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- Senior AI/ML Engineer
Senior AI/ML Engineer
Full-timeSenior
AI Tools
AirflowGenAIKubeflowLLM APIsLangfuseMLFlow
Tech Stack
PythonKubernetesDockerAWSGCPAzureGitHub ActionsCI/CDMLOps
Agent Workflow
Build and maintain AI Assistant (automating ~40% of merchant requests), AI Agent Copilot for support agents, and Voice Assistant. Work on agentic rollouts and behaviour improvements for existing AI assistant infrastructure.
About the Role
At SumUp, the Senior AI/ML Engineer role is critical for developing and deploying the next generation of AI-driven solutions that automate support and improve the experience for both merchants and support agents.
What You'll Be Doing
- Lead the Operations AI team designing and deploying scalable ML/AI solutions in production
- Architect, design, develop, and deploy AI systems ensuring reliability, high performance, and scalability
- Own development and maintenance of core AI products: AI Assistant (automating ~40% of merchant requests), AI Translation (enabling cross-language agent service), and AI Agent Copilot
- Develop and maintain ML infrastructure and pipelines for data processing, model training, serving, and monitoring
- Optimize and fine-tune machine learning models; manage large text datasets
- Apply software development best practices including Git, CI/CD, and unit testing
- Collaborate with Data Scientists, Product Managers, Developers, and stakeholders
- Rapidly master existing AI assistant infrastructure; work on behaviour improvements and agentic rollouts
- Lead Voice Assistant pilot and innovation initiatives
Requirements
- 7+ years as ML/AI Engineer building production systems
- Expert Python proficiency and software engineering skills
- Experience with GenAI/LLM APIs and production LLM evaluation
- Cloud platform experience (AWS, GCP, or Azure)
- MLOps tools familiarity (MLFlow, Kubeflow, Airflow, Langfuse)
- Kubernetes, Git, Airflow hands-on experience
- Data pipeline and API design expertise
- Docker and CI/CD pipeline knowledge
Location: Berlin, Germany. Posted: November 28, 2025.