xfangsx

software engineer & open source enthusiast
status: online

📌 about me

I'm a backend developer focused on distributed systems and network protocols. Currently working on low-latency solutions and exploring the intersection of performance and reliability. Based in EU, working remotely.

🛠️ projects

distributed task queue

Lightweight task queue with Redis backend, supporting at-least-once delivery and retries. Used in production for background job processing.

network latency analyzer

Go-based tool for measuring and visualizing network performance between cloud regions. Includes Prometheus metrics and Grafana dashboards.

config management tool

Python utility for managing dotfiles and server configurations across multiple environments. YAML-based with templating support.

📝 recent posts

2025-12-15
Optimizing TCP for high-bandwidth links
Tuning buffer sizes and congestion control for 10Gbps networks.
2025-11-28
A practical guide to eBPF tracing
Using eBPF to debug production systems without recompilation.
2025-11-10
Setting up secure tunnels for IoT devices
Lessons learned from deploying stunnel at scale.