Juls

Why Did My WebRTC Connection Fail?

When I was an Android Java mobile application engineer before transitioning to a backend engineer, I once developed a real-time voice…

Do NOT`tail -f /dev/null` to Keep a Container Running: The Role of the PID 1 Process

While reviewing a legacy system at work, I came across a container setup where a Python script was running as a background job. To keep the…

Why Apps Exist? Why Vibe-Coding Will Hits a Dead End In the End?

We are currently living in the golden age of “Vibe-Coding.” With the advent of LLMs, the barrier to entry for software development has…

Styling Your Code: The conventional style guide for Clean Codes

I started programming by reading “Clean Code”, and I’ve almost always applied it in practice since then. By keeping my work clean, I’ve…

Security Blind Spot of Docker Proven by AI Agents: Why Docker is Being Replaced by Podman and…

Recently, a major talking point went viral across the tech community: OpenAI’s AI coding agent, Codex, managed to alter core system…

“Please Don’t Erase My Image, kubelet!”: Operating Kubernetes in a Closed Network

“This happened recently when we were migrating an existing Docker Compose-based application architecture to Kubernetes. The system we were…

NestJS vs. Spring: Which one is BETTER?

In web application development, choosing the right framework is crucial. While there are many frameworks available, NestJS and Spring are…

Lambda Does Not Be Within Your VPC: The Lambda Service VPC and the Hyperplane ENI Architecture

TypeScript is Not TypeScript: The Trap of Generic

Something that should never happen in production actually happened.

Impressionism: Perception as Reality