Core Network SME

Welvaart; Riyadh; On-site; SAR 240,000 - 360,000; Full time

Job summary

Welvaart is seeking an experienced Core Network engineer to ensure stability, performance, and reliability of 4G/5G networks. You will troubleshoot EPC/5GC components, resolve high-priority incidents, and collaborate with Huawei and Nokia for deep issue resolution.

The role requires 8+ years in Core Network, strong protocol knowledge (GTP/ Diameter/ SIP/ S1AP/ NGAP), and a track record in NOC environments. Rotation between Riyadh and remote work is part of the schedule.

Qualifications

• 8+ years of experience in Core Network (4G/5G) operations and troubleshooting.
• Hands-on experience with EPC/5GC components (MME, SGW, PGW, AMF, SMF, UPF, IMS).
• Experience in multi-vendor environments (Huawei, Nokia preferred).
• Strong understanding of telecom protocols (GTP, Diameter, SIP, S1AP/NGAP).
• Experience handling critical incidents and working in NOC environments.
• Familiarity with KPI analysis and performance monitoring.

Responsibilities

• Perform advanced troubleshooting across EPC and 5GC components.
• Investigate and resolve high-priority incidents impacting core services.
• Analyze signaling flows to identify root causes of degradation.
• Support incident triage and escalation as L2/L3 expert within NOC.
• Collaborate with vendors for deep technical resolution and patch validation.
• Review and validate core network architecture and integration with RAN and IT.
• Identify performance bottlenecks and optimization opportunities.
• Contribute to RCA documentation and corrective actions.
• Ensure adherence to operational procedures in core network management.
• Support change validation and risk assessment for planned activities.
• Provide technical guidance to L1/L2 engineers and knowledge transfer.
• Monitor KPIs and recommend improvements aligned with service targets.

Skills

Core Network

EPC/5GC

4G/5G

Troubleshooting

L2/L3 support

Scripting (Python)

Vendor coordination

GTP/Diameter/SIP

S1AP/NGAP

Multi-vendor (Huawei/Nokia)

Education

Bachelor's degree in Telecommunications, Computer Science, Electronics

Tools

Performance monitoring tools

Job description

About Welvaart

At Welvaart, we create technology solutions that put people at the center.
Our close leadership style and flexible culture of growth empower our teams and elevate the quality of our delivery. We combine rigor, innovation, and empathy to drive projects that transform businesses and build lasting relationships of trust.

We complement this vision with a performance‑driven Digital Marketing offering, helping companies strengthen their visibility, enhance their online presence, and accelerate growth through smart, measurable strategies.

Project

Ensure stability, performance, and reliability of the 4G/5G Core network by resolving complex incidents, supporting architecture decisions, and coordinating with vendors. Drive rapid issue resolution, identify risks and optimization opportunities, and enhance operational maturity while enabling knowledge transfer and aligning Core operations with NOC performance and service quality objectives.

Role

• Perform advanced troubleshooting across EPC and 5GC components (MME, SGW, PGW, AMF, SMF, UPF, IMS).
• Investigate and resolve high-priority (P1/P2) incidents impacting core network services and subscriber connectivity.
• Analyze signaling flows and protocols (S1AP, NGAP, GTP, Diameter, SIP) to identify root causes of service degradation.
• Support incident triage and escalation handling, acting as L2/L3 expert within the NOC.
• Collaborate with vendors (Huawei, Nokia) for deep technical issue resolution and patch/workaround validation.
• Review and validate core network architecture, configurations, and integration points with RAN, transport, and IT domains.
• Identify performance bottlenecks, capacity constraints, and optimization opportunities.
• Contribute to Root Cause Analysis (RCA) documentation and corrective/preventive action definition.
• Ensure adherence to operational procedures and best practices in core network management.
• Support change validation and risk assessment for planned core network activities.
• Provide technical guidance to L1/L2 engineers and support knowledge transfer initiatives.
• Monitor KPIs and recommend improvements aligned with service quality targets

We are looking for

• Bachelor's degree in Telecommunications, Computer Science, Electronics, or related field.
• 8+ years of experience in Core Network (4G/5G) operations and troubleshooting.
• Strong hands-on experience with EPC/5GC components (MME, SGW, PGW, AMF, SMF, UPF, IMS).
• Proven expertise in multi-vendor environments (Huawei, Nokia preferred).
• Solid understanding of telecom protocols (GTP, Diameter, SIP, S1AP/NGAP).
• Strong analytical, debugging, and problem-solving skills in live network environments.
• Experience handling critical incidents and working in NOC environments.
• Familiarity with performance monitoring tools and KPI analysis.
• Good scripting or automation exposure (Python, Shell) is a plus.
• Strong communication and stakeholder management skills.
• Project Location: Riyadh, Saudi Arabia.
  The role follows a rotational work arrangement. Employees are typically assigned to Riyadh for an initial period of three months, followed by 15 days in their home country. This is then followed by a further three-month assignment in Riyadh. The remainder of the year is worked remotely. This rotation pattern is repeated annually.

What you can discover with us?

• Be part of a tech start-up
• Different scopes of project in different sectors
• Structure of fairness and equity salary (Consultant Profile)
• Training & Certification
• Career Path management
• More than 30 Partnerships

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