Stefan Roth is a Data Scientist at kloeckner.i at kloeckner.i GmbH. He possess expertise in python, sql, machine learning, econometrics, data analysis and 38 more skills. He is proficient in Spanish and English. Colleagues describe him as "Stefan was a great asset in our team. Working with him as a Product Manager, he shone in bringing structure, clear communication and critical thinking in all the projects we worked on together. I could rely on him to lead the design and development of our pricing experimentations with rigor and to instill that culture to the more junior team members." and "Stefan Roth has been Data Science Trainer as a full-time employee at the Spiced Academy since November 2019. He is teaching our 3-month Data Science boot camp including, amongst others, the following topics: • Data Analysis with Python • Machine Learning Algorithms • Deep Learning • Relational Databases / SQL • AWS • ETL-Pipelines with Docker • Object-Oriented Programming and Design Stefan is extremely diligent in preparing his teaching and constantly delivering lessons of extraordinary quality. This is also unmistakably apparent in the feedback from students. In 2021, he took over a group of 15 students as class teacher and lead them self-responsibly through our Curriculum and mentored their portfolio projects. Stefan has noteworthy strengths in Object-Oriented Programming, ETL with Apache Airflow, descriptive Statistics and Forecasting Time Series. He restructured our teaching materials for these topics and created new ones from scratch. Besides teaching, Stefan took a leading role in designing and implementing our data infrastructure and is implementing a dashboard for our BI-team using Python, PostgreSQL, Airflow, Docker and plotly/dash. Stefan Roth is an extremely reliable colleague and top performer in our company. He is a very clear communicator. Both colleagues and supervisors value his contributions that help to improve the company workflows and team culture. I can recommend Stefan warmly and wish him success for his future career."