Senior Global Network Engineer (Juniper & Upgrades) Remote

Sii Poland; Bydgoszcz; On-site; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Great Place to Work

Contracts with the biggest brands

Centre of internal trainings

Profit sharing

Regular integration events and trips

Job summary

Sii Poland is seeking an experienced Senior Network Administrator to join our team, focusing on managing and supporting production network platforms and lifecycle management across global POPs and data centers. This role collaborates with network engineers and vendors to ensure operational excellence while executing network upgrade initiatives.

The position offers the flexibility of remote work and involves leading infrastructure rollout, lab validation, and documentation of network changes and

Qualifications

• Minimum 5 years of experience in a production network environment with operational execution.
• Hands-on experience with networking platforms such as Cisco, Juniper, or Arista.
• Proficiency in core networking protocols, including BGP, OSPF/ISIS, and IPv4/IPv6.
• Solid understanding of large-scale network operations, including executing network change operations and software upgrades.
• Demonstrated ability to manage vendor escalations and coordinate support resolution.
• Advanced level of English.

Responsibilities

• Supporting lifecycle management for production network platforms, including hardware, software, firmware, and operating system 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

Network administration

Networking hardware

BGP

OSPF/ISIS

IPv4/IPv6

Vendor management

English proficiency

Tools

Python

Ansible

Job description

Sii Poland is seeking an experienced Senior Network Administrator to join our team, focusing on managing and supporting production network platforms and lifecycle management across global POPs and data centers. This role collaborates with network engineers and vendors to ensure operational excellence while executing network upgrade initiatives.

The position offers the flexibility of remote work and involves leading infrastructure rollout, lab validation, and documentation of network changes and