Mariusz Gromada
Chief Of Retail Customers & Omnichannel at Bank Millennium
Warsaw, Masovian Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolMariusz Gromada is a data-driven banking executive with 10+ years shaping CRM, data science and customer intelligence at Bank Millennium, now leading the Retail Customers & Omnichannel area as Head of Customer Intelligence. He combines rigorous mathematical training (MSc from Warsaw University of Technology) and postgraduate statistical methods with hands-on experience building analytics and predictive platforms across telecom and banking. His career traces a steady progression from revenue assurance and BI to architecting enterprise-scale data science teams and CRM strategies that drive omnichannel customer engagement. An active contributor to open-source tooling, he has made practical code improvements to the mXparser math parser—fixing charset issues, constants and constructors—reflecting attention to numerical correctness and engineering detail. Known for translating complex statistical methods into operational business solutions, he blends technical depth with executive leadership to turn data into measurable customer outcomes.
10 years of coding experience
1 year of employment as a software developer
Master, Mathematics, Faculty of Mathematics and Information Science, Master, Mathematics, Faculty of Mathematics and Information Science at Warsaw University of TechnologyPostgraduate, Statistical methods in bussiness applications, Faculty of Economic Sciences, Postgraduate, Statistical methods in bussiness applications, Faculty of Economic Sciences at University of Warsaw
English, Polish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (7)
code-library10
lib10
csharp10
dotnet-core10
unicode10
text-manipulation9
netframework8
Programming languages (4)
Github contributions (5)
mariuszgromada/MathParser.org-mXparser
Dec 2015 - Jan 2023
Math Parser: Java, C#, C++, Kotlin, Android, and all .NET platforms (Nuget, Maven, CMake). Supports .NET Framework, .NET Core, .NET Standard, Xamarin, and more. Features: rich built-in library of math functions, operators, constants. Flexible in user-defined arguments, functions. Expressions provided as plain text. Easy to use. Well documented.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:29 releases, 1 review, 678 commits in 7 years 2 months
Contributions summary:Mariusz was involved in converting source code from cp1250 to UTF-8 across the project, updating the `mXparser.csproj` file, and making corrections to constant values, including specific constants like Ramanujan-Soldner and Erdős-Borwein. They also introduced new constructors, contributing to the development and maintenance of the mXparser library, as well as fixing a problem related to blank spaces.
androidcmakecppcsharpdotnet
mariuszgromada/Janet-Sudoku
Feb 2016 - Apr 2017
Contributions:3 releases, 62 commits, 59 pushes in 1 year 2 months
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