SERGIO GEOVANY PORTILLA CASTAÑEDA
Full-stack Developer 

About me

Frontend-focused Engineer building high-performance web and mobile apps. I enjoy working on scalable architectures, design systems, and improving performance at scale. Recently focused on AI-driven development workflows to ship faster, write better code, and automate repetitive tasks.

• 💼 Currently working at ADDI (fintech)
• 🧠 Exploring AI tooling, architecture patterns, and developer productivity
• 🔭 Currently working with React, React Native, Next.js & AI workflows
• 🌱 Learning more about AI driven development frameworks, three.js
• 💪 Strong focus on frontend architecture, performance, and design systems

🔥 Some used languages, frameworks and tools 🔥

Front-end

Mobile

Testing

Design

Back-end

Databases

Devops

---
config:
  radar:
    curveTension: 0.1
  themeVariables:
    cScale0: "#13D3DD"
---
---
title: "🧠 Stack skills 🧠"
---
radar-beta
  axis m["Frontend"], s["AI"], e["Architecture"]
  axis h["Design"], g["Backend"], a["Devops"]
  axis d["Database"], t["Testing"], p["Product"]
  curve strengths["Strengths"]{100, 80, 90, 90, 50, 70, 50, 60, 80}
  max 100
  min 0

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🛠️ Job background 🛠️

💡 In the overview below you'll see all my background projects

⏱️ Full-time projects

• 

  ADDI
  Front-end engineer II
  Full-time • 1 year
  Technologies: React, Github actions, Java, Redux, Vertx

• 

  Ceiba Software (Scotiabank Colpatria outsourcing)
  Development architect
  Full-time • 2 years
  Technologies: Angular, Node JS, Java, Docker, Jenkins, SonarQube, Black-duck, Fortify

• 

  ID systems sa (National registry of Colombia outsourcing)
  Junior developer
  Full-time • 1 years
  Technologies: Angular, java JSP spring-boot, JSF

️📌 Freelance projects

• 

  Holy brands
  Front-end developer
  Freelance • 4 months
  Technologies: Angular, Redux, Flux

• 

  Funservir
  Developer
  Freelance • 10 months
  Technologies: Python, Django rest Angular Docker, Postgresql

️🎨 Own projects

• 

  Rom.U
  Lead developer | Project manager
  Project • 2 month
  Technologies: Solid js, Vite js, Github actions, Firebase, React Native, Nest Js

• 

  EclatApp
  Lead developer | Project manager
  Project • 1 year
  Technologies: Node JS, Azure, Firebase, React Native, Nest Js, Scala, Gatling

⚡ Stats ⚡

📎 Get in touch 📎