# Leandro César

Tech Lead & Engineer

Backend · AI · Automation

## About

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.

## Contact

Email: ccleandroc@gmail.com

## Experience

### [Cloudia](https://www.cloudia.com.br/)

**Tech Lead** · Feb 2022 - 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.

**Software Developer** · Jun 2021 - Feb 2022

**Software Development Intern** · Jan 2021 - Jun 2021

### [BASF](https://www.basf.com/br/pt)

**Consultant (Apprentice)** · Aug 2019 - Nov 2019

### [UNIFEI (Federal University of Itajubá)](https://unifei.edu.br/)

**Research Scholarship (Physics Laboratory)** · Jul 2019 - Nov 2019

### [Ball Corporation](https://www.ball.com/sa)

**Consultant (Apprentice)** · Mar 2019 - Jun 2019

### [Ex Machina](https://proex.unifei.edu.br/extensao-tecnologica-e-empresarial/competicao-tecnologica/ex-machina/)

**Technical Director** · Jul 2018 - May 2019

**Programming Director** · Jul 2017 - Jul 2018

**Programmer** · Mar 2017 - Jul 2017

## Education

### [UNIFEI (Federal University of Itajubá)](https://unifei.edu.br/)

**Degree in Control and Automation Engineering** · Jan 2016 - Dec 2020

## Languages

- Portuguese - Native

- English - Advanced

## Projects

### [themoviedb](https://pypi.org/project/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](https://github.com/leandcesar/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](https://enhancer-for-letterboxd.vercel.app/)

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](https://onthisday.watch/)

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

## Expertise

### 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

## Volunteering

### [Bota Pra Fazer UNIFEI 2018](https://www.instagram.com/botaprafazerunifei/)

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](https://www.instagram.com/botaprafazerunifei/)

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.

## Links

- [Email](mailto:ccleandroc@gmail.com)
- [LinkedIn](https://linkedin.com/in/leandcesar)
- [Github](https://github.com/leandcesar)
- [Instagram](https://instagram.com/leandcesar)
- [X](https://x.com/leandcesar)