About Me

Hi! I am a freelance data & machine learning engineer and a Ph.D. student at the Czech Technical University in Prague. My main areas of focus are machine learning, deep learning, and natural language processing, but I am also an experienced Python developer. My favorite technologies include Python, TensorFlow, PyTorch, Hugging Face, LangChain, Elasticsearch, scikit-learn, UNIX, and AWS.

Contact and personal details

• Full name: Vojtěch Cahlík
• E-mail:
• Phone:
• Location: Prague, Czech Republic
• LinkedIn: linkedin.com/in/cahlik
• ORCID: 0000-0002-4222-8746
• GitHub: github.com/vcahlik
• IČO (business identification number): 14128128

Professional Experience

• (2022-now) Freelance Data & Machine Learning Engineer
  • Collaboration with CoolPeople, Recombee, LearnerOn, knowdroids.ai, DataLab at FIT CTU in Prague, and AI Detem on various machine learning pipelines, natural language processing and large language model applications, search services, and miscellaneous microservices and backends.
  • Technologies: Python, Pandas, Tensorflow, Hugging Face, LangChain, Elasticsearch, Apache Airflow, FastAPI, Django, SQL, GraphQL, AWS
• (2020-2021) Machine Learning Engineer, Ernst & Young, Prague
  • Work on various data-related projects, e.g. machine learning pipelines for customer retention prediction, a human resources planning application, and a healthcare information system.
  • Technologies: Python, Pandas, scikit-learn, LightGBM, Tensorflow, Django, SQL, Azure
• (2018) Data Scientist Intern, Datamole, Prague
  • Gathering, preprocessing, and analysis of data from automated agricultural farms.
  • Technologies: Python, Pandas, scikit-learn, matplotlib, Git, Azure
• (2016-2017) Junior C++ Developer, AEVI CZ, Prague
  • Development of embedded applications for EFTPOS payment terminals.
  • Technologies: C/C++, SVN, Lua

Research Interests

• Machine learning
• Deep learning
• Natural language processing
• AI Safety
• Explainable AI
• Reinforcement learning