds for service testing.Skills Required:Expertise in 5G SA/NSA and LTE call flows (E2E: Device – RAN – Core Network).In-depth knowledge of service call flows: Voice, Messaging, UCE, UT, USSI, VoLTE, VoWiFi, IR92, IR94, AS262 HO, WPS, RTT, N11, International Wi-Fi, S8HR.Strong understanding of VOIP protocols: SIP, Megaco/H.248, MGCP, DNS, LNP, TCAP, SDP, RTP, DIAMETER; IMS (Audio/Video signaling, IM, RCS, Presence, Subscription), VoNR, VoLTE/LTE EPC.Proficiency in 5G and LTE EPC core protocols: GTPV2C, GTPV1C, GTPV1U, S1AP.Experience with NATing and Proxy functions in packet core environments, including routing/firewall implications.Excellent troubleshooting and communication skills (written and verbal).Ability to clearly articulate complex issues and solutions.Experience with automated testing using simulation and real UE automation.Team-oriented mindset with a focus on delivering quality projects on time.SRI Tech Solutions is an equal opportunity employer and does not discriminate on the basis of race, color, gender, religion, age, sexual orientation, national origin or citizenship status or ethnic origin, disability, marital status, veteran status, or any other occupationally irrelevant criteria.
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