UNStudio – Backend Developer (Freelance)

10/2024 – 12/2024 | Team size: 6 Tech stack: NestJS, MySQL, AWS R2, (ReactJS – frontend integration) Designed and developed scalable RESTful APIs for a design consulting and cost estimation platform, implementing complex business logic across multiple system modules. Integrated AWS R2 object storage for secure and scalable file upload, processing, and asset management. Optimized MySQL database schema and queries, improving data consistency and reducing query latency in high-usage endpoints. Implemented pagination, filtering, and full-text search mechanisms to improve data retrieval efficiency across large datasets. Collaborated with frontend team (ReactJS) to integrate API services and ensure end-to-end feature delivery. Project: https://viet-unstudio.com/en