Zsolt Váradi

I work as a Senior Data Architect & Data Analyst Engineer at Samegrid. In this innovative iGaming startup, I lead and develop a next-generation cloud-based DWH solution for the iGaming area.

Technologies used: Apache Flink, Snowflake, AWS S3, DBT.

Key responsibilities:

• Designing and implementing a modern Data Warehouse (DWH) architecture.
• Developing a scalable, centralized, and high-performance cloud-based data solution.
• Establish data flow management and optimize data processing pipelines.
• Defining data quality management and governance frameworks.
• Implementing an MVP solution that ensures flexibility and speed in data handling.

Key areas of expertise: Data Management, Data Quality Management, Data Warehouse, Data Flow Management, Business Intelligence.

With a focus on scalability, efficiency, and data-driven decision-making, my work contributes to improving data management practices in the iGaming sector, helping businesses make better use of their data.

Projects: NEOS project in NEOM

Technologies, tools: Apache Kafka/Spark, MySQL, Iceberg, PostgreSQL, Python, DBeaver, PowerBI, Apache Superset, DBSchema, DBT, SAP

Main tasks: Definition of the data model principles, Data modelling, Data Mapping, Mock Data generation, Database architecture design, Database development, Data Product design/development, Development of the data processes and Data Flow Management, Master Data Management, Metadata Management, Pipeline design, development and parametrization in NEOS and source systems area (as a Data Mesh solution). Data analysis, reports and dashboard development (in Power BI, Apache Superset), data pipeline and NEOS tool testing. 

Project: Quality finished product release project

Technologies, tools: GCP - BigQuery, Talend

Main tasks: Data Analysis, Data modelling, Data Mapping, Database architecture design, Database development, Development of the data processes and Data Flow Management, Master Data Management, Metadata Management, Testing.

Projects: Vodafone Hungary: Legacy DWH, ODS, Tactical reporting, Nucleus GCP DWH

I have worked on several projects where my tasks' key factors were data handling, data manipulation, and architecture design.

Technologies, tools: DMaaP, CDAP, ORACLE, ODI, Hadoop, Hive, Yarn, GCP, Bigquery, QlickView

Main tasks: Data Analysis, Data Modelling, Mapping, Database architecture design, Data Flow design, Master Data Management, Metadata Management and development of data processes, Data Flow Management, discovery of error causes in data streams, reverse engineering of data movement source codes in DWH and system integration area.

Projects: Hungarian Nuclear Plant - BI

Technologies: ORACLE, PLSQL, OBIEE

Main tasks:

• reporting, data analysis and data visualization in Oracle BI (OBIEE);
• management decision support in the Data Governance and BI area;
• Data Flow design, Master Data Management, Metadata Management;
• the planning of the data migration process (ETL/ELT) and technical area;
• the development of SQL and PLSQL solutions in the BI reporting tools and ETL processes.

I have worked on several projects as a contractor, where I was responsible for collecting complex business requirements and designing, developing, or supporting construction.

Professional Position:

• Senior DQM, ETL/Data Migration, BI, DB, Data Analysis and Error Handling Expert, SQL/PLSQL Developer and PM (2011-)

Main tasks:

• Design and development of DQM, Data Cleansing, ETL/ELT and Data Migration tasks
• Support of the DWH, Reporting and BI tasks
• Data Analysis, Analysis of the source environment
• Support of the data integration processes and environments
• Master Data Management, Metadata Management, Data Governance
• Team and project management

Main Projects:

• T-Systems - implementation of the Asset Handling System as DQM/ETL expert, SQL/PLSQL Developer, Data Analyst and Scrum Master (Oracle, MS SQL, Talend, Oracle DWH, Jira)
• Telekom Hungary (General Contractor: HPE) - AD/AM Projects as Business Analyst (Scrum Team Member, Product Owner) (Testing, Reporting, System design)
• Vodafone Hungary (General Contractor: HPE) - AD/AM Projects as Business Analyst, BI expert (Scrum Team Member) (BI/BO, Testing, Reporting, System design)
• Vodafone Hungary - implementation of SalesForce.com as DQM, ETL expert, SQL/PLSQL Developer and Data Analyst (Oracle, Reporting)
• Vodafone Hungary - implementation of the Siebel CRM system as DQM, ETL and Data Analysis expert, SQL/PLSQL Developer (Oracle, DWH, Reporting, Jira)

Participated in several DQM, migration, DWH/BI and system implementation projects through the full project lifecycle. Responsible for professionally managing a DQM expert and development team, developing a data cleansing methodology, and managing customer relations.

Professional Position:

• Professional Leader (DQM), Team Leader (DQM), Project Manager, Senior DQM and Migration Expert, SQL/PLSQL Developer, DB Developer, DQM Presales Manager (2004-2011)
• Senior DQM Expert, DB and Business Analyst, PM, SQL/PLSQL Developer, Presales Expert (2002-2004)
• DQM Expert, PM (2001-2002)

Main tasks:

• Design and development of DQM, Data Cleansing, ETL/ELT and Data Migration tasks
• Support of the DWH, Reporting and BI tasks
• Data Analysis, Analysis of the source environment
• Support of the data integration processes and environments
• Master Data Management, Metadata Management, Data Governance
• Team and project management

Main Projects

• OTP Bank - Consolidation of Bank customers (DQM) as PM, Business Analyst, SQL/PLSQL Developer (Oracle, Reporting, DWH, System and DB design)
• Telenor - DQM projects as PM, DQM Expert, SQL/PLSQL Developer (Oracle, Reporting, System and DB design)
• INVITEL - DQM, ETL and Building of Business Data Bank DB projects as PM, DQM and ETL Expert, Business Analyst, SQL/PLSQL Developer. (Oracle, Erwin, DWH, Reporting, DB design)

I started as a bank clerk and in a short time I was promoted to team leader and later to branch office manager. I continued my work in the Bank Center where I first met the Data Quality Management (DQM) and became subproject manager.

Professional Position:

• DQM subproject manager (PM), Team leader (2000-2001)
• Business Process Manager, Business Analyst (1999)
• Branch office manager (1998)
• Branch office deputy manager, team leader (1998)
• Bank clerks (1997)

Main Projects:

• K&H Bank - Data Cleansing Subproject as part of the new account management system implementation project (Equation) as PM, Business Analyst (Oracle, Reporting, System design)

• 23+ years of experience in the IT/Telecom/Financial industry
• Extensive practical experience and confident knowledge in DQM, ETL/ELT, data analysis, database development, data transformation, system integration on the data level, error handling, reporting, DWH/BI, application development, testing
• SQL/PLSQL development and Oracle, MSSQL, PostgreSQL  knowledge
• Business analyst knowledge, experience (CRM, Billing system, ERP systems)
• Analytical thinking, data scientist skills;
• Project management knowledge, experience in DQM, IT development, integration, ETL projects 
• Experience in Agile Methodology