Available for new roles

I build the systems your business runs on.

Software engineer building reliable products end to end: backend services, fast interfaces and cloud infrastructure, with the language the problem calls for, and growing into AWS, DevOps and cloud-first development.

Let’s talkSee my work

Software Engineer · Santa Marta, Colombia · Remote · Hybrid · Open to relocation

years building production software
4+
APIs, interfaces and cloud, using the language the problem needs
Full stack
freelance products shipped end to end
5

Under the hood

Browse my career like a codebase

cd-janz — README.md

# Juan Camilo Zúñiga
> Software Engineer · Santa Marta, Colombia
​
Software engineer building reliable products end to end: backend services, fast interfaces and cloud infrastructure, with the language the problem calls for, and growing into AWS, DevOps and cloud-first development.
​
## The human in the loop
I started in technology at 18 as a deliberate, non-traditional choice, and it became the center of my life. I learn fastest where things are hardest: a tough technical bottleneck is, for me, a playground.
​
I have led the migration and modernization of fintech and accounting SaaS platforms, designed backends in NestJS and ASP.NET Core, and shipped fast interfaces with React, Next.js and Astro.
​
I care about understanding what the business needs and choosing the simplest architecture that solves it. I work across the stack (backends in Java, Kotlin, Go, TypeScript and C#; interfaces in Angular, React and Astro) and pick the tool for the problem, not the other way around. I’m growing into AWS, infrastructure as code and DevOps to build cloud-first.
​
## Skills
- Backend: Java, Kotlin, Spring Boot, NestJS, Go, Gin, Fiber, Chi, Cobra, C#, ASP.NET Core, Python, FastAPI
- Frontend: TypeScript, Angular, Astro, React, Next.js
- Data: SQL, DynamoDB
- Cloud & DevOps: AWS, AWS CDK, ECS Fargate, Docker, Kubernetes
​
## Contact
- https://www.linkedin.com/in/juanzuniga79/
- https://github.com/cd-janz

mainOpen to work

MarkdownUTF-8EN

About

The human in the loop

I started in technology at 18 as a deliberate, non-traditional choice, and it became the center of my life. I learn fastest where things are hardest: a tough technical bottleneck is, for me, a playground.

I have led the migration and modernization of fintech and accounting SaaS platforms, designed backends in NestJS and ASP.NET Core, and shipped fast interfaces with React, Next.js and Astro.

I care about understanding what the business needs and choosing the simplest architecture that solves it. I work across the stack (backends in Java, Kotlin, Go, TypeScript and C#; interfaces in Angular, React and Astro) and pick the tool for the problem, not the other way around. I’m growing into AWS, infrastructure as code and DevOps to build cloud-first.

  • SpanishNative
  • EnglishB1
  • Remote / Hybrid · Open to relocation

Skills

Technologies I trust, and where I proved them

Core

Backend

Services and APIs that stay reliable for years: Java, Kotlin and Spring Boot, Go, NestJS, ASP.NET Core and Python.

  • Java
  • Kotlin
  • Spring Boot
  • NestJS
  • Go
  • Gin
  • Fiber
  • Chi
  • Cobra
  • C#
  • ASP.NET Core
  • Python
  • FastAPI

Core

Frontend

Typed interfaces from component to page: TypeScript with Angular, React, Next.js and Astro.

  • TypeScript
  • Angular
  • Astro
  • React
  • Next.js

Core

Data

Relational modeling and solid SQL, plus key-value stores like DynamoDB.

  • SQL
  • DynamoDB

Growing focus

Cloud & DevOps

Where I’m heading: infrastructure as code, containers and AWS, designed in from day one.

  • AWS
  • AWS CDK
  • ECS Fargate
  • Docker
  • Kubernetes

Also worked with Lua

See full stack

Experience

Where I’ve built, and what it delivered

  1. Full-stack Developer

    Freelance · Santa Marta, Colombia · Remote

    Apr 2025 – Present1 yr 7 mos

    End-to-end delivery of cross-platform products, integrating complex backend logic with polished user-facing apps.

    • Mobile athletic training and blog application.
    • Industrial recycling scheduling and management platform.
    • Enterprise web performance optimization and redesign.
    React NativeExpoReactNext.jsAngularRedux+4 more

  2. Semi-Senior Full-stack Developer

    IGD S.A.S · Barranquilla, Colombia · Remote

    Jan 2021 – Feb 20254 yrs 1 mo

    Led the development and migration of enterprise fintech and accounting SaaS platforms, from NestJS and ASP.NET Core backends to Next.js and Astro frontends.

    • Improved scalability and concurrency of core systems, reducing latency by 17%.
    • Led legacy modernization and technical-debt reduction, lifting team productivity by 12%.
    • Defined engineering standards and design patterns for consistency across platforms.
    ReactNext.jsAngularAstroTailwindNestJS+3 more

See full experience

Education

The foundation behind the work

  • In progress (paused)

    Systems Engineering

    Universidad del Magdalena

    Aug 2019Santa Marta, Colombia

    Training focused on the intersection of system logic and enterprise architecture: clean code, microservices and full-stack integration.

Selected work

Work that shows how I think

2026 · test

efRouting technical test

SpaceX launch visualizer built with Go and Next.js, hexagonal architecture and 100% infrastructure as code.

GoNext.jsTypeScriptPython

2026 · test · Mid-level full-stack developer

efRouting technical test

GoNext.jsTypeScriptPythonAWS CDKDynamoDB

Problem. Visualize SpaceX data through a fast, scalable and reproducible cloud solution.

Approach. A Go service organised with hexagonal principles, an automated Python ETL feeding DynamoDB, ECS Fargate microservices and the entire infrastructure defined with AWS CDK.

Why it matters. It shows end-to-end ownership: domain design, data pipeline, deployment and a typed Next.js client.

Code ↗
Sample

2021 – 2025 · enterprise

IGD Plus

Modular enterprise core with a microkernel-inspired architecture: accounting, credit and operations as isolated modules.

TypeScriptReactTailwindASP.NET Core

2021 – 2025 · enterprise · Technical lead

IGD Plus

Sample

TypeScriptReactTailwindASP.NET CoreSQL

Problem. Business management software that had to grow module by module without destabilizing the core.

Approach. The engine is isolated from domain modules (accounting, credits, operations), so each one evolves, ships and fails independently.

Note. Details are intentionally high-level due to confidentiality.

2025 · personal

Neovim dotfiles

A lean, Lua-based Neovim setup built to free RAM for the services I actually run, without giving up a full-stack workflow.

LuaNeovimLSPTreesitter

2025 · personal · Author

Neovim dotfiles

LuaNeovimLSPTreesitter

Problem. Heavy IDEs competed with local microservices for memory.

Approach. A modular, keyboard-driven configuration with tuned LSP and Treesitter so Angular templates and embedded CSS still get proper IntelliSense.

Result. A noticeably lighter editor and a deeper understanding of the frameworks I use every day.

See all projects

Contact

Let’s build something solid together

Hiring, a project or just a technical question? Write me and I’ll reply within 24 hours.

Prefer a direct channel?