Jairo Fernández jairoFernandez

Hello! 👋 Welcome to my Github Profile!

I'm Jairo Fernandez, Colombian 🇨🇴 Fullstack Developer at Konstruct (acquired by Civo). I mostly work with Node.js + Kubernetes and I love building tools that delete developer pain (and a little chaos) from daily workflows.

Want to connect? Find me on Dev.to, Twitter/X, or LinkedIn.

Here are my favorite builds 👇

🚀 Tools I Use Daily

Projects I use often, built to make developer life easier and more fun.

litek8s - A whole Kubernetes in one binary

**A whole Kubernetes in one binary.** A local cluster in about a second, your spare machines as one cluster, and about 20 MiB of memory at idle.

⚙️ What it does: Runs a full local Kubernetes cluster with a tiny footprint, fast startup, and a simple developer experience
🧠 Why I built it: I wanted a single binary that makes local Kubernetes feel instant, simple, and reliable
🔗 Website | GitHub

Kubiverse - Your Kubernetes Cluster as a 3D Pixel-Art World

**Walk around your real cluster.** Kubiverse turns your live Kubernetes cluster into an interactive voxel world built with Godot 4. Namespaces become factory halls, deployments become assembly lines, nodes are generator islands — and you navigate it all in real time.

🎮 What it does: Visualizes live Kubernetes resources (pods, deployments, services, nodes) as an explorable 3D pixel-art game, connected to your cluster via a lightweight Go bridge
🧠 Why I built it: Dashboards are boring — I wanted to feel the state of a cluster, not just read it
🌐 Try it: Play the browser demo | Download latest release
🎬 Watch it: Demo video on YouTube
🔗 GitHub

Knock - API Testing Without the Bloat

**A fresh alternative to Insomnia, Postman and friends.** Fast, focused, and built for people who just want to hit endpoints and move on.

⚡ What it does: API testing with a lightweight, no-nonsense workflow
🧠 Why I built it: I wanted less setup, less noise, and more shipping
📰 Read more: Knock: A new alternative to Insomnia, Postman and more

FNPM - End the Package Manager Wars

**The peace treaty for npm vs yarn vs pnpm drama.** Let your team use their favorite package manager while keeping projects consistent. Features transparent aliases, unified lock files, and zero learning curve.

📦 What it does: Allows teams to use different package managers (npm, yarn, pnpm, bun) while maintaining consistency
🎯 Why I built it: Tired of package manager conflicts and lock file drama in team projects
⚡ Daily use: Every project setup and dependency management
🔗 Documentation | GitHub

CLI Maker - Build CLIs Without the Mess

**Rapid CLI development tool that actually works.** Skip the boilerplate and focus on your CLI logic with built-in argument parsing, help generation, and modern tooling support.

🛠️ What it does: Streamlines CLI application development with templates and utilities
🎯 Why I built it: Creating CLIs shouldn't be harder than the problem they solve
⚡ Daily use: Prototyping tools and automating repetitive tasks
🔗 NPM Package | GitHub

Code Coach - Practice Algorithms by Actually Typing Them

**A VS Code extension that trains muscle memory, not copy-paste reflexes.** It measures your real typing speed and accuracy while you solve interview problems, blocks paste entirely, generates fresh exercises with a local AI model, and targets your weakest topics automatically.

⌨️ What it does: Enforces real typing practice through guided modes (Typing, Assisted, TDD, Blind), an AI coach, and an MCP interface for agents
🧠 Why I built it: Pasting solutions teaches nothing — you need the physical memory of writing code under pressure
🔗 GitHub

vsceasy - Build VS Code Extensions Fast

**The fastest way to scaffold a VS Code extension with React UI.** Zero-config build, a typed RPC bridge between extension and webview, and a CLI that gets you from zero to running in one command.

🛠️ What it does: Scaffolds VS Code extensions with React + typed RPC, handling all the boilerplate so you focus on your feature
🎯 Why I built it: The official extension API is powerful but verbose — vsceasy removes the ceremony
🔗 Documentation | GitHub

📚 Latest Blog Posts

(Some content might be written in Spanish)

Kubiverse: Explore Your Kubernetes Cluster as a Voxel World (published on September 29, 2026)
Two Real VS Code Extensions, Built with vsceasy (and What Each Feature Does) (published on September 27, 2026)
AI fatigue? (published on July 01, 2026)
Build VS Code Extensions Fast with vsceasy (published on June 14, 2026)
Knock a new alternative to Insomnia, postman and more... (published on May 18, 2026)
🚀 FNPM Just Became Invisible (In the Good Way): Transparent Alias, Better Tests & a Smoother Experience (published on November 14, 2025)
FNPM: The Package Manager Drama Ends Here 🚀 (published on February 13, 2025)
The sad story of node update! (published on August 14, 2024)
Docker is destroying my machine! 💥 (published on July 26, 2024)
CLI Maker: More Than We See (published on July 24, 2024)
Create a simple CLI, a mess (published on July 20, 2024)
Has tu README realmente útil (published on May 30, 2024)

... And several additional articles are available on my blog. Check it out!

✍️ Recent Public Contributions

I work in the open: these are all the Pull Requests I've opened or contributed to recently, only public repositories are visible.

PR Title	Repository	Status
#33: CI: xsec review on pull requests	`litek8s`	open
#32: Limitations: drop what 0.2.22 and earlier releases fixed	`litek8s`	merged
#31: Release 0.2.22	`litek8s`	merged
#30: Blog: 419 of 419, a question about latency (EN, ES)	`litek8s`	merged
#29: Overlay round trips, relays by latency, kubelet events, imagePullSecrets; 419/419 conformance on Linux	`litek8s`	merged
#814: ✨ feat(table): seed the search box from a defaultTermOfSearch prop	`konstruct-ui`	merged
#28: Blog: The pod that waits (how Pending works, and the Job deadline fix)	`litek8s`	merged
#27: Release 0.2.21: Job deadlines hold while a pod is Pending	`litek8s`	merged
#26: Job: enforce activeDeadlineSeconds while the pod stays Pending	`litek8s`	merged
#25: Blog: post series, and part 2 of the speed series	`litek8s`	merged

Overall, my most recent contributions (besides my own repos) have gone to @konstructio, @ideascoldigital, @microsoft, @kubefirst and @algolia.

⭐ New third-party projects I'm keeping an eye on

Repositories I've starred recently because they were interesting, cool, or useful.

Repository	Stars	Repository	Stars
gubernator-org/gubernator	7 ⭐	deepseek-ai/deepseek-harness	278.10K ⭐
k0sproject/k0s	6.6K ⭐	video-db/call.md	2.1K ⭐
darkshiftio/infrared-gitops-te...	1 ⭐	31qk/se	29 ⭐
darkshiftio/infrared-chart	1 ⭐	manaflow-ai/cmux	28.8K ⭐
terranvigil/yah264	4 ⭐	ideascoldigital/cli-maker	5 ⭐
xerj-org/xerj	18.9K ⭐	douglasmakey/poc-rust-https-sn...	17 ⭐
M4ss1ck/maibuk	7 ⭐	douglasmakey/send-file-over-tc...	14 ⭐
blackhol214/rectangulo-verde	1 ⭐	douglasmakey/ebpf-learning	16 ⭐
ripienaar/free-for-dev	142.6K ⭐	douglasmakey/admissioncontroll...	29 ⭐
hasaneyldrm/exercises-dataset	23.7K ⭐	douglasmakey/isoserver	10 ⭐

^{_{Last updated: November 11, 2026 at 19:25:52 EST. The content here updates twice daily or when manually triggered.}}

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