Marian is available for hire

Marian Paul

Verified Expert in Engineering

Data Migration Developer

Location

Pezinok, Bratislava Region, Slovakia

Toptal Member Since

June 18, 2020

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.

Data Migration SQL ETL Databases Oracle PL/SQL Salesforce Dataloader Oracle C++Windows Microsoft SQL Server T-SQL (Transact-SQL)C#.NET Oracle SQL Java Siebel

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

Experience

Publication

10 Tips for Effective Legacy Data Migration

https://www.toptal.com/salesforce/how-to-successfully-migrate-legacy-data

Skillset

Languages

SQL, C++, C, Java, C#, T-SQL (Transact-SQL)

Tools

Salesforce Dataloader, Microsoft Access, Convergys/Infynis/Geneva Billing System

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

Other

Data Migration, Query Optimization, Performance Tuning, Siebel, Unix Shell Scripting, Data Quality Analysis

Platforms

Oracle, Salesforce, Windows, Unix

Frameworks

.NET

Education

1997 - 2002

Engineer's Degree in Software Engineering

Faculty of Electrical and Informatics - Slovakia, Bratislava

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