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I will audit and optimize your data warehouse or lakehouse

Netherlands

I speak English, Ukrainian, Dutch, Chinese

Lead Data Engineer

I am a business-oriented Data Engineer specializing in the intersection of data-driven solutions and business analysis. I excel at bridging the gap between technical and business sides, ensuring that ...

About this Gig

Your pipeline fails overnight, two dashboards show different numbers, and nobody knows which table is the source of truth. I fix that, and build pipelines that don't break in the first place.

What I deliver:

ETL/ELT pipeline design and development (Python, SQL, PySpark)
Audits of pipelines, warehouses and lakehouses, with a written findings report and a prioritised fix list
Performance tuning: slow queries, expensive Spark jobs, runaway compute cost
Bug fixing on pipelines you inherited or that broke after a change
API development and multi-source integration
Clean, modelled data ready for Power BI, analytics and ML

Stack: Python, SQL, PySpark, Delta Lake, Microsoft Fabric, Databricks, Azure, Power BI and DAX, REST APIs, Git and CI/CD.

I've taken data platforms from scattered Excel files to versioned, multi-environment pipelines running in production. You get working code, documentation and a handover, not a black box only I can maintain.

Message me with your sources, your current stack and what's going wrong, and I'll tell you straight whether I can help and what it would take.