VoIP & Linux Systems Engineer (SRE)

Devopsroles; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Cafeteria benefits

Referral bonuses up to PLN 6,000

Revenue sharing opportunities

Team mentoring by a dedicated Team/TEC

Team-building budget for events

Charitable initiatives & sports events

Inclusive, diverse work culture

Job summary

Inetum Polska sp. z o.o. is expanding its IT operations team to manage a large VoIP and Radius infrastructure across multiple environments. You will ensure stability, performance, and automated administration using Puppet and Debian-based clusters.

The role requires strong Linux expertise, ITIL familiarity, and scripting skills. Opportunities for professional growth, team mentoring, and involvement in security and optimization initiatives are provided.

Qualifications

• Bachelor's degree or equivalent in Computer Science or related field.
• Several years of IT operations experience with FOSS/SRE.
• Strong Linux admin skills, especially in clustered environments.
• Experience with ITIL processes (Incident, Problem, Change).
• Networking basics (TCP/IP, UDP).
• Automation scripting for operations (Bash, Python, Perl).
• Knowledge of virtualization (KVM, Proxmox, OpenStack) is a plus.
• VoIP & telephony knowledge (Asterisk, Kamailio) - a plus.
• Database admin (MySQL/MariaDB).
• Proactive, service-oriented mindset; good English; German a plus.

Responsibilities

• Operate, maintain, and enhance VoIP and Radius systems in high-performance data centers.
• Develop automated system management with Puppet and Debian clusters.
• Drive projects across design, implementation to deployment in VoIP/Radius environments.
• Performance analysis to ensure efficiency and reliability.
• Plan and execute feature rollouts and system updates.
• Regular maintenance: expansions, updates, upgrades.
• Troubleshoot and resolve issues in a structured way; manage upstream tickets.
• Participate in on-call rotation with extra compensation.

Skills

Linux administration

Scripting (Bash, Python, Perl)

ITIL processes

Networking (TCP/IP, UDP)

Troubleshooting

Open-source technologies

Education

Degree in Computer Science or related field

Tools

Puppet

Debian-based servers

KVM

Proxmox

oVirt

OpenStack

Asterisk

Kamailio

FreeRADIUS

MySQL/MariaDB

Job description

Inetum Polska sp. z o.o. is expanding its IT operations team to manage a large VoIP and Radius infrastructure across multiple environments. You will ensure stability, performance, and automated administration using Puppet and Debian-based clusters.

The role requires strong Linux expertise, ITIL familiarity, and scripting skills. Opportunities for professional growth, team mentoring, and involvement in security and optimization initiatives are provided.