(Junior) Data Scientist (m/f/d) Search / AI Forge
Core
Develop and improve production machine-learning services for retrieval, ranking, query understanding, and classification across CHECK24 products.
Role type
Junior Applied Machine Learning Engineer (Search & Ranking)
Builds
Scalable AI solutions for search and ranking, including hybrid search combining lexical retrieval, embeddings, and LLMs.
Domain
E-commerce, Travel, Applied Machine Learning, Information Retrieval
Deliverable
production ML models
Required skills
Python, PyTorch, classical machine learning (gradient boosting, regression, feature engineering), LLM applications and evaluation, API development (FastAPI), containerization (Docker), Git, systematic model evaluation, information retrieval fundamentals
Preferred skills
Knowledge of semantic search, recommender systems, learning-to-rank, agentic workflows
Technologies
Python, FastAPI, Docker, PyTorch, vector databases
Responsibilities
Develop and improve ML services for retrieval and ranking; Create reliable evaluation datasets and metrics; Build production-ready services from prototypes; Research promising approaches in IR and LLMs and translate to customer impact
Seniority
Junior, hands-on IC
