Aritra Chatterjee focused on backend and blockchain development, delivering two features across the privacy-scaling-explorations/maci and celestiaorg/celestia-app repositories. He refactored network configuration handling by centralizing network-related constants and definitions, replacing scattered hardcoded values with reusable enums and constants. Using TypeScript and Go, Aritra standardized network handling in maci by introducing an exportable ESupportedChains enum, improving maintainability and reducing misconfiguration risk. In celestia-app, he replaced hardcoded chain IDs with centralized constants, ensuring consistency across genesis and test flows. His work emphasized code maintainability, refactoring, and robust constants management, laying a foundation for more reliable network feature development.