Kevin Z.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

* Full Stack JavaScript Developer * With over 15 years of full-stack experience, I have gained considerable expertise in software design, development, deployment, issue tracking, and performance optimization. I have a passion for programming and excel at continuously improving myself to adapt to the ever-evolving tech landscape. * Professional Skills * 1. Programming Languages JavaScript/TypeScript, Java, Python 2. JavaScript Stack - Frontend: React, Vue, Next, Nuxt, React-Native, Electron, uni-app - Backend: Express, Koa, NestJS, Prisma, Mongoose, TypeORM, Socket.IO - RESTful and GraphQL APIs 3. Others - Spring Cloud, Vert.x, MySQL, Postgres, MongoDB, Couchbase, Redis, RabbitMQ, Kafka, Elastic Search, Nacos, ZooKeeper, Nginx, Docker, Kubernetes - Experienced in integrating ChatGPT APIs to enhance application functionality