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# Daniel Branski
Platform engineer modernizing mission-critical banking systems from legacy mainframe to Java.

## About

Daniel Branski modernizes massive legacy systems without breaking daily operations. At Finanz Informatik, he builds the data and intelligence platform that powers banking for over 50 million customers across the German Sparkasse Finance Group.

He recently guided the shift of a central data warehouse off mainframes and onto a decentralized architecture. Rather than just rewriting old code, Daniel focuses on extracting actual business value from legacy COBOL and translating it into modular Java services. His work combines broad system design with strict query optimization, making heavy banking infrastructure easier for developers to maintain.



## Past Sessions

### World Congress 2026 Europe · July 8, 2026
Berlin, Germany
- [From COBOL to Java: How Developers Transition 60 Years of Legacy into Modern Java Services](https://www.wearedevelopers.com/events/world-congress-2026-europe/sessions/943-from-cobol-to-java) · 120 min