Worked on expanding DeFi Saver’s SDK capabilities by delivering multi-network market access and sub-account features. Updated the defisaver-positions-sdk repository to add Arbitrum and Base network market addresses, enabling the SDK to interact with new trading pairs and broadening its reach for decentralized finance strategies. Enhanced address management by introducing a CreateSub action address constant in defisaver-sdk, supporting new smart contract interactions for sub-account creation. Focused on TypeScript for implementation, with an emphasis on smart contract interaction and address mapping. These contributions streamlined developer onboarding, improved integration across networks, and increased the scalability of cross-network DeFi solutions.