This list contains only the countries for which job offers have been published in the selected language (e.g., in the French version, only job offers written in French are displayed, and in the English version, only those in English).
We are seeking a highly experienced specialist to ensure the continuous availability, stability, and performance of international roaming platforms and services, including 5G SA/NSA, Diameter Routing solutions, signalling systems, and value-added roaming services. The individual will act as a subject matter expert, handling incident resolution, change delivery, platform optimisation, and vendor engagement while contributing to operational excellence, security compliance, and service improvements
Job Responsibility:
Manage all hardware, software, and configuration tasks across roaming platforms, ensuring timely resolution of incidents within agreed SLAs
Support Incident Management teams by leading complex incident investigations, delivering root cause analyses, and implementing permanent fixes
Own, plan, and execute changes by reviewing and performing Methods of Procedure (MoPs) for software upgrades, capacity enhancements, certificates, security patches, and platform updates
Review and validate changes initiated by external teams to ensure risk-free implementation and continuous service availability
Monitor and optimise core network KPIs, identifying deviations and implementing corrective actions
Troubleshoot 2G/3G/4G/5G SA/NSA protocol-level message flows as per 3GPP standards
Collaborate closely with external vendors to resolve complex technical issues and obtain required support
Drive cybersecurity compliance by ensuring timely execution of patches and security hardening
Support new project transitions by reviewing HLDs and LLDs, conducting functional and non-functional validations, and performing system testing
Identify and deliver service improvement initiatives focused on operational tools, processes, and workflows
Participate in trainings and knowledge-sharing workshops to build expertise across the team
Requirements:
Experienced in 3GPP technologies, including 4G and 5G SEPP
Skilled in working with PAAS and CAAS-hosted platforms
Strong understanding of roaming and interconnect networks, including Diameter, SS7, N32 signalling, and GTP
Proficient in Linux administration across multiple distributions
Demonstrates strong analytical thinking, problem-solving ability, and a solutions-driven mindset
Holds 12+ years of telecom core operations experience, with expertise in platforms such as Tekelec DRA, Oracle STP, firewalls, number portability databases, 5G SEPP, and Tomia VAS systems
Experienced with Kubernetes, virtualisation, clustering, and Linux systems like Red Hat, CentOS, and Ubuntu
Skilled in vulnerability management, security hardening, and database support
What we offer:
Opportunity to work on next‑generation global roaming and signalling platforms
Exposure to evolving 5G SA/NSA technologies and cross‑functional global teams
Involvement in high‑impact operational excellence initiatives and innovation activities
Ability to shape and influence technical improvements across critical telecom systems