Full-Stack Developer Learning Journey

Current studies and continuous learning of a Colombian full-stack developer — software architecture, microservices, React Native, Docker, GraphQL, advanced TypeScript, serverless and system scalability. Each topic is rated by my real confidence level and — where possible — linked to the actual code where I use it.

Last updated: September 2026

At a glance

Software Architecture Patterns

System Design

Self-taught · production work

ConfidentSince 2024

Used in: 13 production microservices on the artag-services org

React Native Development

Mobile Development

Self-taught · Expo docs

IntermediateSince 2025

Docker & Containerization

DevOps

Self-taught · production work

ConfidentSince 2023

Used in: Infra repo + every service in artag-services

WebSocket & Real-time Communication

Backend Development

Self-taught · production work

IntermediateSince 2024

Used in: sync-service · whatsapp/slack integrations in artag-services

System Scalability & Performance

System Design

Self-taught · AWS docs

IntermediateSince 2024

Used in: gateway-service routing 12+ downstream microservices

Advanced TypeScript

Programming Languages

Self-taught · daily driver

ConfidentSince 2021

Used in: Every project I ship — microservices, this site, integrations

GraphQL & Apollo

API Development

Self-taught · Apollo docs

BeginnerSince 2025

Web Application Security

Security

OWASP · production work

IntermediateSince 2024

Used in: identity-service · CSP and rate-limit on this site

AI Agents & LLM Integration

Artificial Intelligence

Self-taught · n8n + LLM APIs

IntermediateSince 2025

Used in: agent service · n8n chat widget on artagdev.com.co

Serverless & Edge Architecture

Cloud Computing

Self-taught · production work

ConfidentSince 2023

Used in: This site (artagdev.com.co) — middleware + serverless API routes

Database Design & Optimization

Backend Development

Self-taught · production work

ConfidentSince 2022

Used in: identity-service · scheduler · sync-service

Formal Education

5.0 / 5.0

Misión TIC 2022 — Software Development

Universidad Autónoma de Bucaramanga (UNAB)

Colombia · 2021 – 2022

  • Full government scholarship — Programa Misión TIC 2022, Ministerio TIC de Colombia
  • 5.0 / 5.0 in every semester (Colombian grading scale, top mark)
  • Web application development — fundamentals, JavaScript / TypeScript, frontend & backend
View official certificate (PDF)
Program cancelled

Web Design

SENA — Servicio Nacional de Aprendizaje

Colombia · 2023

Enrolled out of personal interest in the aesthetic side of the craft — visual design, UI fundamentals, layout.

The program was cancelled by SENA due to a platform migration and low enrolment. The interest stuck — visible across my UI work.

Online Courses & Certifications

Trained primarily through Fernando Herrera (DevTalles) — top-5 Spanish-speaking instructor on Udemy, 4.8+ avg rating, 19+ years in production. Every certificate below is publicly verifiable on Udemy.

7
Certifications
4.8
Instructor rating
  • NestJS: Microservicios

    · Fernando Herrera · Udemy · 2024

    → Architecture behind the 13-service artag-services org

    Verify cert
  • Patrones de Diseño

    · Fernando Herrera · Udemy · 2025

    → Design patterns applied across microservices

    Verify cert
  • React Native + Expo

    · Fernando Herrera · Udemy · 2024

    → Mobile development with React Native + Expo

    Verify cert
  • Flutter: De cero a experto

    · Fernando Herrera · Udemy · 2024

    → Second mobile stack — Dart / Flutter

    Verify cert
  • n8n — Automation & Workflows

    · Fernando Herrera · Udemy · 2026

    → n8n chat widget powering this site

    Verify cert
  • Next.js: El framework de React para producción

    · Fernando Herrera · Udemy · 2026

    → App Router, server components y edge middleware — este sitio está construido con él

    Verify cert
  • NodeJS: De cero a experto

    · Fernando Herrera · Udemy · 2026

    → Backend en Node y microservicios — base de artag-services

    Verify cert

More certifications from Fernando Herrera and other platforms — listed here as the strongest signals; full transcript available on request.

Up Next — My Learning Roadmap

Courses I'm planning next, expanding into cybersecurity, advanced DevOps and cloud with other top instructors.

  • Ethical Hacking — De principiante a profesional

    · Alejandro Escobar · Udemy · Cybersecurity
    Planned 2026
  • Kubernetes Certified Administrator (CKA)

    · Mumshad Mannambeth · KodeKloud · DevOps
    Planned 2026
  • AWS Certified Solutions Architect — Associate

    · Stéphane Maarek · Udemy · Cloud
    Planned 2026
  • AZ-104 Microsoft Azure Administrator

    · Alan Rodrigues · Udemy · Cloud
    Planned 2027

Learning Never Stops

Knowledge is power, and I'm committed to staying at the forefront of technology through continuous learning and hands-on practice.

Learning Journey — Full-Stack Developer Skills & Current Studies | Artag