Hello, I'm

Sebastian Orjuela

Backend Developer

Backend Developer specialized in robust APIs with Java and Spring Boot. Experience in concurrency, automation, and clean architecture.

About Me

Developer.java
// Java — primary stack
public class BackendDeveloper {

  private final String name    = "Sebas Orjuela";
  private final String role    = "Backend Developer";
  private final String[] stack = {
    "Java", "Spring Boot",
    "Python", "FastAPI"
  };

  public String passion() {
    return "Clean APIs & Microservices";
  }
}

# Python — complementary stack
class SameDevPythonSide:
    stack    = ["FastAPI", "Quart"]
    devops   = ["GitHub Actions", "Docker"]
    approach = "Test-driven & CI/CD first"

I am a backend developer focused on Java and Spring Boot, specialized in designing and building robust, scalable, and maintainable APIs.

I have complementary experience in Python with FastAPI and Quart, which lets me adapt to different environments. I also work with GitHub Actions for CI/CD automation and apply testing practices to ensure application quality.

I focus on clean code, best practices, and building solutions that efficiently solve real problems.

Java & Python Spring Boot · FastAPI · Quart
DevOps & CI/CD GitHub Actions · Docker · Podman
Colombia Available for remote work

Skills & Technologies

Languages

  • Java
  • Python
  • TypeScript
  • JavaScript

Frameworks

  • Spring Boot
  • Quart
  • FastAPI
  • React

Databases

  • PostgreSQL
  • MySQL
  • MongoDB

Tools

  • Git
  • GitHub
  • Docker
  • Podman
  • Maven

Testing

  • JUnit
  • Mockito
  • Pytest
  • Playwright
  • Postman

Concepts

  • REST APIs
  • Microservices
  • CI/CD
  • Asynchronism

Experience

December 2024 - June 2025 | 6 months

Software Developer Intern

Lumu Technologies

I developed and maintained REST APIs in Python using the Quart framework, following clean code principles and technical documentation standards. I contributed to the frontend development of internal applications using React, TypeScript, and Material UI (MUI), implementing reusable components and functional improvements. I collaborated in agile workflows using Git, Bitbucket, Jira, and Confluence under Scrum methodology, supporting system maintenance, continuous improvement, and delivering enhancements that optimized engineering team processes.

Education

Academic Degrees

2026 – Present

Computer Engineering

Universidad de Caldas
2023 – 2025

Technologist in Software Analysis and Development

SENA
2021 – 2022

System Technician

SENA

Certifications & Courses

Application of the SCRUM Framework for Software Development Projects

SENA July 2026

Database Development with MySQL

SENA May 2026

Google Cybersecurity

Coursera June 2025

Introduction to JavaScript Programming

Universidad Distrital FJC – Generación TIC December 2023

Digital Creative Industries

UTP – Misión TIC 2022 December 2022

Projects

Complete

Bankcore System Api

Banking system composed of two microservices...

  • Java
  • Spring Boot
  • PostgreSQL
  • Docker
  • CI/CD
  • JUnit
  • Mockito
Complete

SwissRoute API

Public transport trip planning REST API built with Spring Boot and PostgreSQL. Integrates external transport APIs to manage stations, connections, favorite routes, and travel history

  • Java
  • Spring Boot
  • PostgreSQL
  • Docker
  • CI/CD
  • JUnit
  • Mockito
In Progress

Sports Pulse API

Real-time football analytics platform...

  • Java
  • Spring Boot
  • PostgreSQL
  • Docker
  • CI/CD
  • JUnit
  • Mockito

Get in Touch

Have a project in mind or just want to say hello? I'd love to hear from you.