Senior Telco Infrastructure Administrator

About our client

Our client is a technology company specializing in delivering modern Customer Experience, Contact Center, and CRM solutions for medium-sized and enterprise organizations. The company supports clients in digital transformation by designing and implementing omnichannel communication platforms, AI-powered automation, and advanced system integrations. Its portfolio includes projects built on leading cloud and customer engagement technologies, helping businesses optimize customer service processes and improve operational efficiency.

About the role

We are looking for an experienced Senior Telco Infrastructure Administrator to join a team responsible for maintaining and developing mission-critical SaaS and telecommunications infrastructure. In this role, you will manage highly available production environments, optimize system performance, automate operational processes, and support modern VoIP platforms. You will work across Linux infrastructure, networking, virtualization, and cloud technologies while contributing to the evolution of scalable and resilient platforms. This is an excellent opportunity for engineers who enjoy solving complex infrastructure challenges and influencing technology decisions.

Key responsibilities

• Administer, maintain, and develop Linux-based production infrastructure.
• Ensure high availability, scalability, and performance of mission-critical systems.
• Manage virtualization, containerization, and infrastructure automation.
• Maintain monitoring, logging, and alerting platforms.
• Support and optimize VoIP and telecommunications platforms.
• Design and maintain network infrastructure, including routing, VPNs, and firewalls.

Requirements

• Strong experience administering Linux environments (CentOS, Ubuntu, Debian).
• Hands-on knowledge of virtualization technologies (KVM) and container platforms, including Proxmox, OpenVZ, or K3s.
• Experience with Nginx, PostgreSQL, RabbitMQ, Redis, Consul, Elasticsearch/OpenSearch, and similar production technologies.
• Practical knowledge of monitoring and logging solutions such as Zabbix and Graylog.
• Experience supporting VoIP environments, including SIP, Kamailio, FreeSWITCH, SBCs, AudioCodes, or FreePBX.
• Solid networking knowledge, including BGP, OSPF, VPNs, firewalls, QoS, and platforms such as VyOS, Juniper, or MikroTik.
• Strong troubleshooting and problem-solving skills in production environments.
• Experience with Microsoft technologies, cloud platforms (Azure or GCP), Hyper-V, WebRTC, or 3CX will be considered an advantage.