Lei Chunan

Collaborated with product and engineering teams to implement backend services and functional architectures. Developed microservices using Python and FastAPI, connected to PostgreSQL/MySQL databases. Handled deployment and monitoring of internal services with Docker, Nginx, and Linux. Troubleshot bugs and optimized existing services for stability and performance. Key Contributions: Contributed to internal data processing tools used by multiple departments. Improved service reliability and maintainability through modular microservice design.

Developed web and desktop applications for clients, integrating Python backend with React.js and Next.js frontends. Built automation tools and web crawlers using Python, Selenium, and BeautifulSoup. Worked on blockchain integration projects, connecting web apps to Bitcoin, Ethereum, Cardano, Solana, Aptos, and Sui networks. Implemented features related to proof-of-work and proof-of-stake validation, wallet interactions, and decentralized transaction monitoring. Maintained deployments using Docker and CI/CD pipelines; ensured microservices reliability and performance monitoring.

Assisted in the development of a PC-based internal business application using Python and PyQt/Tkinter. Implemented features and integrated SQLite/PostgreSQL databases under guidance of senior developers. Participated in debugging and testing, gaining practical experience in software development lifecycle.