Patryk Chlanda

01 · Where I've worked

Experience

Mar 2026 - now Kraków, PL
Data & Software Engineer · Unit8

Swiss data & AI consultancy
- Designing and building a medallion lakehouse (bronze to gold) on Azure Databricks with Unity Catalog, consolidating 4 source systems into one governed analytical layer.
- Automated releases of 20+ pipelines across three environments (dev → qua → prod) with GitHub Actions and Databricks Asset Bundles, gated by automated testing and validation.
- Built dbt models and orchestration jobs for timeseries analytics, plus live Databricks dashboards and Databricks Apps monitoring metrics and data quality for dozens of users.
- Sped up a critical timeseries pipeline from 15 minutes to 90 seconds (10x) by splitting one monolithic multi-CTE model into several incremental models, adding BROADCAST join hints and tuning partition_by/cluster_by.
- Shipped a RAG knowledge assistant with specialised agents reaching internal data sources over MCP, used by dozens of people and built to scale to hundreds of users company-wide.
Databricks dbt Terraform GitHub Actions Azure OpenAI MCP
Sep 2023 - Mar 2026 Paris, FR
Data Engineer · Artefact

Global data & AI consultancy
- Designed and ran a subscription data product serving 40+ enterprise clients and 500+ active users, on Azure infrastructure provisioned with Terraform.
- Built ETL/ELT pipelines with Airflow and dbt processing millions of records a day, plus Kafka streaming for events that needed live processing.
- Automated ingestion from 50+ APIs and databases (+70% collection efficiency) and a data-quality framework that cut incidents by 90%.
- Integrated OpenAI-powered NLP features, with Langfuse for LLM observability and evals.
- Raised the engineering bar through PR reviews, git hooks and CI-enforced testing, optimising for cost, scalability and security.
Airflow dbt Kafka Azure BigQuery LangChain
Apr - Sep 2023 Paris, FR
Data Engineer Intern · Datadog

Cloud observability platform
- Built and optimised distributed, high-volume ETL pipelines with Spark (Scala) and Python (Luigi) on the Internal Analytics Core Data team.
- Modelled and stored large datasets across AWS, GCP and Azure, with Snowflake and Kubernetes.
Spark Scala Luigi Snowflake Kubernetes
2018 - 2023 Paris, FR
Full-stack Engineer · Freelance
- Built websites and web apps end-to-end for clients: Angular and Django fronts, Node and Python backends, custom APIs with Express and FastAPI.
- Ran serverless infrastructure on AWS and GCP and owned delivery directly with clients.
Angular Django Node.js FastAPI AWS
Sep 2021 - Jul 2022 Aix-en-Provence, FR
Data Science & Software Intern · Agrove

Urban-farming startup
- Trained and benchmarked AI models for urban-farming yield optimisation, reaching 92% top-1 accuracy in the mobile app.
- Built the FastAPI backend and React front of a plant-health scoring system, logging to PostgreSQL.
TensorFlow FastAPI React PostgreSQL

02 · What I work with

Skills

Data platforms

Databricks Delta Lake Unity Catalog dbt Airflow Spark Kafka Snowflake BigQuery PostgreSQL

Cloud & DevOps

Azure GCP AWS Terraform Docker Kubernetes GitHub Actions

AI & LLMs

RAG & multi-agent systems MCP OpenAI API Claude & Anthropic API LangChain Langfuse & LLM evals Vector search & embeddings TensorFlow

Languages & web

Python SQL Scala TypeScript Swift Bash FastAPI Django React Angular

03 · Things I've built

Projects

AppAudioController

A macOS menu-bar app for per-app volume, 10-band EQ and audio routing, built entirely on public CoreAudio process-tap APIs. No kernel extensions, no private SPI.

Swift · macOS 14+