Network Engineer with Juniper - large scale intrastructure (f/m/x)

Sii Sp. z o.o.; Toruń; Remote; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Great Place to Work

Profit sharing

Private healthcare

Remote work

Career growth

Job summary

Sii Sp. z o.o. in Toruń is seeking a Senior Network Administrator to oversee lifecycle management of production network platforms across global POPs and data centers.

You will lead upgrade initiatives, collaborate with vendors, and drive operational excellence in a large-scale infrastructure environment. The role requires strong experience with major vendors (Cisco/Juniper/Arista), proficiency in BGP and IPv4/IPv6, and advanced English.

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.
• Experience in large-scale network operations and executing network change operations.
• Ability to manage vendor escalations and coordinate support resolutions.
• Advanced level of English.

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 to validate hardware, configurations, and automation tooling.
• Collaborate with network engineers and vendors to investigate issues and document resolutions.
• Support cross-functional initiatives for scalability, compliance, and operational consistency.
• Contribute to runbooks and procedures for network changes and lifecycle activities.

Skills

BGP

IPv4/IPv6

Network Administration

Juniper

Cisco

Arista

Ansible

Python

Splunk

Network Infrastructure

Communication skills

Job description

Network Engineer with Juniper - large scale infrastructure (f/m/x)

Miejsce pracy: Toruń

Technologies we use

• Network Administration
• Database Administration
• Cisco
• Juniper Networks IDP
• Arista
• BGP
• IPv4/IPv6
• Splank
• Network Infrastructure

• Communication skills
• Ansible
• Python

About the project

We are looking for an experienced Senior Network Administrator to join our team, focusing on managing and supporting production network platforms. In this role, you will be responsible for lifecycle management across global Points of Presence (POPs), data centers, and backbone infrastructure. You will collaborate with network engineers and vendors to ensure operational excellence while executing network upgrade initiatives and maintaining network infrastructure. This position offers the flexibility of remote work. If you are passionate about network administration and infrastructure management, this opportunity may be the right fit for you.

Your 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

Our requirements

• Minimum 5 years of experience in a production network environment with a focus on 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

• Strong organizational and execution skills with attention to detail
• Effective cross-functional communication and collaboration skills
• Scripting ability in Python or a similar language
• Familiarity with network automation tools such as Ansible
• Experience improving operational processes by reducing manual steps and increasing repeatability

What we offer

• Great Place to Work since 2015 - it's thanks to feedback from our workers that we get this special title and constantly implement new ideas
• Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
• We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
• Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
• Comfortable workplace - class A offices or remote work
• Dozens of fascinating projects for prestigious brands from all over the world - you can change them thanks to Job Changer application
• PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
• Investment in your growth - meetups, webinars, training platform and technology blog - you choose
• Fantastic atmosphere created by all Sii Power People

Sii Sp. z o.o.

Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.

Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.