Infrastructure Security Engineer

The role The Nebius cloud and on‑prem infrastructure must be secured by implementing security controls, monitoring threats, ensuring compliance with industry standards and responding to security incidents. The ideal candidate has a strong background in cloud security, Linux hardening, and network security. Your responsibilities will include: Design and implement security measures to protect cloud and on‑prem infrastructure; Identify and remediate vulnerabilities in cloud environments, networks, and operating systems; Build and maintain cloud and infrastructure security tools; Perform security reviews, threat modeling and risk assessments of infrastructure components; Develop and maintain security guidelines for Network and SRE teams; Collaborate with Network and SRE teams to integrate security best practices into their processes and systems; Stay updated on the latest security threats, vulnerabilities, and mitigation techniques; Serve as a network and infrastructure security subject matter expert to other teams. We expect you to have: 6+ years of experience in network, infrastructure or cloud security; Strong understanding of modern cloud architectures and deployment models (VMs, containers, serverless, Kubernetes); Solid knowledge in networks, distributed systems and Linux systems engineering; Hands-on experience with network, VPN and Linux security; Understanding of IAM systems; Experience with security automation tools and scripting (e.g. Python, Bash, Go, etc.) and willingness to learn Go; Experience in using and accessing security of Infrastructure as Code (Terraform); Experience in hardening Linux based systems (apparmor, seccomp, etc.); Experience in hardening Kubernetes. It will be an added bonus if you have: Proficiency in securing AWS, GCP, or Azure environments; Experience in conducting threat‑modeling sessions; Experience in designing, building, and maintaining Identity Aware Proxies or Bastion hosts; Experience in translating compliance and regulation requirements into technical specifications; Experience in exploiting vulnerabilities in Linux kernel, VMs, containers, and networks; Experience in securing bare metal workloads; Security certifications such as OSCP or CKS. We conduct coding interviews as part of the process.