Senior Application Security Engineer

vCluster Labs | Multiple Engineering Roles | REMOTE (US, Canada, Europe) | Full-time | $140k-$220k USD | $140k-220k CAD | €80K – €145K + Equity vCluster Labs builds the software layer that turns hardware into a cloud. One platform to turn raw compute into every kind of cluster, for the teams building AI infrastructure and the customers they serve. We're a VC-backed startup in hyper-growth and fully remote. We have several open roles, here are a few to highlight: Senior/Staff Backend Engineer — Build controllers and operators at the core of the platform. Strong fit if you've authored Kubernetes controllers/operators from scratch using kubebuilder, controller-runtime, or client-go. Apply: https://www.vcluster.com/careers?ashby_jid=516c8859-83be-453... or https://www.vcluster.com/careers?ashby_jid=7a0a3f38-e7bf-407... Senior Inference Engineer — Our first dedicated inference hire. Production deployment/serving experience with vLLM, SGLang, or TensorRT-LLM, hands-on inference optimization (quantization, batching, caching, routing), strong Python or Go. Senior Application Security Engineer — Kubernetes internals from an exploitation/attack-surface perspective, hands-on container breakout and privilege escalation experience, real code-level security review, and threat modeling. Apply: https://www.vcluster.com/careers?ashby_jid=83c81a73-973f-406... vNode Engineering Tech Lead — Build vNode, our tenant-isolation container runtime (Linux user namespaces and seccomp, no VM, no virtual kubelet). Container runtime internals (containerd, CRI-O, runc), Kubernetes node-level depth (kubelet, CRI layer), Linux isolation primitives (seccomp, user namespaces, cgroups). Apply: https://www.vcluster.com/careers?ashby_jid=c6a9423d-5f1f-4f4... Full list of open roles: https://www.vcluster.com/careers Feel free to reply here with any questions.