I am Lukáš Kozelnický, a ClickHouse and analytics infrastructure expert specializing in helping business use their data potential to make data-driven decisions.
I help companies build real-time analytics platforms with ClickHouse. Most teams come to me when pipelines start failing, dashboards become slow, or infrastructure costs grow faster than the business. I also work with businesses struggling to manage growing amounts of data scattered across multiple systems. They are often overwhelmed trying to extract reliable insights from inconsistent information while aligning their data strategy with business growth.
My work covers full analytics lifecycle — ingestion pipelines, Clickhouse data warehouse, query optimization, operational scaling and ongoing support. What sets me apart is my focus on creating long-term, future-proof systems that grow with the business, enabling teams to scale without technical bottlenecks.
With years of experience in the tech industry and proven results across multiple sectors, I’ve helped companies streamline operations, reduce reporting time, and confidently adopt data-driven strategies. My work is built on trusted, battle-tested technologies that ensure both reliability and flexibility.
My tech stack includes Clickhouse, Python, SQL, Kafka, AWS, Airflow.
I provide tailored Clickhouse and data engineering services to help organizations transform raw data into actionable insights. Whether you’re starting with a new data warehouse, optimizing ETL pipelines, or scaling to handle enterprise growth, I bring the tools and expertise to deliver lasting results. If you’re ready to make your data work harder for your business, let’s connect.