{ “@context”: “http://schema.org”, “@type”: “JobPosting”, “title”: “(IT) RAN Transmission Engineer”, “description”: “
Flint is looking for a Transmission Engineer for a contracting opportunity with one of the main telco providers in the UK.
Key Responsibilities
- Own and manage the complete E2E performance lifecycle across RAN, IP transport/backhaul, and EPC/5GC domains.
- Develop and maintain performance baselines, KPIs/KQIs, and SLAs across all network layers.
- Lead complex multi-domain root cause analyses using cross-stack performance indicators and diverse data sources (RAN OSS, crowd-sourced data, transmission, transport, and core network elements).
- Identify root causes of underperforming KPIs and define corrective measures to improve network performance.
- Investigate systematic and mission-critical issues affecting service performance.
- Deliver detailed E2E performance reports with clear recommendations and action plans.
- Analyse end-to-end signalling flows (S1/X2/NG, GTP-C/U, SIP/IMS, PFCP).
- Monitor and optimise EPC/5GC KPIs, including registration/attach success, bearer/session setup, VoLTE/VoNR call quality, and handover success.
- Assess and troubleshoot backhaul performance issues related to latency, jitter, congestion, and packet loss.
- Collaborate with IP/Transport teams to evaluate routing, QoS, traffic engineering, synchronisation (PTP, SyncE), and network resiliency.
- Identify bottlenecks across microwave, fibre backhaul, and aggregation networks.
- Coordinate with Core Engineering teams on capacity planning, feature enablement, and software upgrades.
- Work cross-functionally with internal teams and third-party suppliers to agree and implement performance improvements.
- Apply automation and analytics techniques (SQL, Python, Tableau, Power BI) to identify trends, anomalies, and optimisation opportunities.
Technical Expertise
- Deep understanding of LTE and 5G NR technologies, including mobility, capacity, interference, coverage, and VoLTE/VoNR performance.
- Strong knowledge of EPC and 5GC core network architecture and cloud-native network functions.
- Expertise in IP/MPLS, Ethernet, QoS behaviours, and transport network performance.
- Solid understanding of 3GPP and ETSI standards.
- Knowledge of DTLS/SRTP protocols.
- Strong troubleshooting capability using Wireshark and protocol analysers for 4G/5G networks.
- Good knowledge of LTE parameters and timers.
- Familiarity with test tools and devices such as Accuver and other industry-standard performance tools.
Company: Flint Technology Services Ltd
Location: Bristol
Job Description:
Flint is looking for a Transmission Engineer for a contracting opportunity with one of the main telco providers in the UK.
Key Responsibilities
- Own and manage the complete E2E performance lifecycle across RAN, IP transport/backhaul, and EPC/5GC domains.
- Develop and maintain performance baselines, KPIs/KQIs, and SLAs across all network layers.
- Lead complex multi-domain root cause analyses using cross-stack performance indicators and diverse data sources (RAN OSS, crowd-sourced data, transmission, transport, and core network elements).
- Identify root causes of underperforming KPIs and define corrective measures to improve network performance.
- Investigate systematic and mission-critical issues affecting service performance.
- Deliver detailed E2E performance reports with clear recommendations and action plans.
- Analyse end-to-end signalling flows (S1/X2/NG, GTP-C/U, SIP/IMS, PFCP).
- Monitor and optimise EPC/5GC KPIs, including registration/attach success, bearer/session setup, VoLTE/VoNR call quality, and handover success.
- Assess and troubleshoot backhaul performance issues related to latency, jitter, congestion, and packet loss.
- Collaborate with IP/Transport teams to evaluate routing, QoS, traffic engineering, synchronisation (PTP, SyncE), and network resiliency.
- Identify bottlenecks across microwave, fibre backhaul, and aggregation networks.
- Coordinate with Core Engineering teams on capacity planning, feature enablement, and software upgrades.
- Work cross-functionally with internal teams and third-party suppliers to agree and implement performance improvements.
- Apply automation and analytics techniques (SQL, Python, Tableau, Power BI) to identify trends, anomalies, and optimisation opportunities.
Technical Expertise
- Deep understanding of LTE and 5G NR technologies, including mobility, capacity, interference, coverage, and VoLTE/VoNR performance.
- Strong knowledge of EPC and 5GC core network architecture and cloud-native network functions.
- Expertise in IP/MPLS, Ethernet, QoS behaviours, and transport network performance.
- Solid understanding of 3GPP and ETSI standards.
- Knowledge of DTLS/SRTP protocols.
- Strong troubleshooting capability using Wireshark and protocol analysers for 4G/5G networks.
- Good knowledge of LTE parameters and timers.
- Familiarity with test tools and devices such as Accuver and other industry-standard performance tools.
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Posted: May 20th, 2026