Lukas Michalicka-Data Engineer / DWH & ETL Consultant
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Experience
Data Engineer / DWH Developer
Twinformatics (Vienna Insurance Group)
Developed and operated enterprise DWH and ETL solutions for insurance clients, focusing on data quality, traceability, stability and long-term maintainability.
Built and maintained production-critical T-SQL scripts and ETL pipelines in Microsoft SQL Server / DWH environments.
Contributed to IFRS17-related data flows and reporting processes in a regulated insurance environment.
Acted as an interface between business stakeholders and development teams, supporting requirement clarification, coordination and delivery alignment.
Supported data quality checks, operational monitoring, incident analysis and issue resolution for business-critical DWH processes.
Handled release management through Git-based workflows, including preparation, coordination and deployment support.
Performed database operations such as backup/restore activities, environment support and technical documentation.
Contributed to data integration processes using Databricks and Python, including file processing and loading data into database systems.
Data & ETL: T-SQL, Microsoft SQL Server, Google BigQuery · Pentaho Data Integration (Kettle), Databricks (PySpark, Spark DataFrames), Apache Spark
Engineering & delivery: Python, Bash, Azure, AI-driven automation, basic C# · Git, SourceFree, release management, backup/restore, documentation
Domain & practices: Insurance, IFRS 17, data quality, testing, incident and production support
IT Consultant / DWH & ETL Developer
Adastra
Participated in DWH takeover and later operational responsibility for a banking client environment.
Developed and maintained Oracle-based DWH and ETL processes using Oracle SQL and related ETL tooling.
Provided DWH testing, production support, release management and documentation for client-facing delivery.
Supported 24/7 on-call duty, incident handling and root-cause analysis in a production banking context.
Data & ETL: Oracle SQL, Oracle Database · Oracle Data Integrator (ODI), Oracle Warehouse Builder (OWB)
Engineering & delivery: Bash, Azure, basic C++ · Git, SVN, release management, backup/restore, documentation
Domain & practices: Banking, DWH takeover, testing, incident handling and 24/7 production support
Industry experience
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Experienced in Banking and Finance and Insurance.
Business area experience
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Experienced in Business Intelligence, Information Technology, Operations, Quality Assurance, and Finance.
Summary
Data Engineer / DWH & ETL Consultant with 5+ years of experience delivering and operating business-critical data warehouse and ETL solutions in banking and insurance environments. Strong background in SQL, Oracle, Microsoft SQL Server, Pentaho Data Integration, ODI, production support, release management, data quality and incident handling. Experienced in regulated enterprise environments where traceability, reliability and long-term maintainability are essential. Building further expertise in Databricks, Apache Spark, Azure data platforms, Python and AI-driven automation.
Skills
- Dwh & Etl Development
- Sql
- Data Modelling
- Data Quality
- Production Support
- Release Management
- Requirements Analysis
- Banking & Insurance
Languages
Education
University of Economics in Bratislava
Information Management · Bratislava, Slovakia
University of Economics in Bratislava
Economic Informatics · Bratislava, Slovakia
RWTH Aachen University
Erasmus+ · Business Administration & IT · Aachen, Germany
Certifications & licenses
Databricks Academy Accreditation - Data Governance Fundamentals
Databricks Academy Accreditation - Databricks Fundamentals
Microsoft Certified: Azure Data Fundamentals (DP-900)
Microsoft Certified: Azure Fundamentals (AZ-900)
Python and Databricks Training
Udemy
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
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Calculated based on our freelancers’ daily rates as of 21 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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