StellDirVor is an independent consulting, trade and technology company specializing in immersive technologies for healthcare. We support organizations in implementing digital innovations - Virtual, Augmented and Mixed Reality as well as AI - particularly for learning, training and real-time assistance in clinical and care environments. By combining technology and healthcare, we help optimize processes, improve knowledge transfer and enhance quality of care.

Supported by a Germany (ZIM) and Taiwanese (GIPIP) partnership grant, we are currently developing ARAIAS - an AR- and AI-based hands-free training and assistance system for chronic wound care. Using AR smart glasses, the system enables 3D capture, AI-supported analysis, and standardized remote expertise and documentation directly at the point of care.

As our ML Engineer (Computer Vision & ML Ops), you will build the AI capabilities at the core of ARAIAS: evaluating and fine-tuning computer vision models on smart glasses data, running the ML operations behind them, and applying generative AI to create synthetic medical images for education. We’re at an early stage - moving from concept to working prototype - so the near-term focus is on validating models and building toward a proof of concept we can test in real education and clinical settings.

As part of a small team, you will own the full data lifecycle end to end - from sourcing, consent and annotation to preparation - alongside model development and deployment.

We welcome candidates at different experience levels. What matters most is a solid ML foundation and genuine awareness of the medical imaging domain.

Notes:

Due to the nature of the project, we can only consider candidates who are already residing in Germany.

Tasks

Select and benchmark pre-trained models and/or validated architectures for medical image analysis and adapt them to domain-specific data, ensuring robust performance under real-world conditions
Identify and adapt suitable generative AI models to create realistic synthetic medical images for education and training
Evaluate and fine-tune small language models (SLMs) for voice interaction - speech-to-text, intent understanding and text-to-speech - optimized for low-latency or on-device use with smart glasses
Research and assess state-of-the-art ML models and emerging trends, including Explainable AI (XAI), cybersecurity for ML, and deployment and distribution modes (edge vs. cloud, federated learning, model compression)
Plan and execute the ML operations pipeline - data gathering, annotation, preparation, training, testing and deployment
Propose a data collection strategy - research suitable public and clinical data sources, recommend patient consent and other administrative requirements for ML training (e.g., data protection agreements, ethics approval), and define collection and annotation protocols with clinical experts, including labeling guidelines and quality checks
Identify and validate factors that affect model performance - image conditions, dataset bias, patient diversity, data privacy and regulatory requirements
Define test strategies and metrics, and validate model outputs against clinician assessments
Perform build vs. buy analyses for models, tools and services, including cost comparison
Estimate compute and training costs and propose budgets for model training and deployment
Choose and set up training environments flexibly - local hardware or cloud - based on cost, data privacy and performance
Make pragmatic technical decisions appropriate for the current prototyping stage and document results clearly
Maintain clear, traceable documentation of data sources, models, experiments and design decisions to support audits and quality reviews
Evaluate and integrate additional sensors where feasible (e.g., depth, LiDAR, thermal, multispectral) and fuse them with RGB input

Requirements

Must-Have

Degree in Computer Science, Data Science, Biomedical Engineering, Mathematics or a related field - or equivalent practical background
Strong Python skills and hands-on use of PyTorch, OpenCV or TensorFlow
Solid understanding of computer vision - classification, object detection and image segmentation, 3D Reconstruction and Multi-View Geometry
Hands-on knowledge of transfer learning - adapting pre-trained models and fine-tuning them on custom datasets
Working knowledge of the full ML lifecycle - data preparation, training, evaluation and deployment
Basic knowledge of generative models (diffusion models or GANs) and common open-source libraries
Comfortable training models both locally (GPU workstation) and on cloud platforms
Able to estimate ML compute costs and compare build vs. buy options to support budget decisions
Awareness of medical imaging challenges - limited data, label variability between clinicians and class imbalance
Awareness of healthcare data privacy and ethics (e.g., GDPR, patient consent, anonymization) and why explainability and bias matter in clinical AI
Able to read research papers and apply them pragmatically
Self-directed and pragmatic - able to take initiative and own problems end-to-end in a lean team
Fluent in English - German is a bonus

Strong Plus

Projects or coursework in medical imaging or clinical AI
Familiarity with semi-supervised learning - leveraging limited or partially labeled data
Experience with 3D data processing - depth maps, point clouds or mesh reconstruction
Exposure to multi-modal learning - combining RGB and depth or LiDAR data
Edge AI or wearable deployment (e.g., TensorFlow Lite, ONNX, model quantization)
Knowledge of explainability methods (e.g., Grad-CAM, SHAP) or adversarial robustness
Familiarity with MLOps tools (e.g., MLflow, Weights & Biases, DVC, Docker)
Awareness of medical device regulation for AI software (e.g., EU MDR, IEC 62304)
Familiarity with small language models (SLMs) and speech pipelines (e.g., Whisper, on-device speech recognition and text-to-speech)

Benefits

Meaningful work - You help shape how technology redefines education and training in healthcare, with real impact on clinical outcomes
Ownership and creative freedom - You work autonomously, contribute your ideas directly, and have a genuine say in how the system is built
A learning culture - We support personal and professional growth through knowledge sharing, access to innovative tools and methods, and a dedicated learning budget
Flexible working - Remote-friendly setup with the option to work from our Munich office
Flat hierarchies and team spirit - A small, open, and trust-based team where communication is direct and everyone's voice matters
International collaboration - Work alongside a Taiwan-based partner covering technology, hardware and research

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