- Designed and managed end-to-end AWS cloud architectures (EC2, Lambda, S3, SES, VPC, SSM) and scalable backend services for production applications.
- Built and launched JoyTools (https://tools.joydii.com), a free online utility platform featuring 104+ developer, SQL, PDF, and AI tools.
- Engineered a hybrid execution architecture combining client-side browser processing for code/SQL formatters with high-concurrency, stateless backend workers for heavy PDF compression and AI background removal.
- Focused on system reliability, zero-persistence data privacy, API performance optimization, and developer experience (DX).
