Network Engineering Specialist in London

We are Hiring: 4G ESN / Mobile RAN Performance SME

Are you an expert in 4G RAN performance optimization, UE log analysis, and E2E troubleshooting ? We are looking for a high-impact Radio Network Performance SME to shape Mobile RAN strategy and lead technical performance initiatives for critical, high-availability networks.

Key Responsibilities:

• End-to-End Analysis: Conduct deep-dive analysis on UE logs, Wireshark traces, and drive test data across OSI Layers 1–7.
• KPI Optimization: Perform root-cause analysis on underperforming network KPIs, systematically diagnosing and resolving defects in ESN PTT over SRTP .
• Protocol & Network Tracing: Analyze LTE, SIP signaling, PTT (Push-to-Talk), and SRTP/DTLS protocols across eNodeB, Core Network, and third-party OTT traces.
• Cross-Team Collaboration: Work directly with RAN Design, Engineering, and third-party vendors (Nokia/Ericsson) to deliver fixes, continuous network improvements, and strategic RAN design requirements.

What We Are Looking For:

• Technical Mastery: Deep knowledge of 4G / LTE, Public Safety over LTE/5G+, Nokia RAN, and protocols (SIP, SRTP, DTLS).
• Logging & Analysis Tools: Expertise in UE log analysis tools (Accuver), drive test software (TEMS / Nemo), Wireshark, and post-processing tools (Actix).
• Data Storytelling: Strong ability to translate complex technical concepts into clear business insights for senior stakeholders and non-technical teams.
• Telecom Experience: Extensive background as a Performance SME on business-critical, high-availability mobile networks.

Quick Snapshot:

• Role: Mobile RAN Performance SME (4G ESN / A2G)
• Domain: 4G RAN, Public Safety LTE, PTT & SIP Signaling, UE Log Analysis

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