IMS Core Expert

Nokia Corporation
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📍 RomaniaFull time

About this role

We are seeking a highly skilled IMS Core Network Expert to join our dynamic team at GSD MS Managed Performance Services. This role is critical in ensuring the performance, optimization, and reliability of Nokia CS/IMS Core network infrastructure. The ideal candidate will bring deep technical expertise in IMS protocols, call flows, and 3GPP standards, along with hands-on experience in performance analysis, troubleshooting, and network optimization. You will collaborate with cross-functional teams to drive innovative solutions, resolve customer issues, and enhance network KPIs to meet industry benchmarks.
 

  • Nokia IMS Core Network Optimization: KPI calculation, Capacity forecasting, and network audits. Identify performance bottlenecks and resolve incidents.

  • IMS Call Flow & Protocol Analysis: Troubleshoot Registration, SIP call setup/teardown, RTP/RTCP, EPSFB, and Interworking. Analyze SIP error codes and cause codes.

  • Network Operations & Customer Support: Interface with customers, perform end-to-end tracing and call flow analysis, and provide technical resolutions.

  • Network Architecture & Optimization: Design, deploy, and maintain CS/IMS Core elements. Collaborate on network enhancements and capacity planning.

  • Automation & Tooling: Utilize Power BI, NetAct/OSS, and Cloud platforms for monitoring. 

  • Documentation & Reporting: Prepare reports, lead CS/IMS Core performance meetings, and define database/network parameters.

  • Bachelor of Engineering in Electronics/Electrical/Communication/Computer Science
  • Minimum 12+ years of domain experience
  • Strong knowledge of Nokia IMS Core and CS Core KPIs.
  • Solid working experience in latest Nokia Products – CNCS IMS, SDM/SDL, UDM & AUSF
  • Vast experience on optimization & troubleshooting of Nokia IMS & CS Core nodes
  • Sound Knowledge on IMS parameters & timers, policies and their impact on network performance
  • Expertise in IMS protocols (SIP, SDP, Diameter, RTP/RTCP) and 3GPP signalling.
  • Hands-on experience with Wireshark tracing, any Network Probing tools (RADCOM, NETSCOUT, Polystar, etc.) - Perform e2e tracing and call flow analysis, collect logs and analyze and come with actionable insights.
  •  Experience in End-to-End Roaming KPI monitoring.
  • Deep understanding of HLD, LLD, MOP Validation and IMS Core network planning.
  • Strong analytical & troubleshooting skills
  • Ability to work in shifts to support global customer projects.
  • Proficient in English, MS Office & PowerBI
  • Skilled in any of Kubernetes, Docker, AWS services, Scripting, and/or Python programming is added advantage.
     
Advancing connectivity to secure a brighter world.

Nokia is a global leader in connectivity for the AI era. With expertise across fixed, mobile and transport networks, powered by the innovation of Nokia Bell Labs, we’re advancing connectivity to secure a brighter world. 



Our recruitment process

We act inclusively and respect the uniqueness of people. Our employment decisions are made regardless of race, color, national or ethnic origin, religion, gender, sexual orientation, gender identity or expression, age, marital status, disability, protected veteran status or other characteristics protected by law. We are committed to a culture of inclusion built upon our core value of respect.

If you’re interested in this role but don’t meet every listed requirement, we still encourage you to apply. Unique backgrounds, perspectives, and experiences enrich our teams, and you may be just the right candidate for this or another opportunity.

The length of the recruitment process may vary depending on the specific role's requirements. We strive to ensure a smooth and inclusive experience for all candidates. Discover more about the recruitment process at Nokia. 

Frequently Asked Questions

Is the salary disclosed for the IMS Core Expert position at Nokia Corporation?
The salary for this IMS Core Expert role at Nokia Corporation is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the IMS Core Expert position at Nokia Corporation located?
This IMS Core Expert role at Nokia Corporation is based in Romania. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the IMS Core Expert role at Nokia Corporation full-time or part-time?
This is listed as a Full time position. It is posted as a IMS Core Expert role at Nokia Corporation.
How do I apply for the IMS Core Expert position at Nokia Corporation?
Click the "Apply Now" button on this page. You will be redirected to Nokia Corporation's official application portal hosted on oraclecloud where you can submit your application directly.
When was the IMS Core Expert job at Nokia Corporation posted?
This IMS Core Expert position at Nokia Corporation was posted on Aug 4, 2026. Apply as soon as possible — early applications are often reviewed first.
IMS Core Expert
Nokia Corporation
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