• Deploy and turn up Juniper EX/QFX, Arista 7020/7280, and Ciena platforms in EVPN/VXLAN spine-leaf fabrics• Troubleshoot BGP/IS-IS underlay and EVPN/VXLAN overlay control-plane and data-plane issues• Perform fabric expansions, capacity planning, and performance tuning in live production environments• Create and maintain network diagrams, runbooks, and configuration standards for repeatable deployments• Work directly with Security, Critical Facilities (BMS), and application teams to integrate data center services into the fabric• Rack, cable, and commission network hardware in data center environments

This description is a summary of our understanding of the job description. Click on 'Apply' button to find out more. Role Description We are a Web3 infrastructure platform hosting tens of thousands of blockchain nodes, ensuring stable, secure, and decentralized network operations. - 120+ supported networks (Ethereum, Solana, Polygon, Cosmos, Avalanche, and others) - 99.99% uptime - Own bare-metal infrastructure - No shared nodes and no third-party RPC providers - We build large-scale distributed infrastructure where network architecture is a critical part of overall platform reliability and performance. Responsibilities - Design and maintain L2/L3 network architecture across distributed data centers - Configure and operate Arista EOS and/or Juniper JunOS - Configure and optimize BGP / OSPF - Design and develop EVPN/VXLAN architecture - Optimize network performance for high-load blockchain nodes and RPC infrastructure - Configure and tune Mellanox / Nvidia network interface cards - Work with bare-metal servers - Diagnose latency, packet loss, jitter, and performance bottlenecks - Integrate networking solutions with Kubernetes and NodeOps infrastructure - Automate configurations using Ansible / Python / Bash - Contribute to building a highly available multi-DC architecture Requirements - Hands-on experience with Arista EOS and/or Juniper JunOS - Strong understanding of BGP and OSPF - Solid knowledge of Layer 2 / Layer 3 network design principles - Experience with EVPN/VXLAN architectures - Experience configuring and optimizing Mellanox / Nvidia NICs - Expert-level Linux knowledge (Debian / Ubuntu) - Automation skills (Bash, Python, Ansible) - Experience working with bare-metal infrastructure Nice to Have - Experience in hosting / node provider / Web3 infrastructure environments - Understanding of RPC traffic patterns and blockchain workloads - Experience with low-latency tuning - Experience working in multi-data-center environments Benefits - Work within a strong Web3 engineering team - Enterprise-grade infrastructure - Influence over architectural decisions - Minimal bureaucracy, strong engineering culture - Fully remote format

• Act as network design authority for new office builds and major refits • Partner with Facilities and Construction teams during site selection, design development, construction and pre-handover phases • Translate business, occupancy, and growth requirements into scalable Cisco campus designs • Design and approve structured cabling systems • Design and deploy Cisco Catalyst 9000 campus architectures • Validate carrier handoffs and DEMARC extensions • Participate in global on-call rotations supporting enterprise office networks

• Routing Engineering: Design and implement advanced BGP policies (Path Selection, Community strings, Filtering) to optimize multihoming and peering traffic across multiple IXPs. • MPLS and VPNs: Design, configure, and maintain the MPLS core, including LDP/RSVP-TE and deployment of L3 VPN services (VRF) and L2VPNs (VPLS/VPWS) for enterprise customers. • Optimization and QoS: Perform Traffic Engineering (TE) using RSVP-TE to ensure deterministic paths and apply QoS policies (DiffServ over MPLS) to prioritize critical services (Voice and Video). • Resilience: Implement high-availability and fast-convergence mechanisms such as BFD (Bidirectional Forwarding Detection) and MPLS FRR (Fast Reroute) to meet stringent SLAs (five nines). • Edge Technologies: Manage edge routers (Provider Edge - PE) and CGN (Carrier-Grade NAT) solutions, and design IPv6 transition strategies (Dual Stack or DS-Lite). • Level 3 Troubleshooting: Lead resolution of complex incidents involving packet loss, microbursts, high latency, and protocol failures (BGP session flapping, OSPF/IS-IS adjacency issues).