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Leandro César

Tech Lead & Engineer

BackendAIAutomation

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Leandro César

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I'm a Tech Lead and backend engineer. I lead teams without stepping away from implementation. I work with AI, automation, and systems for conversational applications, from architecture to production. I especially enjoy reducing costs and optimizing performance — curious, considering I chose Python as my main language.

  1. Cloudia

    1. Tech Lead

      — Present

      I lead a team of 6 developers, managing priorities, delivery, and technical execution while contributing to product and architecture decisions. I develop an AI-powered chatbot for WhatsApp, Facebook, and Instagram, integrated with 30+ scheduling APIs. I own AWS infrastructure, CI/CD, automations, internal tools, code quality, observability, and performance optimization.

    2. Software Developer

      —

    3. Software Development Intern

      —

  2. BASF

    1. Consultant (Apprentice)

      —

  3. UNIFEI (Federal University of Itajubá)

    1. Research Scholarship (Physics Laboratory)

      —

  4. Ball Corporation

    1. Consultant (Apprentice)

      —

  5. Ex Machina

    1. Technical Director

      —

    2. Programming Director

      —

    3. Programmer

      —

UNIFEI (Federal University of Itajubá)

Degree in Control and Automation Engineering

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  • Portuguese - Native
  • English - Advanced

themoviedb

Typed Python client for the TMDb API with synchronous and asynchronous interfaces. Distributed on PyPI for movie and TV metadata across Python 3.8-3.14.

PeakDetection

Real-time peak detection for noisy sensor data on Arduino. Z-score analysis with moving averages for signal processing on resource-constrained hardware.

Enhancer for Letterboxd

Browser extension that turns Letterboxd into a richer analysis and discovery tool. Filtering, rating analytics, viewing statistics, and film discovery for power users.

onthisday.watch

Date-driven movie discovery for answering “What should I watch today?”. Uses the current day to surface relevant film recommendations.

Backend

  • Python
  • FastAPI
  • Flask
  • SQLAlchemy
  • REST
  • GraphQL
  • JavaScript
  • Golang

AI & Automation

  • Chatbots
  • LLMs
  • RAG
  • LangChain
  • LiteLLM
  • OpenRouter
  • n8n
  • Make

Cloud & Infrastructure

  • AWS (ECS, EC2, Lambda, RDS, S3, SQS)
  • Docker
  • Git
  • GitHub Actions
  • CI/CD

Data & Messaging

  • MariaDB
  • MySQL
  • PostgreSQL
  • Redis
  • RabbitMQ
  • AmazonMQ
  • MongoDB

Bota Pra Fazer UNIFEI 2018

Co-created an organic garden at Lar da Providência de Itajubá to support the institution in growing food for older residents.

Bota Pra Fazer UNIFEI 2017

Developed a math game for children at APAE de Itajubá to support learning of the positional decimal number system. The initiative won 1st place in the Innovation and Creativity category.