Andrew Prasertphol

Led migration of backend services from Express.js with Sequelize to TypeScript-based Nest.js with TypeORM, improving type safety and maintainability. Designed and deployed scalable Kubernetes-based microservices on GKE for high availability. Implemented Prometheus/Grafana monitoring and OpsGenie alerts to improve observability. Built custom Next.js Shopify frontend pages and integrated with Shopify REST API and GraphQL. Performed code reviews, updated Confluence docs for RCA, and enhanced data security with OpenPGP and Google Cloud Secret Manager.

Developed event-driven microservices using AWS SNS processing ~10K daily requests; implemented Elasticsearch for fast search indexing and Redis caching to reduce server load. Built React.js components with Next.js SSR, collaborated with UI/UX via Figma. Strengthened authentication using JWT/OAuth with SSO. Designed Node.js serverless ETL pipelines using AWS Lambda to process survey results and lead data, integrating Apache Kafka and storing in DynamoDB and S3 for scalable analytics. Containerized apps with Docker and Kubernetes; set up CI/CD with AWS CodePipeline for zero-downtime releases. Wrote unit tests with Jest and Cypress; supported production issues using CloudWatch, PagerDuty, Sentry/DataDog/LogRocket. Used LaunchDarkly for feature flags.

Designed scalable backend services with Prisma ORM on MongoDB and PostgreSQL; built and optimized data models and migrations. Developed GraphQL APIs with Apollo Server and REST APIs; created responsive React frontend (APFM) with Material UI, Tailwind CSS, using React Hooks and Redux. Implemented real-time WebSockets and Web Worker API for background processing; authored API docs with Swagger for clear request/response schemas and authentication methods.