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# Network Engineer

- **Company:** Rubicon Consulting
- **Location:** London, UK
- **Contract:** Temporary contract
- **Skills:** Testing (Software), 4G (Telecommunication), LTE (Telecommunication), Datagram Transport Layer Security, Network Planning and Design, Open Systems Interconnection (OSI), Wireshark, Wireless Networks, Feature Selection
- **Published:** July 29, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/x/41727132/

## About the Role

4G/5G & Public Safety functionality over LTE/5G+ with particularly deep understanding of network design, performance, and optimisation. In depth knowledge of 5G,5G+, LTE & SIP signalling, PTT (push to talk), SRTP/DTLS troubleshooting & Optimisation. Good understanding of 3GPP & ETSI specifications. Good understanding of DTLS/SRTP protocol. Requirements MANDATORY: -Extensive experience in mobile telecommunications industry in the role of a performance SME with business-critical, high-availability / high-throughput systems and networks. -Able to provide technical solutions, processes definition for network performance & optimisation of 4G based RAN Macro network. -Proven experience in defining and understanding KPI definitions, formula and measurements of radio networks. -Able to analyse in depth, drive test logs, Wireshark traces and protocol analysers traces for 4G networks. -Good Knowledge of LTE parameters & timers. -Familiarity with test software &
devices (Nemo/TEMs/Accuver) & post processing tools (Actix). -Experience of working with 3rd parties' network/IT Suppliers. -Experience of Nokia RAN. PREFFERRED: -Knowledge of multiple vendor products including Nokia and Ericsson. -Knowledge of industry best practice methodologies for analysing, defining and documenting the link between input business requirements and output technical solutions. -Understanding of project management techniques and tools. -Experience of managing relationships with suppliers and third parties, of product/feature selection and of delivering those products into a production environment. -Experience of working with LTE/5G Commercial network based Public Safety solutions. Our Company Rubicon Consulting is a Talent management consultancy which helps you to optimise business performance and competitive advantage by choosing the right people first time

## Description

ESN Service. 9. Performance root cause analysis using multiple sources of data primarily from: 10. UE Application events/L1/L2/L3 information 11. Drive Test UE logs/Wireshark covering OSI L1-L7. but also, from: 1. ENodeB and CN protocol analysis. 2. 3rd Party OTT (Over the Top) protocol traces. 3. Coverage data. 4. Capacity data. 5. OSS performance data 6. Change logs. 7. Stakeholder management - work with key SMEs to understand the root cause. 8. Excellent Team player - ability to uplift team by knowledge sharing Technical Expertise: Expert knowledge of UE logs analysis Expert level hands-on experience in 5G and 5G+ investigations, parameter optimisations and E2E Investigations. Expert understanding of E2E 4G,5G, VoNR, SA, NSA, Slicing architectures and design. Expert understanding of Nokia and Ericsson vendor Expert in Wireshark, TEMS, Accuver, Nokia and Ericsson eNB/gNB logging systems, tracing, and analysis. In depth knowledge of Mobile networks particularly


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