Worked on the aws-powertools/powertools-lambda-typescript repository to enhance event-driven AWS Lambda workflows by delivering robust S3 event parsing for SQS-delivered notifications. Leveraging TypeScript and Zod, implemented a custom JSONStringified helper to centralize JSON payload validation within schema definitions, reducing parsing errors and improving data integrity. The approach involved parsing the SQS record body as JSON and validating it against the S3 schema, aligning schema handling with the S3 event model. This work improved the reliability and maintainability of Lambda processing, supporting higher uptime and more predictable downstream behavior while enabling easier future enhancements to the codebase.