Senior Voice & Data Core Optimization Engineer | 5G/VoLTE

SIS Global; Saudi Arabia; On-site; SAR 120,000 - 180,000; Full time

Job summary

SIS Global in Saudi Arabia is seeking an experienced Voice & Data E2E Core Optimization Engineer to own optimization of CS/PS Core, IMS, VoLTE, EPC, and 5G Core. You will analyze performance, troubleshoot signaling, and drive improvements across roaming and data services.

You will collaborate with cross-functional teams, document findings, and ensure carrier-grade availability and security. The role requires hands-on Ericsson core project history and deep knowledge of SIP/Diameter signaling.

Qualifications

• Bachelor’s degree in telecommunications, electrical engineering, computer science, or related field.
• Minimum 5+ years of hands-on telecommunications core network engineering and optimization.
• Mandatory Ericsson core network experience with CS/PS Core, IMS, VoLTE, EPC, and 5GC.
• Proficiency in SIP, Diameter, SCTP, and GTP signaling protocols.

Responsibilities

• Own end-to-end core network optimization across CS/PS Core, IMS, VoLTE, EPC and 5G Core.
• Analyze KPIs, perform RCA, and troubleshoot complex signaling to improve call setup and data sessions.
• Interpret SIP, Diameter, SCTP, and GTP signaling flows in active networks.
• Collaborate with RF, transmission, and vendor teams during audits and deployments.
• Maintain thorough documentation and performance reports for stakeholders.

Skills

VoLTE optimization

KPI analysis

Root cause analysis

Cross-functional collaboration

Education

Bachelor’s degree in Telecommunications Engineering

Tools

Ericsson core network platforms

SIP signaling

Diameter signaling

5G Core (5GC)

Job description

SIS Global in Saudi Arabia is seeking an experienced Voice & Data E2E Core Optimization Engineer to own optimization of CS/PS Core, IMS, VoLTE, EPC, and 5G Core. You will analyze performance, troubleshoot signaling, and drive improvements across roaming and data services.

You will collaborate with cross-functional teams, document findings, and ensure carrier-grade availability and security. The role requires hands-on Ericsson core project history and deep knowledge of SIP/Diameter signaling.