Virtualization Software Engineer

Role Summary
Ubiquiti’s Prague office is looking for a Virtualization Software Engineer to build a new internal platform for managing virtual machines at scale. You’ll design and implement a greenfield service on top of libvirt/QEMU that orchestrates VM lifecycle and virtual network topologies, exposed via an API to other internal systems.

The project stack:

• C++ (greenfield project — not a hard requirement; e.g. Go or Rust are fine if you make the case)
• libvirt / QEMU / KVM
• Linux (networking, bridging, virtio)

Responsibilities:

• Design and implement a service that manages VM lifecycle (create, start, stop, snapshot, destroy) on top of libvirt
• Expose a clean API consumed by other internal tools and services
• Model and provision multi-node virtual network topologies (bridges, VLANs, virtio-net)
• Own the component end-to-end: architecture, implementation, tests, observability, and documentation
• Collaborate with adjacent teams on integration and end-to-end scenarios

Requirements:

• 5+ years of professional software engineering experience
• Proficiency in C/C++ (or Go/Rust), with familiarity in Linux-based networking stacks
• Hands-on experience writing software against the libvirt API, QMP, or directly against QEMU/KVM — not just operating VMs through a GUI
• Solid understanding of Linux virtualization internals: KVM, virtio, vhost, network namespaces, bridging
• Comfortable designing and shipping long-lived services (APIs, lifecycle, error handling, observability)
• Excellent problem-solving, analytical, and debugging skills
• Strong communication and documentation abilities
• Fluency with modern AI-assisted development tools
• Fluent in English

Nice to Have:

• Experience with OVS / OVN or other programmable virtual switching
• Experience with SR-IOV, DPDK, or vhost-user data paths
• Experience building lab/CI infrastructure (Proxmox, libvirt-based topologies, automated topology bring-up)
• Fluent in Czech

Benefits:

• Competitive salary and 5 weeks of vacation per year
• Discretionary bonuses based on individual performance
• Flexible working hours, home office
• Top floor office near Andel with amazing view of Prague
• Kitchen packed with food, snacks & sodas, meal allowance
• A collective of developers who want to make the best product. Maximum effort to keep processes to a minimum, no complex reporting and similar habits