Worked on the tonkeeper-web repository to enhance the reliability of address validation by implementing a retry mechanism for the TON API, specifically targeting rate limit errors that could cause transient failures. This solution involved integrating robust error handling and API integration techniques using TypeScript, ensuring that address lookups would automatically retry when encountering temporary API issues. Additionally, updated the project documentation to accurately reflect the correct build output directory, streamlining the onboarding process for new developers and improving build reproducibility. The work focused on backend reliability and developer experience, leveraging TypeScript development skills to address both operational and documentation challenges.