Mobile Core / IMS Support Engineer (VoLTE)
On-siteMadrid, Madrid, Spain
Job Summary
Support and execute deployment projects for new solutions and platforms, while participating in expansions, upgrades, and evolutions of existing customer projects. Provide post-sales technical support for production platforms and services by analyzing, troubleshooting, and resolving technical incidents, including escalating complex issues until full resolution. Coordinate with internal teams, customers, vendors, and technical stakeholders, and prepare technical documentation, procedures, and reports. Participate in an on-call/standby support scheme and provide remote support or emergency activities as required. Strong experience in Value Added Services (SMSC/IN), Mobile Core networks, and IMS (VoLTE/VoWiFi) is mandatory, along with fluent Spanish and English.
Required Qualifications
- Strong experience in one or more of the following domains: Value Added Services (VAS) – SMSC / IN
- Strong experience with Value Added Services platforms, particularly SMSC and Intelligent Network (IN) environments
- Proven experience in integration, deployment, configuration, and operational support of SMS and IN service platforms
- Solid understanding of SMS service architecture, routing, and interworking within mobile networks
- Experience in service provisioning, troubleshooting, and performance analysis in VAS environments
- Knowledge of signaling protocols related to messaging and IN services (e.g., SS7/MAP, SMPP, Diameter)
- Strong technical and functional knowledge of Mobile Core networks, with focus on Packet Switched (PS) Core and IMS-based services
- Experience with Fixed and Mobile IMS architectures, including VoLTE and VoWiFi service implementation and support
- Proven experience in integration, deployment, upgrades, and operational support of core network nodes
- Good understanding of IMS signaling and protocols (e.g., SIP, Diameter) and end-to-end service flows
- Strong troubleshooting capabilities across mobile core and IMS environments
- Fluent Spanish and English are mandatory
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