Marcin Suszczyński
Verified Expert in Engineering
Data Warehouse Developer
Marcin is an IT professional with 15+ years of experience in multinational work environments across different industries, using Agile and Waterfall methods. He specializes in data integration, utilizing market-leading ETL tools and open source and custom solutions. Skilled in very large data warehouse environments based on Kimball and Data Vault 2.0 methodology, Marcin has also worked in data integration projects, including semantic web data models.
Portfolio
Experience
Availability
Preferred Environment
Informatica PowerCenter, Python, Netezza, SQL, Data Engineering, Snowflake, Data Build Tool (dbt), Azure, Amazon Web Services (AWS), Google Cloud Platform (GCP)
The most amazing...
...project where I’ve played a central role in creating an AI chatbot that enhances communication and productivity for MS Teams users for one of my clients.
Work Experience
Senior Data Engineer
IT house specialized in financial sector
- Played a central role in creating an intelligent chatbot that seamlessly interacts with Teams channels. It was an app written in Python using FastAPI hosted as a standalone web app in Azure App Service.
- Employed the infrastructure as code (IaC) approach to manage our Azure resources efficiently. Our IaC templates were automatically deployed and maintained through Azure DevOps pipelines, streamlining the process from development to production.
- Integrated Langchain into the chatbot, significantly improving natural language understanding and communication capabilities. This enhancement allowed for more context-aware and accurate responses to user queries.
- Utilized the Azure bot framework SDK to integrate conversational AI capabilities into Teams channels seamlessly. Developed chatbot features, including natural language understanding, user interactions, and context-aware responses.
Azure Data Engineer
US Digital Marketing Company
- Assisted the client in evaluating and replacing their existing data pipelines built using a typical Data Science stack in Python hosted on Azure MLOps.
- Developed a working proof-of-concept solution with a central component, a data pipeline using the DBT, orchestrated through Apache Airflow.
- Collaborated with the client's team to ensure a seamless transition and improved data processing efficiency.
Senior ETL & DWH Engineer
Self-employed
- Created a PowerShell tool for automatically generating ETL mappings and workflows for Informatica PowerCenter.
- Converted ETL mappings and workflows to seamlessly transition from Microsoft SQL Server to Netezza technology for 50+ Scandinavian banks.
- Developed a Python tool to speed up the data reconciliation process between complex Microsoft SQL Server and Netezza views.
- Architected ETL pipelines in Azure Data Factory, loading data from different types of source systems (files, Azure SQL databases, Azure Synapse).
- Developed Azure Databricks notebooks using SQL and Python, loading data from Parquet files, enriching them, and storing them in Delta Lake.
Senior ETL Developer
First Data
- Created new ETL processes using Oracle Data Integrator.
- Introduced a Git workflow with the usage of the Flyway tool to improve release to the production process.
- Trained team members on Git and Flyway and how to leverage that for increased productivity.
Senior ETL Developer and Data Modeler
IT Kontrakt
- Contributed to a data warehouse project for the pharmaceutical industry. Contributed to the signal medical data integration (ETL) from cloud sources (Salesforce) and data mining DB (Oracle Empirica) to a unified data warehouse. Authored the data model and ETL architecture.
- Integrated multiple relational systems with a triplestore, purpose-built database for an integrated document management system. Served as an RDF model contributor and ETL developer.
- Created the web application for tracking different KPIs in a pharmaceutical company. Authored a data model and worked as a database developer.
ETL Specialist and Data Modeler
Ascen
- Completed real-time integration of flight and passengers data including data load and transformations from complex XML sources to a common multi-dimensional model I was an author of.
- Developed custom C# transformations for better performance of Microsoft SSIS pipelines.
- Integrated booking data to common multi-dimensional booking model I was an author of.
- Created an SAP BO Data Foundation and Business layer for reporting of passengers and flights data.
- Contributed to a data integration project for aviation market Integration of data from multiple operational sources (relational, XML, WebServices, IATA TTY) to a single central operational database to support the flight planning management system.
ETL Specialist
Hewlett Packard
- Served as a part of 3rd line support team I was responsible for supporting an Enterprise Data Warehouse for the large customer, one of the world FMCG leaders.
- Resolved incidents in daily batch processing for the data warehouse.
- Optimized performance of long running queries.
- Completed code reviews of new projects coming to the platform.
- Extended a platform with new ETL processes.
- Trained new team members, for near- and offshore locations.
Junior ETL Specialist
Hewlett Packard
- Supported an enterprise data warehouse for the large customer, one of the world FMCG leaders.
- Analyzed data flows, found potential data quality issues, and recommended solutions for fixing them.
- Managed knowledge transfer to the offshore location.
Experience
USOS BIRT Connector
Education
Master of Science Degree in Informatics
University of Warsaw - Warsaw, Poland
Bachelor of Science Degree in Computer Science
Adam Mickiewicz University - Poznan, Poland
Certifications
Microsoft Certified: Azure Fundamentals
Microsoft
Data Vault 2.0
Data Vault Alliance
Oracle Database 11g Administrator Certified Professional (OCP)
Oracle
Oracle Advanced PL/SQL Developer Certified Professional (OCP)
Oracle
Oracle Application Express Developer Certified Expert (OCE)
Oracle
Oracle Database SQL Certified Expert (OCE)
Oracle
ITIL V3 Foundation
ITIL Certified
Skills
Libraries/APIs
Pandas
Tools
Informatica PowerCenter, Informatica ETL, Git, Oracle SQL Data Modeler, Control-M, Oracle Application Express (APEX), Flyway, Apache Airflow, Azure App Service
Languages
SQL, Bash Script, Stored Procedure, XML, Python, Bash, C#, Java, Snowflake, C++
Platforms
Oracle, Linux, Oracle Data Integrator (ODI), Azure Synapse, Azure, Unix, Talend, Databricks, Amazon Web Services (AWS), Google Cloud Platform (GCP), Azure Functions, BIRT
Paradigms
Database Design, Business Intelligence (BI), ETL, Kimball Methodology, Scrum
Storage
Netezza, Oracle RDBMS, SQL Server Integration Services (SSIS), PL/SQL, Database Modeling, Databases, Data Pipelines, PostgreSQL, Microsoft SQL Server, DBeaver, Azure SQL, Azure SQL Databases
Frameworks
Windows PowerShell, Azure Bot Framework
Other
Data Warehousing, Data Warehouse Design, Data Engineering, User-defined Functions (UDF), Data Architecture, Data Modeling, Oracle Performance Tuning, Fintech, FMCG, Azure Data Factory, Data Vaults, Microsoft Azure, SAP BusinessObjects Data Service (BODS), Azure Databricks, APIs, Data Build Tool (dbt), Machine Learning Operations (MLOps), OpenAI, FastAPI, Infrastructure as Code (IaC), LangChain, DLL
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