Senior Core Network Engineer – IP/MPLS & 3GPP (EPC)

Inetum Portugal

4d•Hybrid

About The Position

We are looking for a highly Senior Core Network Engineer – IP/MPLS & 3GPP (EPC) to provide specialized technical services in critical network environments. The goal of this role is to reinforce the operation, evolution, and resilience of the infrastructure, ensuring high standards of availability, security, and alignment with network engineering best practices. This position requires a high level of autonomy, strong advanced troubleshooting capabilities, and the ability to support technical decision‑making in high‑complexity and mission‑critical scenarios.

Requirements

Senior profile with over 10 years of experience in network engineering, with solid expertise in critical environments, including engineering and/or operations roles within 3GPP (EPC) environments and MPLS networks.
Bachelor’s degree in Telecommunications Engineering
Proven experience in: IP/MPLS networks (core and transport), Data center infrastructures, High‑availability and mission‑critical environments
Strong expertise in the following technologies and platforms: Cisco (Routing, Switching, CallManager, ISE), NOKIA (core and transport environments), Firewalls : Cisco, Fortinet, and Check Point, DWDM infrastructures
CCNP Service Provider certification
Relevant experience in core operations and advanced‑level troubleshooting
Ability to execute technical tests, validations, and impact analysis
High level of autonomy , ownership, and technical maturity
Strong analytical skills and ability to solve complex problems
Clear and effective communication in technical and critical environments
Ability to work under pressure while maintaining service quality and stability
Strong collaboration skills with multidisciplinary teams and external vendors
Focus on best practices, risk mitigation, and continuous infrastructure improvement

Responsibilities

Data Center Network Infrastructure Management Operation, monitoring, and continuous evolution of data center network infrastructures
Technical support for high‑availability and resilient architectures
Execution of technical tests and connectivity validations in production and pre‑production environments
Administration and support of unified communications solutions , namely Cisco CallManager
Management and operation of access control and identity platforms , including Cisco ISE
Ensuring the continuity, performance, and quality of supported services
Network Security and Traffic Control Creation, modification, and validation of firewall rules in Cisco, Fortinet, and Check Point environments
Impact analysis, risk mitigation, and support for security requirements
Support in the resolution of network security incidents
Transport and Backbone Networks Operation and monitoring of IP/MPLS networks
Technical support for DWDM infrastructures
Analysis of link performance, stability, redundancy, and overall backbone quality
Specialized Technical Support and Advanced Troubleshooting Diagnosis and resolution of complex network incidents
Execution of tests, technical trials, and high‑criticality validations
Coordination with internal teams and technology vendors , particularly in NOKIA and CISCO environments
Technical support for decision‑making in critical and high‑pressure operational contexts