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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # RAN Engineer - **Company:** Flint UK Technology Services - **Location:** London, UK - **Salary:** £117,000.0 - **Contract:** Temporary contract - **Skills:** 4G (Telecommunication), LTE (Telecommunication), Data Analysis, Communications Protocols, Datagram Transport Layer Security, Network Planning and Design, Network Service, Open Systems Interconnection (OSI), Wireshark, Wireless Networks, Feature Selection - **Published:** September 2, 2026 - **Apply:** https://www.careerboard.com/pt/en/find-jobs-in-United-Kingdom/-B454C2E6E8FC5D2555/ ## About the Role * 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 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. 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. ## Description * Validate 5G and 5+ design - via UE logs analysis and E2E tracing - develop action plan for performance uplift via parameter or feature optimisation - root cause of performance degradation, either from Oss trends, UE logs, crowd source data or other data sources. * Conduct feature and or parameter optimisation trials for 4G/5G/5G+ RAN vendors (Nokia and Ericsson) and assess outcomes, quantify gains and impacts to wider network services. * 5G Interworking with 4G, 5G SA, NSA. * Own and drive improvement in all factors impacting Performance & reporting with the goal of providing optimal Customer Experience. * Exceptional understanding of network performance trends with a view of rebase lining KPIs. * Identifying the root cause and define measures to improve underperforming KPIs. * Analysing drive test logs and Network protocol traces for underperformance & defects in ESN PTT over SRTP. * Investigate detected and reported Systematic issues within this element of the ESN Service. * Performance root cause analysis using multiple sources of data primarily from: + UE Application events/L1/L2/L3 information + Drive Test UE logs/Wireshark covering OSI L1-L7. * Stakeholder management - work with key SMEs to understand the root cause. ## Related Videos - [Code meets connectivity - Developers as the powerhouse of Network API innovation](https://www.wearedevelopers.com/videos/1686-code-meets-connectivity-developers-as-the-powerhouse-of-network-api-innovation) - [Demystifying application networking in the cloud](https://www.wearedevelopers.com/videos/675-demystifying-application-networking-in-the-cloud) - [Data Science in Retail](https://www.wearedevelopers.com/videos/586-data-science-in-retail) - [How I saved 200K/yr in direct costs writing 0 code lines in K8s](https://www.wearedevelopers.com/videos/1055-how-i-saved-200k-yr-in-direct-costs-writing-0-code-lines-in-k8s) - [Unlocking the potential of Digital & IT at Vodafone](https://www.wearedevelopers.com/videos/602-unlocking-the-potential-of-digital-it-at-vodafone) - [Your organization as a Graph](https://www.wearedevelopers.com/videos/2051-your-organization-as-a-graph) ## Related Articles - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Basic And Advanced Networking in Dart and Flutter](https://www.wearedevelopers.com/magazine/112-basic-and-advanced-networking-in-dart-and-flutter) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)