Senior Network Engineer — Global Infra & Upgrades (Remote)

Sii Sp. z o.o.; Białystok; Remote; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Private healthcare

Benefits cafeteria platform

Car discounts

Job summary

Sii Sp. z o.o. in Białystok is seeking a senior Network Engineer to manage production network platforms across global POPs and data centers.

You will lead lifecycle management, coordinate upgrades, and collaborate with vendors to ensure reliability and performance. The role offers flexible remote work. The ideal candidate has 5+ years in production networks, hands-on with Cisco/Juniper/Arista, BGP, IPv4/IPv6, and scripting with Python or similar, plus Ansible for automation.

Qualifications

• Minimum 5 years of experience in a production network environment.
• Hands-on experience with networking platforms such as Cisco, Juniper, or Arista.
• Proficiency in core networking protocols, including BGP, OSPF/ISIS, and IPv4/IPv6.
• 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

Database Administration

BGP

IPv4/IPv6

Communication skills

Splank

Tools

Cisco

Juniper Networks

Arista

OSPF/ISIS

Ansible

Python

Job description

Sii Sp. z o.o. in Białystok is seeking a senior Network Engineer to manage production network platforms across global POPs and data centers.

You will lead lifecycle management, coordinate upgrades, and collaborate with vendors to ensure reliability and performance. The role offers flexible remote work. The ideal candidate has 5+ years in production networks, hands-on with Cisco/Juniper/Arista, BGP, IPv4/IPv6, and scripting with Python or similar, plus Ansible for automation.