Full-Stack Engineer focused on building scalable backend systems, distributed architectures, and AI-powered applications.
I design and deliver production-ready software, from frontend architecture to microservices and real-time systems.
Currently focused on Node.js ecosystem, distributed systems, Go, and AI integration (LLMs & RAG).
- Backend: Node.js, NestJS, Express, Fastify, .NET, Go
- Frontend: React, Next.js, TanStack Start, TypeScript
- Databases: PostgreSQL, MongoDB, Redis
- Messaging & Real-Time: RabbitMQ, WebSockets
- AI & Data: LLM Integration, RAG Pipelines, Vector Search, Observability
- DevOps: Docker, Docker Compose, AWS
- Architecture: Microservices, REST APIs, Event-Driven Systems
Node.js, NestJS, PostgreSQL, RabbitMQ, WebSockets, Docker
A full-stack task management platform built using a microservices architecture.
- API Gateway + independently deployable services
- JWT authentication
- Asynchronous communication with RabbitMQ
- Real-time updates via WebSockets
- Dockerized multi-service environment
- Reduced local setup complexity by ~70%
This project demonstrates distributed systems design, service isolation, and scalable backend architecture.
👉 Repository: https://github.com/colmanluiz/task-management
Node.js, TypeScript, OpenAI, Kafka, MongoDB
An end-to-end Retrieval-Augmented Generation (RAG) pipeline.
- Kafka-based ingestion pipeline
- LLM-based data cleaning and transformation
- Vector storage + semantic search
- Token streaming API
- Observability with Langfuse
- Sub-500ms optimized latency
Focus: applied AI engineering, cost optimization, and production-level RAG pipelines.
👉 Repository: https://github.com/colmanluiz/news-article-agent
Go, Goroutines, Channels
A high-performance concurrent event processing system.
- Parallel execution with goroutines
- Channel-based synchronization
- Thread-safe processing
- REST exposure layer
- Focus on concurrency primitives and memory efficiency
Designed to deepen understanding of Go concurrency and system-level thinking.
👉 Repository: https://github.com/colmanluiz/go-event-counter
Next.js, Node.js, Spotify API, YouTube API
A full-stack web application that converts playlists across streaming platforms.
- OAuth authentication
- External API integrations
- Playlist matching & recreation
- Clean UX-focused interface
Demonstrates product thinking and API-driven architecture.
👉 Repository: https://github.com/colmanluiz/tunesync
I’ve worked on:
- A large-scale education platform built from scratch in 2 months (15,000+ active users)
- AI-powered lead qualification systems (60% adoption, 70% reduction in manual workload)
- Learning platforms serving 5M+ users
I care about:
- Clean architecture
- Scalable backend systems
- Measurable business impact
- Real-world AI integration
- LinkedIn: https://linkedin.com/in/luiz-henrique-colman-6a04bb257
- Portfolio: https://colman.dev.br
- Email: colmanluizz@gmail.com
Always building. Always optimizing. Always learning.