Available for opportunities

Backend Engineer

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Specialized in high-throughput microservices, cloud architecture, and event-driven systems

Brayan Barco
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Engineering Philosophy

Obsessed with performance, scalability, and clean architecture

4+ Years
Backend Engineering
15+
Production Systems
AWS Certified
Solutions Architect

Performance First

Sub-250ms p99 latency is not a goal, it's a requirement

Clean Architecture

Hexagonal patterns for maintainable, testable systems

Resilience

Systems designed to survive chaos and scale gracefully

Professional Journey

Java Backend Developer

Pragma S.A.
Dec 2025 – Feb 2026
Cúcuta, Colombia
  • Built reactive microservices with Spring WebFlux and Hexagonal Architecture
  • Sustained high concurrency with sub-250ms p99 latency under peak load (k6 tests)
  • Adopted Kotlin for new service modules with coroutines for non-blocking I/O
  • Mentored 3 junior engineers through weekly pair programming sessions
  • Deployed Dockerized microservices on AWS
Spring WebFluxKotlinHexagonalAWSDockerk6

Java Backend Lead

Nelumbo Consultores S.A.S
Jun 2025 – Dec 2025
Cúcuta, Colombia
  • Implemented scalable Hexagonal Architecture with API-First (OpenAPI) and AWS services
  • Led API performance optimizations for SURA, reducing p99 latency by ~80% (1.8s → <360ms)
  • Migrated notifications to event-driven model with Apache Kafka
  • Achieved 80% test coverage with JUnit/Mockito tracked by JaCoCo
  • Set up distributed observability with OpenTelemetry and Prometheus/Grafana
Spring BootKafkaAWSOpenTelemetryPrometheusSonarQube

Full-Stack Java Developer

Bomberos de Villa del Rosario
Jan 2025 – Jun 2025
Cúcuta, Colombia
  • Mapped 50+ real-time data points via Google Maps API
  • Cut operational response time by 45%
  • Developed biometric authentication microservice
  • Improved access-control efficiency by 90%
Spring BootGoogle Maps APIBiometric AuthReal-time

Founder & Full-Stack Developer

Calz. Brander
Feb 2021 – Sep 2023
Cúcuta, Colombia
  • Built and maintained e-commerce platforms with Spring Boot
  • Served footwear retail businesses over a 2-year period
  • Full ownership of architecture, development, and deployment
Spring BootE-commerceFull-StackEntrepreneurship

Featured Projects

Production-grade systems built with modern architecture patterns

SciTrack

SciTrack

Scientific Research Ecosystem

Integrated platform with 4 modules: institutional metrics dashboard, semantic literature search with AI, academic writing assistant, and open data repository with interactive research map.

4 Integrated Modules
Multiple Research APIs
Claude AI Integration
MicroservicesAI IntegrationClaude API+3
SFAAS

SFAAS

Strangler Fig as a Service

Modular platform for progressive monolith-to-microservices migration with zero downtime. Intelligent gateway, shadow mode, feature flags, CDC with Debezium, and automated rollback.

5 Migration Phases
Zero Downtime
Automated Rollback
Spring Cloud GatewayKafkaDebezium+3
Mining Management API

Mining Management API

Environmental Monitoring System

3 microservices with Hexagonal Architecture: core management with S3 storage, IAM with JWT/RBAC, and event-driven audit/notifications. Full observability with Prometheus/Grafana.

3 Microservices
<250ms @ 500 VU
Full Stack
Spring BootKafkaMongoDB+5
Observability Lab

Observability Lab

Distributed Tracing & APM

Orchestrated Saga pattern with OpenTelemetry, Jaeger, Prometheus, Grafana, and Datadog. Structured logging with MDC, context propagation, and async Kafka flows.

End-to-End
Multi-Platform
Full Context
OpenTelemetryJaegerDatadog+4
Reactive Bootcamps

Reactive Bootcamps

WebFlux Microservices Suite

5 reactive microservices with Hexagonal Architecture for bootcamp enrollment. PostgreSQL + MongoDB with analytics reports.

5 Reactive Services
Sub-200ms p99
Hexagonal
Spring WebFluxReactiveHexagonal+2
Serverless EDA

Serverless EDA

Event-Driven Architecture

Hybrid EDA with AWS Lambda (Java/Node.js), DynamoDB, SQS, SNS. IaC with CloudFormation and Serverless Framework.

Multi-Runtime
Full Automation
Pay-per-Use
AWS LambdaDynamoDBSQS+3
Food Court Management

Food Court Management

Complete Microservices Solution

4 independent microservices: authentication, restaurant/menu management, order workflow, audit trail, and SMS notifications via Twilio.

4 Microservices
Hexagonal + API First
Real-time SMS
Spring BootPostgreSQLMongoDB+3
Project Master Cloud

Project Master Cloud

AWS Services Integration

Full CRUD with S3 storage, automatic thumbnails, SES email templates with Thymeleaf, and Cognito authentication. Hexagonal Architecture with 4 Maven modules.

3 AWS Services
21 REST APIs
4 Maven Modules
AWS S3AWS SESAWS Cognito+3

Technical Expertise

Modern backend stack for distributed systems

Backend
Java
Spring Boot
Spring WebFlux
Kotlin
TDD
Cloud & DevOps
AWS
Docker
GitHub Actions
CloudFormation
Serverless
Databases
PostgreSQL
MongoDB
MySQL
DynamoDB
Redis
Messaging
Apache Kafka
RabbitMQ
SQS
SNS
Observability
OpenTelemetry
Prometheus
Grafana
Datadog
Jaeger
Architecture
Hexagonal
Microservices
Event-Driven
API-First
Clean Code

Certifications & Training

Continuous learning and professional development

AWS Certified Solutions Architect – Associate

AWS Certified Solutions Architect – Associate

2025

AWS Cloud Architecting

AWS Cloud Architecting

2024

AWS Cloud Developing

AWS Cloud Developing

2024

Professional Training

Software Design and Architecture (2025)
Parallel, Concurrent & Distributed Programming in Java (2025)
Oracle Cloud Infrastructure Foundations I & II (2024)
Web Application Security (2025)
Exploiting & Securing Vulnerabilities in Java (2025)

Let's Build Something

Open to backend engineering opportunities and technical consulting

contact.sh

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