Senior Network Lifecycle & Infrastructure Engineer - Remote

Sii Poland; Katowice; Remote; PLN 180,000 - 320,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care

Job summary

Sii Poland is seeking an experienced Senior Network Administrator to join our team to manage production network platforms across global POPs, data centers, and backbone infrastructure, ensuring reliable operation and upgrade readiness. You will collaborate with network engineers and vendors to drive improvements.

The role offers remote work flexibility, challenging projects, and opportunities to contribute to runbooks, automation, and scalable networks, with English proficiency required.

Qualifications

• Minimum 5 years in production network environment with operations focus.
• Hands-on experience with Cisco/Juniper/Arista.
• Proficiency in BGP, OSPF/ISIS and IPv4/IPv6.
• Strong English language skills.

Responsibilities

• Supporting lifecycle management for production network platforms, including hardware, software, firmware, and OS versions across global POPs and data centers.
• Planning, coordinating, and executing fleet-wide network upgrade initiatives, ensuring device qualification and readiness checks are performed.
• Leading infrastructure rollout efforts across global POPs, data centers, and the backbone network.
• Operating a dedicated lab and test environment to validate hardware platforms, configurations, and automation tooling.
• Partnering with network engineers and vendors to investigate platform issues, manage support escalations, and document resolution paths.
• Collaborating cross-functionally to support network scalability, compliance, and operational consistency.
• Contributing to runbooks, process documentation, and operational procedures for network changes and lifecycle management activities.

Skills

Cisco/Juniper/Arista

BGP/OSPF/ISIS/IPv4/IPv6

Vendor escalation management

Network lifecycle management

Advanced English

Tools

Ansible

Job description

Sii Poland is seeking an experienced Senior Network Administrator to join our team to manage production network platforms across global POPs, data centers, and backbone infrastructure, ensuring reliable operation and upgrade readiness. You will collaborate with network engineers and vendors to drive improvements.

The role offers remote work flexibility, challenging projects, and opportunities to contribute to runbooks, automation, and scalable networks, with English proficiency required.