Tech stack: Django, GraphQL, k8s, Flask, MongoDB, Redis* Spider and auto-operate web with selenium running in docker and supported VNC connection.* EOS coin: rent of CPU, deposit with CNY* Cryptocurrency Exchange Assitant Backend with analyzing user's trade history by calling the exchange’s API at the maximum rate limit* WeChat mini-program E-commerce system* Small tool for searching similar images with search Engine: Baidu and Sogou

Tech stack: Django, AioHttp, Postgres, Docker# Backend Team Leader of Bixin App Backend* Participate in the design of products and schedule or implement tasks* Introduce technologies and tools, such as PoEditor, Postman, GraphQL, to solve daily inefficiencies. - Use Postman to make API documentation and mocks. - Use Poeditor to improve the translation process in Django. - Use GraphQL instead of RESTFull and save communication time between server and client colleagues.* DevOp for Online Service# Deploy tool based on Docker SwarmDeploy tool based on Docker Swarm. Split the service into several units with Docker to deploy easily.* Made script to start, deploy, run, update the service.* Use Etcd, Confd to auto-update the settings for service.* Deploy Rsyslogd to collect logs from different containers.# Haobtc Website* Front and back end of bulletin board system implemented.* Deploy Security Monitor and Iptable to enhance the security of service.

Tech stack: Linux/C, Shell, Redis, MySQL# Enterprise communication Service Backend * Instant Message、 VOIP service which is based on open-source projects like Asterisk 、 OpenSIP、Mosquitto. It includes Audio-Call，Instant/offline message function* Introduce Redis+Lua tech which was new to achieve the presence function in IM # DevOps* Love to learn new tools and techs and introduced them into our team* Introduced git, GitLab, Docker into our team and wrote scripts to switch smoothly from svn to git.* By using GitLab CI I made the old deploy and release process automatic.* I took the initiative to look for security solutions and deployed Fail2ban and Monit on our online service.