Software Engineer, Autonomous Cloud Network – DC Infrastructure

Role Overview

• Design, build, and operate Mercari's on-prem DC/GPU infrastructure, including data-center facilities (racks, power, cooling) and the supporting network
• Design and build the network foundation for GPU workloads: compute fabric (InfiniBand/RoCE), storage/in-band, service network, and isolated OOB management
• Design, configure, and operate routing for the on-prem GPU fabric and its cloud/platform interconnects using BGP (and OSPF/IS-IS, VLAN/VRF as needed), including ASN planning, route summarization, and routing policy
• Coordinate with data-center providers and SI partners on facility readiness, equipment procurement, lead times, and remote-hands/installation work
• Manage Mercari's internal data center end to end, including vendor/SI discussions, commercial negotiations, and contract & procurement handling
• Perform hands-on, on-site data-center networking work — running and changing cabling, and configuring routers, switches, firewalls, and other network devices (this role requires regular physical visits to our data center)
• Integrate the on-prem DC/GPU environment securely with existing corporate, cloud (GCP/AWS), and platform networks
• Establish monitoring, alerting, logging, and operational handoff for GPU systems and network devices
• Support GPU PoC execution and help define the path from PoC to production
• Automate provisioning and operations, and manage configuration as code (IaC)
• Collaborate closely with the Corporate IT team on data-center facilities, connectivity, and on-site operations (this collaboration is required for the role)
• Collaborate with ML Platform, Infrastructure, Security, and Procurement stakeholders

Requirements

• Strong networking fundamentals (TCP/IP, IP address management, OSI layers 2–7, routing, DNS, TLS, HTTP)
• Hands-on experience designing, configuring, and troubleshooting data-center routing and switching, especially BGP (ASN planning, route summarization, and routing policy), as well as OSPF, VLAN/VRF
• Hands-on experience designing and operating physical/data-center networking (switches, routers, firewalls, structured cabling)
• Production experience operating Linux servers
• Hands-on data-center experience, including for GPU/high-density systems: physically installing and changing cabling and configuring routers, switches, and firewalls on-site (this role requires regular in-person visits to our data center)
• Experience with data-center operations: racks, power, cooling, cross-connects, and coordinating remote-hands / installation work
• Experience managing data-center vendors and SI partners, including commercial discussions and contract/procurement handling
• Experience integrating on-prem and cloud networks (GCP or AWS), including VPN, proxies, and routing
• Ability to automate workflows using Python or Bash and to manage configuration using Infrastructure as Code (IaC)
• Experience writing design documents and working with internal stakeholders and external vendors/SIers
• Empathy with Mercari's mission and values.

Tech Stack

• AWS
• Cloud
• DNS
• Firewalls
• Google Cloud Platform
• Linux
• Python
• Switching
• TCP/IP