Brayan Cortés

Backend Engineer focused on reliability, performance, and production systems.

Bogotá, Colombia

About Me

Backend Engineer with experience designing, maintaining, and evolving mission-critical production systems for large-scale public transportation. Proven impact at LG CNS Colombia supporting high-concurrency environments, resolving production incidents, and automating operations using Java, Python, and SQL. Strong focus on reliability, performance, and DevOps practices.

Experience

LG CNS Colombia - SIRCI Project (Fare Collection System)

Systems Engineer / Backend Developer

2024 - Present

Stabilization, maintenance, and evolution of a large-scale electronic fare collection system used in Bogotá’s public transportation network. Actively involved in incident response and root-cause analysis under high-concurrency conditions. Backend development using Java and PL/SQL, operational automation with Python, and optimization of legacy web components.
JavaPL/SQLPythonHigh ConcurrencyProduction SupportAutomation
Thesis Proposal Registration System

Backend Developer

2023 - 2023

Designed and developed a secure backend prototype for managing academic thesis proposals. The system prioritized availability, observability, and data integrity using modern backend and monitoring tools.
PythonFastAPIDockerPrometheusGrafanaPostgreSQL
DiaBett

Development Leader

2023 - 2023

Led the development of a mobile application to support patients with Type 1 diabetes. Coordinated an interdisciplinary engineering and medical team from Tecnológico de Monterrey. Implemented the solution using Kotlin, Jetpack Compose, MVVM architecture, and Scrum methodology.
KotlinJetpack ComposeMVVMScrumMobile Development
Freelance

Python Instructor for Data Science

2020 - 2021

Designed and delivered personalized training programs focused on data analysis pipelines using Python, NumPy, Pandas, and visualization tools. Emphasized practical, production-oriented, real-world exercises.
PythonData AnalysisNumPyPandasVisualization

Education

Universidad Católica de Colombia

2019 - 2024

Systems and Computer Engineering
Oracle Next Education

2024 - 2024

Backend Development

Projects

Drawer-IA •

Machine learning project focused on image classification, trained on Google’s QuickDraw dataset and implemented in Python with TensorFlow.

Machine LearningPythonTensorFlowData Science

Skills

Java
Python
SQL
Kotlin
Docker
Linux
Git
JavaScript

Languages

English Intermediate (B1)
Spanish Native