Junior ML DevOps Engineer

Join the world's best Cyber Range team! We focus on the largest cyber exercises that help Estonia, NATO, and like-minded nations enhance their cyber defence capabilities. If you are motivated by meaningful challenges and strengthening cyber resilience where it matters the most, join our team! In addition to being the engine of cyber exercises, we serve as an official NATO DIANA testing center, and participate in top-tier research and development projects. As a foundation under the Estonian Ministry of Defence, we maintain strong partnerships across the defence sector and private industry. Behind every cyber exercise and international project is a team of exceptional people. At CR14, you’ll collaborate with highly capable experts who combine deep technical knowledge with a passion for innovation and continuous learning. Junior ML DevOps Engineer You have the unique opportunity to join our team, building an AI/ML platform to develop and train state-of-the-art AI-based cybersecurity agents. This is a hands-on infrastructure work in a security-sensitive environment, in collaboration with real external R&D teams building solutions on this very platform. We are looking for a junior engineer who wants to grow into a platform specialist: you will work alongside experienced engineers from day one, and we expect you to learn a lot on the job including ML infrastructure, cybersecurity practices, and working in a classified environment. We are looking for someone curious and driven to figure things out.  Key Responsibilities Help build and operate AI/ML infrastructure: GPU cluster management (Incus, LXD fork), Kubernetes (Talos Linux), model registry, inference serving, and data pipelinesMaintain reproducible, auditable environments with CI/CD and configuration management (Ansible, GitOps)Support platform users, internal and external: on-boarding, troubleshooting, and writing documentationDeploy and benchmark open-weight LLMs and other models on our own hardwareTake part in planning with R&D technical leads and project managers so you understand how infrastructure decisions connect to project content, budget, and scheduleLearn and apply security-by-design practices in a classified environment: hardening, isolation, patching, complianceGrow with the team and take on more ownership as your skills developThis role contributes to the Research and Development project AIDA, building into EU defence capabilities Ideal candidate must have Solid Linux fundamentals: comfortable on the command line, understand how services, networking, and permissions workFamiliarity with Git and basic scripting in Python or BashSome hands-on exposure to containers (Docker or similar) from work, studies, or personal projectsAbility to learn independently, ask good questions, and document what you findGood communication skills, both spoken and written, including proficiency in EnglishWillingness to apply for security clearanceReadiness to work on-site in Tallinn, with the option for partial hybrid work if desired Ideal candidate would have experience in or would be willing to learn Kubernetes, CI/CD pipelines, and configuration management (e.g. Ansible).  ML workloads: GPU drivers/CUDA, model serving (vLLM, Ollama, llama.cpp or similar), experiment tracking (Mlflow or similar).  Infrastructure as code, GitOps, and observability tooling (Terraform/OpenTofu, Argo CD/Flux, KubeFlow, Prometheus/Grafana).  Cybersecurity practices, methodologies and standards.  Working in restricted network environments.  A degree in computer science or IT is a plus, but relevant side projects or open-source contributions that show how you work counts just as much. You don’t need to tick every box, but if you have been tinkering with servers, containers, or local LLMs and want to do it seriously, with mentorship and in a real cybersecurity domain, then we are looking for you!  We offer Meaningful workAn innovative and driven work environment in a modern office in the heart of Tallinn, with dedicated desks for every employeeMotivated, supportive and fun teamInternational cyber security communityContinuous learning and professional growth opportunities35 days of annual leave, and additional 1 extra day off each quarter, altogether 39 days of paid vacation a yearEmployer-provided health insurance (after the probation period)Stebby sports compensation (after the probation period)Salary maintained during reservist training exercisesAverage salary (based on the previous 6 months) paid for the first 3 days of sick leaveEnjoyable team events every few months! Need more information? Our Recruitment Partner Liis will be happy to help you +372 56 989 930 liis.leidsaar@cr14.ee