Marian is available for hire
Hire MarianMarian Paul
Verified Expert in Engineering
Data Migration Developer
Pezinok, Bratislava Region, Slovakia
Toptal member since June 18, 2020
Bio
Marian is a senior developer and designer of data migrations and back-end solutions. He has Oracle SQL and Microsoft SQL expert certifications. His focus lies in data analysis, consolidation and cleansing, processing large volumes of data, and database performance tuning.
Portfolio
Accenture Slovakia
Java, C#, Salesforce, Microsoft SQL Server, Oracle, ETL, SQL, Databases
Softec Slovakia
Java, Microsoft SQL Server, Oracle, SQL, Database Migration, Databases
Accenture Slovakia
Siebel, C, C++, Unix, Oracle, SQL, Databases
Experience
- SQL - 15 years
- Data Migration - 15 years
- Microsoft SQL Server - 12 years
- Oracle - 7 years
- C# - 7 years
- Java - 5 years
- Master Data Management (MDM) - 4 years
- Salesforce - 3 years
Availability
Full-time
Preferred Environment
Windows, Java, C#, Oracle PL/SQL, Oracle SQL, T-SQL (Transact-SQL), Microsoft SQL Server
The most amazing...
...project I've contributed to is a multi-national data migration into a centralized Salesforce CRM solution for a global power and automation company.
Work Experience
Data Migration and Back-end Programmer
2013 - PRESENT
Accenture Slovakia
- Migrated CRM data for The ABB Group, Switzerland, into one global Salesforce application, covering 67 countries, 1.6 million business accounts, and 20,000 Salesforce users. Utilized MS SQL, Oracle, Salesforce, and C# technologies.
- Performed a Salesforce data migration for global pharmaceutical company QIAGEN GmbH, transitioning a legacy global B2B CRM solution into Salesforce. Employed technologies like MS SQL, Salesforce, C#, and PowerShell.
- Customized a packaged rating and billing manager system by NetCracker (formerly known as Geneva or Infinys) for T-Mobile Poland, leading an international development team. Leveraged technologies, including Oracle Database, PL/SQL, SQL, Unix shells, and Java.
- Migrated data from six countries for Nestle into a centralized Salesforce CRM solution. Migrated data of 5 million German consumers into a centralized custom MDM solution. Cleansed and deduplicated data for customers. Used technologies such as MS SQL T-SQL, C#, MS SSIS, .NET, and Salesforce.
- Migrated data from 60 countries for TetraPak into a centralized Salesforce CRM solution. Technologies included MS SQL T-SQL, .NET, and Salesforce.
- Directed CRM data migration for NokianTyres Finland into a centralized Salesforce CRM solution. Utilized technologies such as MS SQL T-SQL, .NET, and Salesforce.
- Migrated CRM telco data for Sky Germany from Siebel into a centralized Salesforce CRM solution. Technologies included MS SQL T-SQL, .NET, Salesforce, Java, and Kafka.
- Led the migration of insurance data for Liberty South Africa from various sources into a centralized Salesforce CRM solution. Employed technologies like MS SQL T-SQL, .NET, and Salesforce.
Technologies: Java, C#, Salesforce, Microsoft SQL Server, Oracle, ETL, SQL, Databases
Data Migration and Back-end Programmer
2007 - 2013
Softec Slovakia
- Did configuration testing of the product catalog in Siebel CRM and Infinys billing system for T-Mobile Slovakia. Oracle PL/SQL.
- Designed, built, and executed data migration and consolidation of 79 district databases into one centralized database, a part of a large e-government program, for the Ministry of Labor, Social Affairs, and Family of the Slovak Republic. The migration covered 100 GB of data and 5M subjects in total. Tech: Oracle RAC 11g2, Oracle SQL, and PL/SQL.
- Built the back-end for a reference data management and master data management system and integration with core banking system for ING Bank N.V, Slovakia. Tech: MS SQL Server 2008.
- Designed and developed batch data imports and synchronization of customer data into the front-end system from a variety of subsystems, namely MIDAS, for Volksbank Czech Republic, Slovak Republic. Designed and built the back-end of a payment processing system. Integrated with MIDAS. Tech: Java, DB2, MySQL, AS400, AIX, MS SQL, Oracle PL/SQL, and integration with the Java front-end.
- Implemented data pumps (ETL) over the core policy system UNIUS in Oracle SQL for insurance company Allianz Slovakia. Did SQL performance tuning.
Technologies: Java, Microsoft SQL Server, Oracle, SQL, Database Migration, Databases
Back-end Programmer
2003 - 2007
Accenture Slovakia
- Deployed a new Siebel CRM and Geneva billing solution for a Bulgarian telecom. Led a team of developers, customized the Geneva billing system, and implemented interfaces. Tech: Oracle PL/SQL, C++, Unix shells, and VB.
- Led a team of data migration developers for a Slovak telecom company. Made Siebel CRM data migrations, customized the Geneva billing system, and implemented interfaces. Tech: Oracle PL/SQL, C++, Unix shells, VB, and Siebel AIM.
Technologies: Siebel, C, C++, Unix, Oracle, SQL, Databases
Windows Programmer
2002 - 2003
Microstep HDO Slovakia
- Built Windows CRM/ERP applications.
Technologies: C++, Oracle
Windows Programmer
2001 - 2002
Partnersoft Slovakia
- Built CRM/ERP applications for Windows.
Technologies: C++, Microsoft Access
Education
1997 - 2002
Engineer's Degree in Software Engineering
Faculty of Electrical and Informatics - Slovakia, Bratislava
Skills
Tools
Salesforce Dataloader, Microsoft Access, Convergys/Infynis/Geneva Billing System
Languages
SQL, C++, C, Java, C#, T-SQL (Transact-SQL)
Paradigms
ETL
Storage
Oracle PL/SQL, Databases, Oracle SQL, Siebel EIM, Master Data Management (MDM), Microsoft SQL Server, SQL Server Integration Services (SSIS), Database Migration
Platforms
Oracle, Salesforce, Windows, Unix
Frameworks
.NET
Other
Data Migration, Query Optimization, Performance Tuning, Siebel, Unix Shell Scripting, Data Quality Analysis
Collaboration That Works
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