at Cognizant in Warrenville, Illinois, United States
Job Description
Cognizant is looking for a test lead engineer that has 6-8 years experience SIP, IMS Core, VoLTE/CVoIP call flow process for testing and validation. Following skills/experience required:
- Strong knowledge in 5G/LTE/UMTS
- VoLTE/IMS Network Performance and Capacity Test and IMS Nodes Performance Benchmarking Activities.
- Extensive Hands on experience with VoLTE/IMS Call Processing and VoLTE/IMS Supplementary Services.
- Need to have hands on experience IMS Related Protocols Signaling Analyzing (VoLTE/IMS, VOIP Call Flows (SIP/SDP/H.248 etc.) using Iris Analyzer and RADCOM .
- Working experience on IMS interworking entities (BGCF, MGCF, MRFC, MRFP, AGW, IBCF, TrGW) and interfaces.
- VOIP / IMS call flows (expertise in SIP based call flows) – Voice and Supplementary Services.
- Experience with LTE core system interfaces and protocols such as S1-MME, S1-U, S6a, S11, S5/S8, Rx, NAS, S1-AP, RRC, GTPv2c, GTP-U, SGs-AP, Gn, Gx, Ga, Sy is desired
- In-depth understanding of Telecom Protocols and technologies like GTPV2,SIP, RTP, IPv4 and IPv6, DIAMETER, DNS, H.248, IPSec, TCP-IP, LDAP, etc.
- Design & Troubleshooting experience in VoLTE E2E Call Flows and RCA Debugging Skills and IP Network design, planning and optimization
- Scripting experience on any language like Python/Unix/Selenium and hands on experience on Android adb command for automation and taking device logs
- Tool Experience on Wireshark,QXDM,RADCOM,IXIA,EXPO,LANDSLIDE etc
About Cognizant’s IoT Practice:
Intelligent, IoT-enabled products will soon result in the proliferation of data and disrupt virtually all industries. To be successful, both large and small companies must leverage IoT capabilities by designing modern products that fundamentally connect people with processes. Within Cognizant IOT, we engineer industry-aligned, IoT-enabled products that merge industry needs with human drivers. Our intelligent products will revolutionize experiences and result in exciting, transformative outcomes. Without human-centered thinking, connected products are just standalone things-but with it, our modern connected products facilitate a unified way of life enjoyed by all.
**_*Please note, this role is not able to offer visa transfer or sponsorship now or in the future*_**
+ Applications will be accepted until June 4th , 2026
+ LI#- #LI-SC6
Compensation & Benefits
$84,000 – $117,000 per year
+ Bonus + Comprehensive Benefits
Additional Information
+ Onsite role
+ ?? Visa sponsorship is not available now or in the future. Candidates requiring sponsorship will not be considered.
Benefits : Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
- Medical/Dental/Vision/Life Insurance
- Paid holidays plus Paid Time Off
- 401(k) plan and contributions
- Long-term/Short-term Disability
- Paid Parental Leave
- Employee Stock Purchase Plan
Cognizant is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.
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