Languages
- Python
- SQL
- Bash / shell scripting
Databases & Messaging Queues
- PostgreSQL
- Redis
- RabbitMQ
- SQLite
- MySQL
- MongoDB
Infrastructure
- Docker & Docker Compose
- Nginx reverse proxy, TLS termination
- Linux VPS hardening, SSH tunneling
- Certbot / Let's Encrypt
- Cloudflare DNS, Full Strict SSL
- GitHub Actions
Observability
- OpenTelemetry instrumentation, Collector
- Prometheus
- Grafana
- Loki log aggregation
- Tempo distributed tracing
- Git & GitHub
- Postman
- Restfox
- VS Code + Cline
- Claude Code
- AntiGravity
Concepts
- Distributed systems design
- Event-driven & message-queue architecture
- Async job queues & background processing
- OAuth2 PKCE & token lifecycle
- Incremental sync — frontsync / backfill
- Structured logging & log discipline
- System design analysis & technical writing