Maciej Jarka
Verified Expert in Engineering
Data Engineer and Developer
Maciej is an ETL, BI, and big data engineer who's eager to share his knowledge and experience. He has over a decade of international experience under his belt, gained in projects spanning from data integration to analytics while working for industry leaders such as ING (banking) and Roche (pharma). Maciej is also quite handy with several tools including Snowflake, Netezza, Informatica, and DataStage (he’s a certified IBM DataStage trainer).
Portfolio
Experience
Availability
Preferred Environment
SQL Server Analysis Services (SSAS), Eclipse, Git, Linux
The most amazing...
...solution I've worked on was a JDBC driver allowing you to transform your relational data into RDF graph; see more at Powerdf.com
Work Experience
Cloud Data Warehouse Architect
Fortune 100 North American Construction Equipment Manufacturer(Toptal Client)
- Built foundations of enterprise data lake architecture.
- Designed and developed data pipeline patterns to be used across the enterprise.
- Trained business and engineering teams to use the product.
Senior Data Engineer
SeaChange
- Designed data pipelines for processing large VOD metadata datasets in Snowflake and Talend.
- Created data warehouse structures to support advanced analytics.
- Prepared and masked large data sets for machine-learning activities.
Senior Data Engineer | Team Leader | Trainer
ING (Belgium)
- Built ETL solutions for the bank's marketing department.
- Optimized data structures in IBM Pure Data for Analytics.
- Trained team members in the scope of IBM DataStage.
- Designed data structures in star schema to meet reporting requirements.
Senior BI Developer
RobertHalf (US)
- Built management reports in SAP Business Objects.
- Designed SAP BO universes.
- Optimized Oracle data warehouse for reporting.
Senior ETL Developer
Roche Pharmaceuticals
- Developed ETL solutions for large market data sets.
- Optimized Teradata database structures for reporting.
- Gathered requirements from the data science team.
- Built a database to graph solutions with Talend and SPARQL.
Senior ETL Developer
Ascen
- Developed ETL processes with IBM DataStage and Microsoft Integration Services.
- Generated reports in SAP BusinessObjects for LOT Polish Airlines.
- Created analytical cubes with Microsoft Analysis Services for LOT Polish Airlines.
Data Integration Developer
Roche Pharmaceuticals
- Integrated enterprise data sources such as Oracle, Salesforce, and LDAP.
- Built ETL and data virtualization solutions.
Master Data Management (MDM) Developer
ValueTank
- Designed a data model for a master data management solution.
- Developed Java software components embedded in IBM MDM platform.
- Collected a client's requirements related to change requests.
Software Developer
Comarch
- Developed an advanced data mining and integration platform called ADMIRE (Admire-project.eu).
- Built data-mining models for churn prediction and cross-selling.
- Constructed Java-based components for the platform.
Experience
PoweRDF
Trend Catcher for Twitter
The DATA Bonanza (Book)
Skills
Languages
Snowflake, SQL, Java, SPARQL, RDF, XSLT, Python 3
Tools
IBM InfoSphere (DataStage), Talend ETL, Informatica PowerCenter, IBM Tivoli Workload Scheduler, Amazon Athena, AWS Glue, Git, Weka, Tableau, Boto 3, SnapLogic
Paradigms
ETL, Kimball Methodology, Management
Storage
Databases, Data Pipelines, Netezza, Master Data Management (MDM), PL/SQL, Azure Blobs, Amazon S3 (AWS S3), PostgreSQL, Oracle RDBMS, Datastage, SQL Server Analysis Services (SSAS), Data Lakes, Teradata
Other
Data Warehousing, Data Architecture, Data Warehouse Design, Data Modeling, SAP BusinessObjects (BO), Web Services, Amazon Kinesis, SAP BusinessObjects Data Service (BODS), Data Mining, Amazon Kinesis Data Firehose
Libraries/APIs
Azure Blob Storage API, Pandas
Platforms
Linux, AWS Lambda, Eclipse, JBoss, Talend, Oracle, Amazon Web Services (AWS), Docker
Frameworks
Windows PowerShell
Education
Master of Science (MSc) Degree in Computer Science
Warsaw University of Technology - Warsaw, Poland
Engineer's Degree in Computer Science
Warsaw University of Technology - Warsaw, Poland
Certifications
SnowPro Advanced Architect
Snowflake (Udemy)
SnowPro Core
Snowflake
C2090-424-EN InfoSphere DataStage v11.3
IBM
00-N50 IBM PureData System for Analytics (Netezza) Technical Mastery
IBM
000-M78 — IBM Initiate Master Data Service Technical Mastery
IBM
P2090-086 IBM InfoSphere Master Data Management — PIM Technical Mastery
IBM
1Z0-851 — Oracle Certified Programmer for the Java 2 Platform, SE 6.0
Oracle
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