Backend
Mostly APIs and business logic. I have worked on high-concurrency services and maintained long-running legacy systems. Database design, slow queries and caching are part of the daily routine.
PHP · Go · Python · FastAPI · ThinkPHP
Database
Schema design, indexing, hunting down slow SQL. I have set up primary-replica and read-write splitting, and I lean on Redis for hot data — it saves a lot of trouble.
MySQL · MariaDB · Redis · MongoDB
Frontend
I can build the interface myself without waiting for a design file. The frontend of this site is hand-written, with responsive layouts tested on phone and tablet.
JavaScript · Vue 3 · CSS3 · HTML5
Servers & Deployment
From buying the machine to shipping it live — all of it. Nginx config, SSL certificates, firewalls, backup scripts, cron jobs.
Linux · Nginx · Docker · Shell · BT Panel
Everyday Tools
Git for code, Shell for scripts. If it can be automated, it should be.
Git · Docker Compose · Crontab
Troubleshooting
Read logs, trace the request path, capture packets. I work from the symptom downward rather than tweaking until it happens to work.
Log analysis · Performance tuning · Debugging
