Builders Jobs

About The Position

Requirements

• 7+ years of experience in infrastructure, systems engineering, or platform engineering
• Deep experience with Linux-based virtualization, including: KVM/QEMU, libvirt or similar tooling
• Strong understanding of: CPU scheduling and NUMA architectures, Memory management and performance tuning, Storage I/O paths and performance characteristics
• Experience designing and operating virtualization platforms at scale (hundreds+ hosts)
• Solid networking fundamentals, including: Linux networking (bridges, bonding, VLANs), High-performance networking concepts
• Experience with infrastructure automation (e.g., Ansible, Terraform, or similar)
• Strong troubleshooting skills across distributed systems

Nice To Haves

• Experience in cloud or CSP environments (public or private)
• Familiarity with: GPU workloads and passthrough (VFIO), SR-IOV and advanced NIC features
• Experience integrating virtualization with: Kubernetes platforms, Bare metal provisioning systems (e.g., MAAS)
• Exposure to distributed storage systems (e.g., Ceph, Weka, or similar)
• Experience working in high-performance or low-latency environments

Responsibilities

• Design and implement a scalable virtualization platform capable of supporting high-density compute and GPU workloads
• Lead the evolution from existing platforms (e.g., Proxmox) toward KVM/QEMU-based architectures
• Define standards for VM lifecycle management (provisioning, scheduling, migration), performance isolation and resource allocation, failure domains and resilience strategies
• Optimize virtualization for high-performance workloads, including NUMA alignment, CPU pinning and scheduling, PCIe topology awareness, GPU passthrough and device assignment
• Partner closely with networking and storage teams to integrate high-throughput, networking (e.g., SR-IOV, RDMA), distributed and local storage systems
• Build and improve automation for hypervisor deployment and configuration, image pipelines, cluster scaling and lifecycle management
• Troubleshoot deep system-level performance issues across compute, memory, storage, and network layers
• Contribute to long-term platform architecture and infrastructure strategy

Benefits

• Stock Options
• 100% paid Medical, Dental, and Vision insurance for Employees
• Company Health Savings Account Contributions
• 100% paid Short Term and Long Term Disability Insurance for Employees
• Life and Voluntary Supplemental Insurance Options
• Other Insurance Options, such as Pet & Legal Insurance
• Various Supplementary Health Benefits, such as discounted Virtual Healthcare Appointments and Serious Illness Support
• Flexible Spending Account
• 401(k)
• Employee Assistance Program
• Flexible PTO
• Paid Holidays
• Parental Leave
• Other In-Office Perks