Packet Core Engineer

Job Summary

Role - Packet Core Engineer

Location - Plano, TX (Day 1 Onsite)

Job Summary:

As a Packet Core Engineer, you will play a key role in troubleshooting Core Network functions across 5GC and EPC domains. This role requires hands on expertise in deep protocol level troubleshooting, large scale Packet Core deployments, and cross functional coordination with Engineering, Operations, and Platform Teams. Experience in Messaging platform is an added advantage.

This role is ideal for someone with a unique blend of technical expertise, operational excellence, leadership skill set, and strong prioritization, facilitation, and communication skills.

In this role, you will:

  • Understand best practices for virtualized and cloud-native Core applications for mobile networks
  • Work on 5GC and EPC Packet Core nodes such as AMF/MME, UPF/SGW, SMF/PGW, PCF/PCRF, UDM/HSS, DNS, and related functions.
  • Support IMS/Messaging platforms (SIP, SMSC, MMSC, RCS, VoLTE/VoNR)
  • Analyze, troubleshoot, and resolve call flow issues across Control Plane and User Plane domains.
  • Perform deep debugging using trace tools, logs, KPIs, and protocol analyzers.
  • Own escalations, including end to end RCA, mitigation, and long term fixes.
  • Validate interworking between EPC, 5GC, IMS/Messaging, Transport, and RAN.
  • Define automation call flows for provisioning, upgrades, scaling, and fault recovery.
  • Document designs, test plans, and knowledge base material for new function introductions.
  • Skills, Experience and Requirements
As a successful 5G Core Engineer, you will have:
  • Degree in Electrical, Electronics, Computer Science, or Telecommunications Engineering (Master's or PHD will be favorable)
  • 8-12 years of telecom experience in 5G Core and 4G EPC domains (Experience in NOKIA and Oracle products preferred).
  • Hands-on expertise with Packet Core nodes (5GC + EPC) and protocols such GTPV2, GTP C/U, PFCP, NAS, Diameter, HTTP/2, SIP.
  • Strong troubleshooting skills in production environments.
  • Experience with virtualized/cloud infrastructures: AWS Cloud, Kubernetes, CNFs/VNFs.
  • Familiarity with orchestration, observability, and FCAPS systems.
  • Experience performing integration, debugging, testing, and optimization.
  • Strong communication, analytical thinking, and cross functional collaboration abilities.
  • Experience with Messaging/IMS (SIP, SMSC, MMSC, VoLTE/VoNR, RCS) is preferred.
  • Excellent interpersonal and leadership skills
  • Curious-minded person striving for continuous learning and innovation
  • Outstanding verbal and written communication skills


The pay range for this role is $105,000 - $110,000 per annum including any bonuses or variable pay. Tech Mahindra also offers benefits like medical, vision, dental, life, disability insurance and paid time off (including holidays, parental leave, and sick leave, as required by law). Ask our recruiters for more details on our Benefits package. The exact offer terms will depend on the skill level, educational qualifications, experience and location of the candidate.

Tech Mahindra is an Equal Employment Opportunity employer. We promote and support a diverse workforce at all levels of the company. All qualified applicants will receive consideration for employment without regard to race, religion, color, sex, age, national origin, or disability. All applicants will be evaluated solely on the basis of their ability, competence, and performance of the essential functions of their positions with or without reasonable accommodations. Reasonable accommodations also are available in the hiring process for applicants with disabilities. Candidates can request a reasonable accommodation by contacting the company ADA Coordinator at ADA_Accomodations@TechMahindra.com.
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