Leonardo Teixeira

Senior backend-focused full-stack engineer based in Brazil. I build reliable products end to end with Go, .NET and TypeScript.

I build systems that stay reliable under pressure.

I work across domain modeling, APIs, data, messaging and modern web interfaces.

I care about modular design, explicit contracts, idempotent workflows and observable systems.

I use AI on both sides of the work: coding agents steered by specifications to build software, and LLMs, retrieval and agent workflows as parts of the product.

What is on board

These are the technologies and techniques I work with. Pick one to see which projects carry it.

Backend

Web

Data and messaging

Architecture and delivery

AI-assisted engineering

AI-powered solutions

Nothing selected

Stops on the route

Explore the product, main flow and architecture of each project. Demo and source availability are listed individually.

Advisor Radar

A reference platform for financial advisory workflows. It turns client signals into triage, cases, timelines and advisor experiences.

Built with

  • Go
  • React
  • TypeScript
  • PostgreSQL
  • RabbitMQ
  • gRPC
  • OpenTelemetry
  • Transactional outbox
  • Event-driven workflows
  • Jev decision model
  • LLM integrations
  • Coding agents
  • Spec-driven development
  • Agent skills

Open Source Project Intelligence

An evolving platform that turns repository activity into evidence about project health, momentum, sustainability and abandonment risk.

Built with

  • Go
  • React
  • TypeScript
  • PostgreSQL
  • NATS
  • Transactional outbox
  • OpenAPI
  • OpenTelemetry
  • Modular systems
  • Google ADK
  • RAG
  • LLM integrations
  • Coding agents
  • Spec-driven development
  • Agent skills

Real Estate Intelligence

A market intelligence layer over public real estate data. It answers questions about price per square meter, appreciation by region, price drops and stale listings.

Built with

  • Node.js
  • TypeScript
  • React
  • PostgreSQL
  • LangGraph
  • LLM integrations
  • Modular systems
  • OpenTelemetry
  • Coding agents
  • Spec-driven development
  • Agent skills

Cybersecurity Intelligence

A vulnerability intelligence project connecting technology profiles to explainable advisory findings with deterministic version matching and risk scoring.

Built with

  • .NET / C#
  • React
  • TypeScript
  • PostgreSQL
  • OpenTelemetry
  • Modular systems
  • Coding agents
  • Spec-driven development
  • Agent skills
Explore projectHosting soonSource · Coming soon

Open to remote roles.

I am open to conversations with teams building ambitious products across backend, web and platform concerns.