Ondrej contributed to the flipperdevices/flipperzero-firmware repository by expanding the NFC key dictionary, focusing on enhancing interoperability across devices and applications. He replaced the existing mf_classic_dict.nfc file with a Proxmark3-derived dataset, broadening the range of supported NFC keys and improving data management within the firmware. This work leveraged his expertise in NFC protocols and data integration, ensuring that the firmware could recognize a more diverse set of keys from multiple sources. Although the contribution was feature-driven and limited to a single month, it laid a solid foundation for future NFC enhancements and demonstrated depth in firmware-level data management.