problem-solver, scientist, engineer, PhD

Experienced research engineer and data scientist with a strong background in air quality modeling, machine learning, and cloud infrastructure. Proven ability to develop and implement innovative solutions to complex problems. Passionate about using technology to make a positive impact on the environment and society.

• Programming Languages: Python, C++, Go, SQL, embedded platforms STM32, Qualcomm AI Hub
• Cloud Platforms: AWS (Certified Solutions Architect & Developer), GCP, Oracle Cloud
• Machine Learning: Time-series forecasting, Large Language Models (LLMs), Retrieval Augmented Generation (RAG), Weather forecasting (WRF, WRF-Chem), CAMS and GFS models
• Data Engineering: Apache Airflow, Clickhouse, Databricks, Snowflake, BigQuery, Dagster
• DevOps: Terraform, Github Workflow, GitLab pipelines, CI/CD

• PhD in Computer Science | KU Leuven | 2013-2018 (Leuven, Belgium)
• M.Sc. in Physics, Nanotechnology | Adam Mickiewicz University | 2008-2012 (Poznan, Poland)
• B.Eng. in Computer Science | Poznan University of Technology | 2005-2009 (Poznan, Poland)

📫 jkrajniak@gmail.com | medium.com | dev.to | Google Scholar