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Network Engineer — BGP / Juniper / EVPN-VXLAN / GPU Cluster Networking

circle b • Netherlands
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Operate and improve production network infrastructure including BGP, Juniper routing, and EVPN/VXLAN in a sovereign EU GPU cloud environment. Lead the expansion of internet exchanges, peering, and routing security while maintaining high reliability and observability. Requires proven experience in production datacenter/ISP networking, strong BGP knowledge, and fluent English.

Key Highlights
Hands-on ownership of production network operations with real routing (own ASN) and datacenter networking.
Focus on building out capabilities for a sovereign EU GPU cloud with strict data residency requirements.
On-site role in Hoofddorp, Netherlands, with visa sponsorship available.
Key Responsibilities
Operate and improve the production network, maintaining and evolving the Juniper routing and switching environment.
Own BGP operations on the company's ASN, including routing policy, filtering, communities, troubleshooting, and traffic engineering.
Operate EVPN/VXLAN in production and help extend it as the infrastructure grows.
Manage IPv4/IPv6 addressing and clean subnet allocation/assignment workflows.
Lead expansion into internet exchanges and peering, including planning, implementation, and validation.
Implement routing-security best practices such as RPKI/IRR hygiene and route-leak protections.
Lead the implementation of a practical DDoS mitigation approach covering technology, processes, and runbooks.
Use NetBox as the source of truth for network inventory and IP addressing.
Improve monitoring, alerting, and visibility using the existing toolchain and extending it where needed.
Create and maintain diagrams, runbooks, and change documentation to improve operational quality.
Support adjacent infrastructure areas such as Linux, virtualization, storage, or automation when network workload is lighter.
Technical Skills Required
BGP Juniper EVPN/VXLAN
Benefits & Perks
Competitive salary
Pension scheme
Visa sponsorship
Company gym
Modern office in Hoofddorp
Participation in relevant conferences and exhibitions across Europe
Nice to Have
Strong hands-on network security experience (firewall policy, segmentation, change discipline, rule hygiene)
Experience extending EVPN/VXLAN designs beyond day-to-day operations
Experience building DDoS mitigation workflows end-to-end
Experience driving improvements in environments with low structure
Experience with GPU cluster networking; RDMA/RoCE in production

Job Description

What we do

Circle B builds sustainable IT infrastructure for the AI and cloud era. For over a decade— we have designed and deployed datacenter, edge, and AI/HPC systems on Open Compute Project (OCP) hardware. We are independent, vendor-neutral, and ISO 9001 / 14001 / 27001 certified, with deployments across multiple countries.

Our newest initiative is a sovereign EU GPU cloud — operating under full Dutch/EU jurisdiction and beyond the reach of the US CLOUD Act, for regulated European organizations that cannot compromise on where their data lives.

The Role

Network Engineer — BGP / Juniper / EVPN-VXLAN / GPU Cluster Networking

The opportunity

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