Security Engineer - DevSecOps

About Nebul At Nebul, we’re building Europe’s sovereign AI cloud — trusted, secure, and purpose-built for the next generation of intelligent infrastructure. Unlike traditional cloud providers, Nebul operates its own infrastructure end-to-end. From bare-metal servers and GPU infrastructure to networking, Kubernetes, platform services, and AI workloads, we build and operate the complete technology stack ourselves without relying on public cloud hyperscalers. Security is therefore not something we add afterwards. It is a fundamental part of how we design, build, and operate our platform. As Nebul continues to scale, we’re looking for a Medior / Senior Security Engineer to join as our first dedicated security engineer and help build our technical security capabilities together with our CISO and engineering teams. What You’ll Be Doing As a Medior / Senior Security Engineer, you’ll work directly with our CISO in a highly technical hybrid DevSecOps and SecOps role, with an approximate 70/30 split. Roughly 70% of your time will focus on DevSecOps: working closely with our Cloud, AI, Platform, and Infrastructure teams to integrate security directly into development processes, CI/CD pipelines, Kubernetes environments, and our underlying infrastructure. The remaining 30% will focus on SecOps: strengthening vulnerability management, security monitoring, detection capabilities, and incident response as Nebul’s environment continues to grow. As the first dedicated engineer in this area, you’ll have significant ownership. You won’t simply operate an existing security stack — you’ll help decide what we build, how we build it, and how security becomes embedded into the way engineering teams work. Key Responsibilities Integrate security directly into CI/CD pipelines and engineering workflows across Nebul.Implement and maintain security scanning using tools such as Semgrep, Trivy, Gitleaks, Checkov, and comparable open-source technologies.Build automated security checks covering source code, dependencies, secrets, containers, and infrastructure-as-code.Work closely with Cloud, Platform, AI, and Infrastructure engineers to identify vulnerabilities, explain root causes, and implement practical remediation.Secure Kubernetes environments through RBAC, Network Policies, Admission Controllers, workload policies, and related controls.Strengthen container lifecycle security, including image scanning, registry hardening, image signing, and verification.Improve Linux security at operating-system level using technologies and controls such as eBPF, SELinux/AppArmor, kernel hardening, and systemd security features.Build security automation and integrations using Python, Bash, and/or Go.Interact with APIs and process JSON/YAML output from security scanners and infrastructure tooling.Build custom webhooks, alerting mechanisms, and security workflows where off-the-shelf integrations are not sufficient.Develop and mature vulnerability management processes and remediation workflows.Improve security logging, monitoring, alerting, and detection capabilities.Support investigation and handling of security incidents when they occur.Help continuously mature Nebul’s Security Operations capabilities as the company and platform scale.Contribute technical security expertise to broader initiatives around ISO 27001, SOC 2, NIST, and other relevant security frameworks.Take ownership of security engineering initiatives and continuously improve our security architecture, tooling, and operational practices.What Your Day Will Not Look Like Spending most of your time completing compliance questionnaires or writing security policies. Managing a collection of SaaS security products while someone else owns the underlying infrastructure. Running security scanners, forwarding the findings to engineering, and considering the job done. Working in an environment where security architecture and tooling have already been completely defined for you. What You Bring 3 to 6+ years of experience in security engineering, DevSecOps, or a highly technical SecOps role. Hands-on experience integrating and managing security tooling within CI/CD pipelines. Practical experience with tools such as Semgrep, Trivy, Gitleaks, Checkov, or comparable open-source security technologies. Experience working in self-hosted, bare-metal, private-cloud, or similarly infrastructure-heavy environments. A strong understanding of Linux system administration and the ability to secure infrastructure at operating-system level. Solid knowledge of Kubernetes security principles, including RBAC, Network Policies, and Admission Controllers. Experience securing container lifecycle management, including registries, image scanning, signing, and verification. Strong scripting and automation skills using Python, Bash, and/or Go. Confidence working with APIs, JSON, YAML, security scanner output, webhooks, and custom integrations. General knowledge of industry-standard frameworks such as ISO 27001, SOC 2, or NIST. The ability to clearly explain the root cause and impact of a vulnerability to an engineer and collaborate on the appropriate fix. A self-starting mindset and the ability to operate with autonomy, take ownership, and drive technical security projects forward. Bonus Points If You Have Experience securing large-scale Kubernetes or GPU infrastructure environments. Hands-on experience with eBPF-based security, runtime detection, or workload observability. Experience implementing software supply-chain security, SBOMs, artifact signing, or policy enforcement. Experience with detection engineering, SIEM pipelines, or security automation. Experience helping build a security engineering or Security Operations capability from an early stage. Knowledge of AI infrastructure, HPC, OpenStack, or sovereign/private-cloud environments. Eligibility & Application Information We welcome non-native Dutch speakers to apply. However, to be eligible, you must: Have a valid work permit in the Netherlands.Reside in the Netherlands and be able to travel to the office near The Hague.Be fluent in English (Dutch is not required).Ready to help build security into the foundation of Europe’s sovereign AI cloud? Apply now through Frank Poll and help Nebul build secure, resilient infrastructure for the next generation of AI.