About the Position

MLOps / LLMOps Engineer Senior

Location: Brussels, BE

Employment Type: FULL_TIME

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About Cronos Europa

Cronos Europa is a leading IT and digital transformation partner dedicated exclusively to European Institutions and agencies, delivering mission-critical solutions that shape Europe's digital future. As part of the Cronos Group, one of the most innovative and fastest-growing tech ecosystems in Europe, we benefit from a vast pool of expertise and cutting-edge capabilities. With over 1,000 specialists across Belgium, Luxembourg, and the Netherlands, we combine deep institutional knowledge with strong engineering excellence to support long-term, high-impact EU programmes requiring reliability, scalability, and innovation.

About the Job

We are looking for an MLOps / LLMOps Engineer to design, deploy, monitor, and optimize production-grade machine learning and large language model systems within secure hybrid on-premise and cloud environments. The role combines ML engineering, infrastructure automation, containerisation, security awareness, and close collaboration with data science and backend development teams.

Responsibilities

• Design, build, and maintain production-grade ML systems with a strong focus on Large Language Models (LLMs) in a secure hybrid on-prem / cloud infrastructure.
• Deploy, test, manage, and monitor ML models in different containerised environments.
• Work closely with data scientists and back-end developers to build, test, integrate, and deploy ML models.
• Evolve the LLMOps lifecycle: data preparation, fine-tuning, evaluation, deployment, monitoring, and iteration. Develop evaluation frameworks for LLM quality, robustness, and regression tracking.
• Analyse performance metrics and troubleshoot issues to ensure high availability and reliability.
• Design CI/CD pipelines, use orchestration solutions, and data versioning tools.
• Create automated anomaly detection systems and constantly track their performance and optimize ML pipelines for scalability, efficiency, and cost-effectiveness.
• Provision of security studies, security assessments, or other security matters associated with information system projects.
• Provide support and guidance to other team members on LLMOps/MLOps practices.

Specific Expertise

• Excellent knowledge of managing an on-prem and/or cloud LLM / MLOps infrastructure.
• Excellent knowledge of containerisation and orchestration platforms (e.g. Kubernetes, Docker, Podman, EKS, PKS). Good knowledge of MLflow, TensorFlow (TFX) or equivalents.
• Good knowledge of Airflow.
• Good knowledge of AWS or EU cloud providers.
• Good knowledge of Python.
• Good knowledge of Unix and Bash.
• Good knowledge of agile software development methodologies.
• Good knowledge of infrastructure as code (Terraform, CloudFormation).
• Good knowledge of messaging services and platforms (e.g. Kafka, Redis, RabbitMQ).
• Knowledge of data security measures (knowledge of encryption mechanisms and ML security is considered a plus).
• Knowledge of NoSQL databases, such as OpenSearch, MongoDB, etc.
• Knowledge of query languages, such as SQL, Hive, Pig, etc. and with information extraction.
• Experience with data analytics over big datasets, non-structured databases, as well as data lakes.
• Experience with monitoring and logging tools (e.g. ELK stack, Prometheus, Grafana, OpenTelemetry, Cloudwatch).
• Experience with model testing and model validation in production environments.
• Ability to write clear and structured technical documentation.
• Good knowledge of European Commission grant management ecosystem (eGrants) would be an asset.
• EQF Level 6 or higher in a relevant field such as Computer Science, Information Technology, or Systems Engineering.

Skills and Competencies

• Strong problem-solving and analytical skills.
• Strong organisational and time-management skills.
• Strong team spirit and experience working effectively within a collaborative team.
• Capability of integration in an international/multi-cultural environment.
• Excellent communication skills to articulate complex technical concepts.
• Attention to detail in infrastructure design and well-structured documentation.
• Ability to write clean, efficient, and maintainable code.

If you wish to integrate a dynamic structure on a human scale while working with the latest technologies, don't wait anymore and join Cronos Europa.

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