Senior Network Engineer - Global Infra (Juniper) Remote

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

Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with major brands

Internal trainings center

Experts to learn from

Open management

Profit sharing

MySii app

Medical care

Job summary

Sii Poland is seeking an experienced Senior Network Administrator to manage production network platforms, including lifecycle management across global POPs, data centers, and backbone infrastructure. The role offers flexible remote work and opportunities to collaborate with network engineers and vendors to ensure operational excellence.

You will drive network upgrade initiatives, validate hardware configurations in a dedicated lab, and contribute to documentation and runbooks to improve

Qualifications

• Minimum 5 years in a production network environment
• Experience with Cisco/Juniper/Arista hardware
• Strong knowledge of BGP, OSPF/ISIS and IPv4/IPv6
• Experience handling vendor escalations and resolutions
• Advanced English proficiency

Responsibilities

• Support lifecycle management for production network platforms across global POPs and data centers.
• Plan, coordinate and execute fleet-wide network upgrade initiatives with readiness checks.
• Lead infrastructure rollout across global POPs, data centers and backbone network.
• Operate a dedicated lab and test environment to validate hardware and automation tooling.
• Partner with network engineers and vendors to investigate platform issues and document resolutions.
• Collaborate cross-functionally to support network scalability, compliance, and operational consistency.
• Contribute to runbooks, processes and procedures for network changes and lifecycle activities.

Skills

Network operations

Vendor management

English proficiency

BGP

OSPF/ISIS

IPv4/IPv6

Tools

Cisco

Juniper

Arista

Job description

Sii Poland is seeking an experienced Senior Network Administrator to manage production network platforms, including lifecycle management across global POPs, data centers, and backbone infrastructure. The role offers flexible remote work and opportunities to collaborate with network engineers and vendors to ensure operational excellence.

You will drive network upgrade initiatives, validate hardware configurations in a dedicated lab, and contribute to documentation and runbooks to improve