We are seeking a highly skilled customer technical advocate (ctca) to act as a key liaison between the customer and technical teams, ensuring high-quality delivery of telecom services. The ideal candidate will bring deep expertise in core network technologies, strong troubleshooting capabilities, and proven experience in customer-facing roles. This position requires ownership of technical issues, effective communication, and proactive engagement to maintain customer satisfaction and operational excellence. Key responsibilities: serve as the primary technical advocate and point of contact for the customer. Provide expert support for core network technologies, with a focus on ims-based solutions (vo lte, vo wi fi, 5 g). Troubleshoot and resolve complex issues across ip networks, cloud infrastructure, and telecom systems. Manage and drive technical escalations, coordinating with cross-functional teams to ensure timely resolution. Deliver clear and concise technical communication through reports, presentations, and meetings. Support 24/7 on-call operations, including emergency response and incident handling. Collaborate with internal and external stakeholders to ensure seamless service delivery. Monitor system performance and proactively identify and mitigate potential risks. Utilize network tools and analyzers to diagnose and resolve issues effectively. Required qualifications: technical skills: strong expertise in mobile core network technologies, including lte, vo lte, vo wi fi, and 5 g. Deep understanding of ims (ip multimedia subsystem) architecture and solutions. Knowledge of telco cloud environments, including vnf (virtual network functions) and cnf (cloud-native network functions). Experience with cloud computing and orchestration tools, such as: kubernetes, docker, containers open stack helm, ansible microservices architecture monitoring tools like grafana strong understanding of network protocols, including: tcp/ip, routing & switching dns, radius, ldap map, diameter (policy control & charging) network security & network management advanced troubleshooting skills in ip networking, unix, and linux environments. Experience using network analyzers and diagnostic tools. Communication & collaboration skills (mandatory): excellent written and verbal communication skills in english. Strong ability to communicate complex technical concepts clearly to both technical and non-technical audiences. Proven customer-facing experience, preferably in telecom or network environments. Demonstrated ability in escalation management and cross-functional coordination. Strong leadership and stakeholder management skills. Preferred qualifications: experience with nokia telecom products and processes. Knowledge of project management methodologies. Understanding of business processes and service delivery models.