Hi, I'm Yinjian

Developed user authentication API using Python, Node, and collaborating across teams.

Built a translation platform solely using LLM, RAG, Next.js, AWS, cutting i18n documents translation time from days to minutes and eliminating external translation agency dependencies.

Led 2s engineer to develop a cloud video rendering service (Node.js, Go, RabbitMQ) from scratch and coordinated with 5 teams (11 members) to support for more than 5 products integration.

Migrated a rendering engine from a single machine to scalable GPU servers, boosting rendering speed by 3× and simplifying deployment.

Optimized rendering tasks scheduled within cron jobs by designing a Redis-based caching strategy, reducing rendering costs by 50%.

Delivered REST and WebSocket APIs for a text-to-video generation product, collaborating with 3 teams on integration and testing to enable seamless mobile and front-end functionality.

Led 3 iOS developers to deliver major version updates, integrating video rendering engine new features.

Developed an iOS module registration library to support modular architectures across multiple projects.

Designed a local WebSocket-based backend service using Node.js and JavaScript to enable LAN-based file transfer between PC and , accelerating mobile debugging workflows.

Drove evaluation and adoption of a new iOS tech stack (RxSwift, MVVM, modularization) by developing libraries and documentation that enabled team integration in new projects.

Mentored an intern through mobile app development, using OOP principles, Git workflows, and conducted code reviews, improving code quality.