bash — unbiased.pl ~ data-engineer
$ whoami
data_consultant // ex-MicroStrategy_Principal // freelance
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 :: Data Engineering Without Compromise ::
15+ years. Enterprise scale. Zero compromise.
Ex-MicroStrategy Principal Consultant. Petabyte-scale migrations. ETL architecture across Redshift, BigQuery, Snowflake & Databricks. Serving clients across e-commerce, finance, retail, pharma & entertainment.
_init_contact() view_case_studies()
//01 Services
Database & DWH Migrations
End-to-end migration of legacy data warehouses to modern cloud platforms. Petabyte-scale experience. Full BI consumer reconnection guaranteed.
RedshiftSnowflakeBigQueryTeradataOracle
ETL Pipeline Development
Design and build of robust, scalable pipelines from source to warehouse. Experience across SSIS, Airflow, PySpark, Informatica PowerCenter, and Databricks.
AirflowPySparkSSISDatabricksInformatica
MicroStrategy Integration
15+ years hands-on MicroStrategy expertise — Developer, Web, Mobile, Command Manager, Enterprise Manager. Redshift, Snowflake, BigQuery backend integration and optimisation.
MicroStrategymstrio.pyRedshiftSnowflakeBigQuery
DB Performance Optimisation
Deep-dive query tuning, indexing strategies, and architecture reviews. Delivered 10x read improvement on SQL Server. GDPR-compliant data quality pipelines.
SQL ServerPostgreSQLPresto/TrinoGDPR
Python & Data Engineering
Custom Python tooling, REST API integrations, statistical analysis pipelines, LDAP automation, and market basket analysis with PySpark on GCP Dataproc.
PythonPySparkREST APIScalaCI/CD
Data Model & DW Design
Warehouse schema design, ETL architecture blueprints, and analytics layer structuring for BI platforms. Delivered for media, pharma, FMCG, and grocery clients.
Star SchemaAnalyticsSQLData Vault
//02 Tech Stack
// Cloud Warehouses & Databases
Amazon Redshift
98%
Google BigQuery
92%
Snowflake
88%
SQL Server
90%
Teradata
82%
Oracle
80%
// BI, Pipelines & Code
MicroStrategy
99%
Python
90%
Apache Airflow
88%
Databricks / Spark
85%
SSIS / Informatica
85%
Presto / Trino
78%
//03 Case Studies
01
Migration // [EU E-COMMERCE GIANT] // 2024–2025
Legacy Analytical DWH → Amazon Redshift (Petabyte Scale)
Collaborated with a global SI and AWS to migrate a top-3 European e-commerce platform's entire analytical database to Redshift. Built custom tooling, rewrote legacy scripts, moved petabytes of data, and ensured seamless reconnection of all BI consumers including MicroStrategy.
Amazon RedshiftMicroStrategyPythonAWS
02
Optimisation // [US FINANCIAL SERVICES] // MicroStrategy
MicroStrategy + Redshift / Snowflake Optimisation & POC
Delivered in-depth optimisation recommendations for MicroStrategy on Redshift for a major US financial services firm. Followed by a cloud DWH POC comparing Redshift and Snowflake backends for a US entertainment & gaming client.
MicroStrategyRedshiftSnowflake
03
Analytics // [US HOME & LIFESTYLE RETAIL] // GCP
Market Basket Analysis Pipeline on GCP Dataproc
Built PySpark pipelines on Google BigQuery Dataproc for market basket analysis at a major US home furnishings retailer. Delivered production-scale retail analytics used directly by the merchandising team.
PySparkBigQueryGCP DataprocPython
04
ETL // [UK QUICK SERVICE RESTAURANT CHAIN] // GDPR
GDPR-compliant ETL & DW Optimisation
Designed and implemented full ETL (SSIS) and data warehouse optimisation for a major UK QSR brand, ensuring GDPR compliance and data quality between Amazon RDS and SQL Server.
SSISAmazon RDSSQL ServerGDPR
05
Pipelines // [EU E-COMMERCE GIANT] // Databricks
Python/SQL Pipelines & Statistical Analysis in Databricks
Built Python and SQL data engineering pipelines with statistical analysis workflows in Databricks and Airflow for the internal analytics team of a top European fashion platform.
DatabricksAirflowPythonSQL
06
Performance // [NORTH AMERICAN GROCERY CHAIN] // SQL
10x SQL Server Read Performance Improvement
Deep-dive SQL Server performance optimisation for a North American grocery retailer — delivering a 10x improvement in read throughput through indexing strategy overhaul and query restructuring across production workloads.
SQL ServerPerformanceQuery Tuning
//04 Contact 
  +-----------------------------+
  |                             |
  |   OPEN FOR NEW PROJECTS     |
  |                             |
  |   Response time: < 24h      |
  |   Location: Poland          |
  |   Timezone: CET / UTC+1     |
  |   Remote: YES               |
  |   On-site: negotiable       |
  |                             |
  +-----------------------------+

  // Currently accepting:
  [v] DWH / cloud migrations
  [v] MicroStrategy integration
  [v] ETL architecture & builds
  [v] Performance optimisation
  [ ] SCRUM ceremonies :)

// Drop a message. I'll get back within 24h.
No agencies. No recruiters. Direct clients only.