https://jobs.co.uk/job/5g-network-performance-engineer-randstad-technologies-recruitment--29b5bff2-ebe2-41db-8fad-2743b8ac0819 RSS feed for 5G Network performance engineer at Randstad Technologies Recruitment. en-gb Thu, 01 Oct 2026 19:47:10 GMT https://jobs.co.uk/job/5g-network-performance-engineer-randstad-technologies-recruitment--29b5bff2-ebe2-41db-8fad-2743b8ac0819 https://jobs.co.uk/job/5g-network-performance-engineer-randstad-technologies-recruitment--29b5bff2-ebe2-41db-8fad-2743b8ac0819 Thu, 01 Oct 2026 11:53:23 GMT Location: London | Salary: 449.00-449.00 Daily | Type: Contract | Advert Job Title: 4G/5G RAN Performance and Optimisation Expert (ESN) Duration: 06 months with possibility of extensionLocation: London-HybridWhy This Role Matters Join us and play a critical role in maintaining our position as a leading UK mobile network and driving our vision to be a global top-ten network. In this role, you will directly impact our current and future network efficiency, shaping the Mobile RAN strategy and ensuring a flawless subscriber experience-particularly for the highly critical Emergency Services Network (ESN).What You''ll Be DoingPerformance Leadership: Drive 4G/5G ESN performance management, define SLAs/KPIs, and build action plans for continuous performance uplift.RAN Optimisation: Lead feature and parameter optimisation trials across Nokia and Ericsson RAN, assessing network impacts and quantifying gains.Deep-Dive Analysis: Conduct root cause analysis of performance degradation using drive test logs, Wireshark, OSS data, and CN protocol analysis (OSI L1-L7).Technical Troubleshooting: Investigate and resolve systematic issues in 5G SA/NSA interworking, ESN PTT (Push to Talk) over SRTP, and overall End-to-End network performance.Cross-Functional Collabora... Contract