Everything about PostgreSQL: admin, monitoring, application development, data recovery, extension development, SQL optimizing, etc…"
Primary development language. Write robust, maintainable programs: web servers, crawlers, exporters, cli utils, etl pipeline, etc…
Rich experience on various data systems: Redis, HBase, MongoDB, Cassandra, Elasticsearch, Timescaledb, Kafka, MySQL, SQL Server, ODPS, Consul, Etcd, etc..
Extra domain knowledge about: Web Frontend/Backend, Networking, Manufacturing, GIS, Meteorology, Info Sec
Write advanced SQL queries. Data analysis with statistic tools: SQL, Python, R, Matlab, Excel etc…
Rich experience on making interactive visualization products with D3.js, echarts.js, grafana panels, etc…
Handy DevOps tools for daily use. Writing sophisticated roles and playbooks. orchestration and maintain production environment in a declarative way
Using as the main operating system. familiar with *nix tools such as bash vim git awk sed grep systemd ntp ssh dns etc…
Designing sophisticated application with Grafana. Deeply customize, write plugins, advanced visualization.
Setup & configure Prometheus. Desinging record & alert rules. Writing PromQL Queries. Writing metric exporters.
Configuring nginx, writing lua scripts for OpenResty. Customize API gateway such as Kong. And other LB such as haproxy
Handy tools for daily use: solving trivial tasks. automation, crawlers. data process & analysis, web servers, AI models, etc…
Writing frontend & backend application with js. experience with common js libs: Jquery, Bootstrap, EazyUI and HTML, CSS, GraphQL, etc…