Hi there, I’m Jose Martel 👋
🚀 Firmware Engineer | Embedded Systems | IoT Architect
📍 São Paulo, Brazil
👨💻 About Me
Firmware Engineer with 4+ years of experience building embedded systems from low-level drivers to cloud-connected IoT platforms. I specialize in designing scalable firmware architectures, integrating hardware and software, and delivering real-world solutions for industrial and connected devices.
My work focuses on:
- 🔄 Transformation: Turning legacy hardware into scalable, connected systems.
- 📡 Connectivity: Building robust communication pipelines from edge to cloud.
- 🏗️ Architecture: Designing modular architectures that reduce development time and increase code reuse.
🛠️ What I Do
- 💻 Embedded Systems: Development in Bare Metal & RTOS.
- 📐 Firmware Architecture: Designing for scalable device portfolios.
- 📶 Wireless Connectivity: WiFi, 2G/4G, Bluetooth, LPWAN.
- 🔌 Data Acquisition: UART, SPI, I2C, I2S, Modbus.
- 🌐 IoT & Edge Computing: Designing IoT Gateways (Embedded Linux).
- 🔁 End-to-End Systems: Complete flow from Device → Gateway → Cloud.
🏆 Key Achievements
- 📈 Led firmware architecture for a portfolio of 12+ devices, enabling modular and scalable development.
- ⏱️ Reduced development time by 20% through a reusable firmware architecture.
- 🧠 Designed a dual-MCU system with inter-processor communication (ESP32 + ARM Cortex-M0+).
- ⚙️ Built a custom bootloader for RP2040 with UART + OTA (Over-The-Air) support.
- ☁️ Developed an IoT Gateway handling 60+ devices over Wi-SUN (CoAP).
- 🧩 Implemented an event-driven microservices architecture for data pipelines (Python + NNG + SQLite/SurrealDB).
- 🔋 Optimized low-power systems, increasing device lifetime by 20%.
📁 Selected Work
🏭 IoT Gateway (Edge Computing)
Embedded Linux system for industrial data collection.
- Handles 60+ wireless devices.
- Local processing combined with cloud synchronization.
- Resilient architecture designed for intermittent connectivity.
Scalable architecture for multi-device portfolios.
- Plug-and-play sensor modules.
- Extensive cross-device code reuse.
🔄 Custom Bootloader System
Dual-stage update system.
- Supports UART + OTA updates.
- External MCU-assisted updates.
🧠 Engineering Approach
- 🌐 System-level thinking: Beyond just firmware.
- 🏗️ Design for the future: Strong focus on scalability and maintainability.
- 🤝 Synergy: Hardware-software product co-design.
- ⚡ Efficiency: Performance and power optimization.
- 🌍 Real-world focus: Prioritizing constraints like connectivity, reliability, and deployment.
🎯 Current Focus
- 🚀 Building technology with real-world impact.
- 🏭 Developing IoT platforms and data-driven systems for modern industry.
- 🛰️ Exploring and building Edge computing architectures.
💻 Tech Stack
🧑💻 Languages
C/C++ | Python
🔩 Embedded
ESP32 | STM32 | RP2040 | CC1352 | FreeRTOS | Bare Metal | CMSIS
📡 Protocols & Connectivity
UART | SPI | I2C | I2S | Modbus | WiFi | Bluetooth | 2G/4G | HTTP | AMQP | CoAP
Embedded Linux | Git | CMake | JTAG | KiCad | Altium
☁️ Cloud & Architecture
Microservices | Event-driven systems | OAuth 2.0 | RabbitMQ
📫 Let’s Connect!
⭐️ Feel free to reach out if you’d like to collaborate or just chat about embedded tech!