Description

Senior Data Architect with 20+ years of experience designing enterprise DWH, cloud data and analytical platforms across banking, insurance, telecom, energy and retail sectors. Expert in dimensional modelling, ETL/ELT architecture, SQL performance tuning and large-scale data migration. Proven technical leader with experience mentoring teams, stabilising business-critical reporting, building greenfield data platforms and supporting enterprise modernization initiatives across Azure, AWS and Cloudera environments.

Industry field of expertise

Languages

Hungarian
Native or bilingual
English
Fluent
German
Basic

Workplace preferences

Can work on-site

Budapest (up to 10km)

ERGO
Data Architect
BANKING AND INSURANCE
June 2025 - Today (1 year and 2 months)
Budapest, Hungary
• Provide technical leadership within a 5-person DWH team maintaining an insurance Data Warehouse for claims, policy, finance and management reporting.
• Maintain and extend dimensional models and reporting structures supporting downstream Power BI, SSRS and SSAS consumption.
• Stabilise business-critical finance and IFRS reporting by resolving recurring data quality, transformation logic and SQL/SSIS processing issues.
• Helped improve quarterly IFRS report quality from approximately 60% to around 98% across PRE and ACT reporting cycles.
• Troubleshoot and optimise complex T-SQL stored procedures, SSIS packages and SQL Server data flows.
Technologies: SQL Server, T-SQL, SSIS, SSRS, SSAS, SSMS, Power BI
ETL DWH SQL Server SSIS Microsoft Power BI
Bluebird
SQL Domain Expert / AI Model Trainer
December 2023 - June 2025 (1 year and 6 months)
Budapest, Hungary
• Applied deep SQL and database expertise to train and evaluate large language models on complex database reasoning tasks.
• Designed advanced SQL training and evaluation scenarios covering correctness, optimisation, execution plans, indexing, data modelling and cross-database behaviour.
• Evaluated and corrected AI-generated SQL across Oracle, PostgreSQL, SQL Server, MySQL, BigQuery, Hive and SQLite using synthetic enterprise-style datasets.
• Served as reviewer and senior reviewer, ensuring task quality, evaluation consistency and high standards across SQL-focused model training workflows. Technologies: Oracle, PostgreSQL, SQL Server, MySQL, BigQuery, Hive, SQLite
PostgreSQL Oracle SQL Server MySQL BigQuery
K&H Bank
Big Data Architect / Team Lead
January 2022 - March 2023 (1 year and 2 months)
Budapest, Hungary
• Technically led a 3-person team developing a near-real-time banking messaging platform for push, SMS, email, system and campaign communications.
• Established code review, logging, clean code and maintainability standards across Oracle, Python and Airflow components.
• Reused legacy Oracle stored procedures and Python logic while introducing Airflow-based orchestration for future cloud alignment.
• Supported hybrid architecture planning, connecting on-premise Oracle/DWH capabilities with longer-term cloud platform direction.
Technologies: Oracle, PL/SQL, Python, Apache Airflow, Hadoop
Data Lake Oracle Python Airflow PL/SQL