DevOps Engineer - Operation Services

At Polkomtel Infrastruktura (now part of CellNex / TowerLink), I worked as a DevOps Engineer supporting the internal diagnostic and observability systems behind one of Poland’s largest mobile telecommunications networks.

My role focused on building tooling for telecom engineers — enabling them to monitor, analyze, and respond to potential issues within the mobile core and access networks. I developed backend systems that collected and decoded diagnostic traffic from network appliances (eNodeB/gNodeB), helping detect anomalies and performance degradations before they could escalate.

One of my key contributions was the development of a high-throughput system capable of capturing, decoding, and storing proprietary debug protocols (such as Ericsson’s EBM) at ~1 Gbps in near-real-time — covering the national footprint of the network.

In addition to diagnostics, I managed and integrated OSS platforms from multiple vendors, maintained metric databases for MSISDN- and call-quality-level data, and worked closely with operations teams to improve visibility and data reliability across the infrastructure.

Although not visible to end users, this infrastructure observability directly empowered network engineers to maintain and optimize the performance of a nationwide mobile network — improving decision-making, service reliability, and SLA compliance, and ultimately affecting the experience of millions of customers.

Tech stack: Go, Python, Linux, UNIX, Zabbix, Prometheus, Grafana, PostgreSQL, Ansible