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.
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.
- Flexible working arrangements to support work–life balance
- A minimum of 90 days of Maternity and Paternity Leave, with the option to return to work within a year following the birth or adoption of a child (based on eligibility)
- Medical insurance plan and annual reimbursements for dental, eyeglasses, or lenses
- Sports, wellness, and culture reimbursements, including monthly support for activities, kindergarten, and after-school expenses
- Ticket Restaurant e-card and transportation allowance for daily convenience
- Generous referral bonus for referring qualified candidates
- 24+ paid vacation days and three annual bonuses (Performance, Christmas, and Easter)
- Well-being programs to support your mental and physical health
- Opportunities to engage with Nokia Employee Resource Groups (NERGs), as well as access to mentors, coaches, and Employee Growth Solutions
- A learning culture that promotes continuous personal and professional growth – for your role and beyond
Skills Required
- 10+ years of expertise in 5G/4G radio optimization
- Strong knowledge of Nokia SRAN BTS & NetAct
- Deep understanding of 5G & 4G RATs
- Excellent customer communication and reporting skills
- Experience delivering managed services projects
Nokia Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Nokia and has not been reviewed or approved by Nokia.
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Equity Value & Accessibility — Equity programs include a global employee share purchase plan with company matching and multi‑year share awards. These mechanisms broaden participation and tie rewards to long‑term outcomes.
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Healthcare Strength — Health coverage includes major medical plans with supplementary options such as vision, legal services, and care navigation. The range of offerings indicates comprehensive support for medical needs.
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Parental & Family Support — A global policy grants paid leave for new parents regardless of gender and provides structured return‑to‑work support. Company‑paid life insurance further strengthens family protection across regions.
Nokia Insights
What We Do
At Nokia, we create technology that helps the world act together. As a trusted partner for critical networks, we are committed to innovation and technology leadership across mobile, fixed and cloud networks. We create value with intellectual property and long-term research, led by the award-winning Nokia Bell Labs. Adhering to the highest standards of integrity and security, we help build the capabilities needed for a more productive, sustainable and inclusive world.
