Worked on the rainbow-me/rainbow repository to enhance the accuracy of wallet position balances by addressing double-counting issues with liquid staking tokens. Focused on excluding rETH from wallet balances to prevent overlap with stETH and wstETH, updating the token filtering configuration and expanding both unit and integration test coverage. Utilized TypeScript and applied front end as well as full stack development skills to ensure all 166 positions tests passed, validating correctness across multiple LSDs. This work improved the reliability of displayed balances, reduced user confusion, and strengthened trust in the app’s reporting by ensuring positions accurately reflect true holdings.