I build software that scales
and teach how to do it.
Tech Lead · Software Architect · Technical content creator
I've spent 9+ years building products with React, Next.js, Nest.js and AWS. Everything I learn along the way becomes practical articles and interactive courses where you actually code, right in the browser.
Useful content
I write about what I build
No recycled theory: practical notes straight from production code.
Applied AI
RAG, embeddings, tool calling, evals: AI that ships to production, not demos.
Serverless on AWS
Lambda, ECS, queues, Step Functions: architecture that scales without billing surprises.
Modern frontend
React, Next.js, Astro, real-world performance and design systems that outlive the team.
AI-built startups in 2026: the real numbers behind the hype
Cursor, Lovable, Cognition, Base44, Cal AI and the YC data: what they actually earn, with how many people, and which patterns repeat. With charts.
Read article →How to survive as a programmer in the AI era (without turning cynical or naive)
AI isn't coming for your job — it's coming for your tasks. What's really changing, which skills are appreciating, and which ones are quietly losing value.
Read article →The NAT Gateway nobody asked for: your VPC's silent bill
Why the most expensive component in many AWS accounts is a networking piece nobody remembers designing, and how VPC endpoints change that equation.
Read article →Want the content first? Follow me:
Courses
Learn by coding, not by watching videos
I'm building an interactive course platform: you write real code in the browser, exercises grade themselves and an AI tutor helps when you get stuck.
Real code in the browser
Write and run actual code, nothing to install.
Auto-graded exercises
Tests validate your solution instantly, with hints when you fail.
AI tutor
Contextual explanations and help when you get stuck.
Progress & certificates
Advance through modules, keep streaks and earn your certificate.
Building in public
What I'm building now
JXBS — AI-first recruitment
A recruitment operating system where job openings are created by chatting with AI — which also screens, scores and advances candidates. I am the top contributor to the monorepo (1000+ commits), from UI to infra. Much of what I write comes from here.
Design system
Owner of the shared UI component library used across every portal in the monorepo.
Conversational AI
Vacancy-creation chat and matching engine with embeddings and structured scoring.
AWS infra
ECS Fargate, queues, Secrets Manager and CI/CD, managed with OpenTofu.
Architecture
Migration from a monolithic backend to per-audience backends with NestJS 11 and Next.js 15.
About me
Hi, I'm Yohangel
Developer from Caracas. I went through agencies and startups in Venezuela, Spain and remote — from building websites in 2016 to leading the architecture of an AI-first product today.
This is my digital home: I publish what I learn, build courses and share the process. If you want the formal career detail, it's in the CV.