This article discusses implementing a middleware-based workflow for AWS Lambda functions using TypeScript to improve maintainability and scalability. It highlights the benefits of TypeScript for AWS Lambda, such as type safety and reduced errors, and emphasizes the importance of schema validation for data integrity. The article explores three approaches: a basic Lambda, a Lambda with @middy, and one enhanced with @raminy/ajv-ts-schema for schema validation. It also addresses the drawbacks of manual validation, like tediousness and error-proneness. By using middleware and schema validation, Lambda functions focus on business logic, offloading validation to reusable components.

During their tenure at IE, the author worked as a Senior Front-End Developer on the Toyota website team. They contributed to the development and maintenance of the ToyotaKit component library, implemented OCR functionality using Azure Cognitive Services, and worked on various features for the Toyota.com.au website. They also provided mentorship to junior and mid-level engineers and received recognition for their technical expertise and collaborative spirit.