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JonathanCristovao/README.md

🙂 Hi, I’m Jonathan

I’m a technology enthusiast with a focus on Artificial Intelligence (AI), DevOps, and Data Science. With a strong drive for innovation, I’m passionate about building impactful, real-world solutions using cutting-edge technologies. I’m constantly seeking to expand my skill set and collaborate on projects that push the boundaries of what’s possible in the digital world.


📄 Scientific Publications

I am an active researcher in the field of AI, with a focus on Human Activity Recognition (HAR), Agriculture 4.0, and Generative Models using GANs and LLMs.

🔗 See all my publications on Google Scholar

Highlights:

  • An Approach for Data Augmentation in HAR with Wearable Sensors Using TIMEGAN ICML 2024 (Miami, USA) — Focuses on generating realistic synthetic data from wearable sensors using TimeGAN.

  • Using Mobile Edge AI to Detect and Map Diseases in Citrus Orchards International Journal — A systematic study of DL architectures applied to disease detection and fruit counting in orchards.


🧩 LLMs & NLP

  • Prompt Engineering & Chatbots (OpenAI, Hugging Face, Ollama)
  • Fine-tuning with LoRA / QLoRA
  • RAG (Retrieval-Augmented Generation)
  • Embedding Models & Vector Databases (FAISS, Chroma, Weaviate)
  • Model Serving (FastAPI, LangChain, Docker, MLflow)
  • LLMs used: LLaMA, Gemma, GPT, Mistral, Phi, DeepSeek, Mixtral, Command-R, BloomZ, Qwen

🎨 Diffusion Models & Generative AI

  • Stable Diffusion (text-to-image, inpainting, img2img, ControlNet, LoRA support)

  • ComfyUI: Custom pipeline design, workflow automation, model chaining

  • Hugging Face Diffusers: Deployment and experimentation with pretrained models

  • DreamBooth & LoRA: Fine-tuning for personalized generation

  • Leonardo.AI & DALL·E 3 API: API-based content generation (posters, ads, etc.)

  • Prompt Engineering for Visual Content: Tailored prompts for marketing, branding and storytelling

  • Post-processing Tools: Seamless pipelines with upscalers, attention masking, aesthetic scoring, and alucination detection

  • Model Management: .safetensors, .ckpt, .onnx model optimization and conversion


🤖 Machine Learning

  • Supervised & Unsupervised Learning
  • Regression & Classification
  • Time Series Forecasting
  • Recommender Systems
  • Model Evaluation & Feature Selection

🧠 Deep Learning

  • Artificial Neural Networks (ANN)
  • Convolutional Neural Networks (CNN)
  • Computer Vision with TensorFlow & PyTorch

📊 Data Analytics

Google Analytics Tableau Power BI Excel


🧪 Python Libraries for Data Analysis


📈 Capabilities

  • Data Wrangling & Cleaning
  • Exploratory Data Analysis (EDA)
  • Statistical Analysis & Hypothesis Testing
  • Visual Dashboards & Storytelling
  • Reporting Automation with Power BI / Streamlit / Tableau

🚀 MLOps & Model Deployment

Bringing machine learning models to production with reliability, automation, and scalability.

🔧 Tools & Frameworks


⚙️ Key Skills & Practices

  • Model versioning & registry (MLflow, DVC)
  • Experiment tracking and parameter logging
  • REST API deployment (FastAPI + Docker)
  • Monitoring & Logging (Prometheus, Grafana, Kibana)
  • CI/CD pipelines (GitHub Actions, CircleCI)
  • Container orchestration (Kubernetes, Docker Compose)
  • Workflow automation (Apache Airflow)
  • Secure API scaling with NGINX + token-based auth
  • Microservices architecture for modular AI services

⚙️ Embedded Systems

Building smart edge solutions by combining AI with embedded hardware.

🔩 Hardware Platforms

  • NVIDIA Jetson Nano – AI edge computing with GPU acceleration
  • ESP32 / ESP32-C3 – Low-power microcontrollers with Wi-Fi + BLE
  • Arduino – Prototyping with C/C++ and sensor integration
  • Raspberry Pi – Full-stack embedded Linux systems for IoT and automation
  • Sipeed M1 / M1s Dock – RISC-V microcontroller with AI co-processor (Kendryte K210)

🔌 Applications

  • Real-time sensor data collection
  • Edge AI for activity recognition (HAR)
  • IoT integration with mobile apps (Flutter + BLE)
  • Offline AI inference with optimized models

🛠️ Languages & Tools

C C++ Python TypeScript Dart Docker Git OpenCV VSCode FastAPI Flask MySQL Apache Spark Postman Streamlit DBeaver

📫 Let's Connect

LinkedIn


Popular repositories Loading

  1. Bootcamp-Unimed-BH-Ciencia-de-Dados-DiO Bootcamp-Unimed-BH-Ciencia-de-Dados-DiO Public

    Este repositório é destinado para os projetos e desafios desenvolvido no bootcamp Unimed-BH Ciência de Dados.

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  2. Human-Activity-Recognition-HAR-LSTM Human-Activity-Recognition-HAR-LSTM Public

    This repository have a deep learning model to walking activity recognition with data collected by wearable sensors.

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  3. clustering-consumers clustering-consumers Public

    clustering of electricity consumers

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  4. JonathanCristovao JonathanCristovao Public

  5. Multi-class-image-classification-mobilenet Multi-class-image-classification-mobilenet Public

    Multi image classification of orange diseases to running in edge device

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  6. Portfolio Portfolio Public

    Neste portifólio encontra-se alguns dos meus projetos.