Embedded Software Engineer | Firmware Developer | IoT & Real-Time Systems Specialist

💼 Freelancer Profile: Embedded Software Engineer | Firmware Developer | IoT & Real-Time Systems Specialist
🔹 Overview

Hi! I’m a dedicated and experienced Embedded Software Developer with over 8 years of hands-on experience designing, developing, and debugging low-level systems for a variety of hardware platforms and industries.

I specialize in building high-performance, reliable, and resource-efficient firmware and embedded applications that run on microcontrollers, SoCs, and custom hardware. Whether you're developing an IoT product, industrial control system, or consumer electronics device, I bring the technical knowledge and problem-solving ability to deliver robust embedded solutions.

From bare-metal development to RTOS-based applications, my work focuses on optimizing performance, reducing power consumption, and ensuring long-term maintainability.

🧠 Core Expertise

⚙️ Embedded Systems Development

Bare-metal firmware design for ARM Cortex-M, AVR, PIC, and ESP32
RTOS integration: FreeRTOS, Zephyr, ThreadX, TI-RTOS
Low-level driver development (I2C, SPI, UART, CAN, USB, GPIO, PWM, ADC/DAC)
Board bring-up and peripheral interface implementation
Interrupt-driven and event-based architectures

🧩 Firmware & Hardware Integration

Reading datasheets and integrating with custom PCB designs
Bootloader development and over-the-air (OTA) update systems
Interfacing with sensors, displays, EEPROMs, and wireless modules
Cross-functional debugging using oscilloscopes, logic analyzers, and JTAG

🌐 IoT & Connectivity

Wi-Fi, BLE, Zigbee, LoRa, NB-IoT connectivity
Protocols: MQTT, CoAP, HTTP/HTTPS, Modbus, BACnet
Secure communication using TLS/SSL, X.509 certificates
Integration with AWS IoT, Azure IoT Hub, and Google Cloud IoT Core

🔒 Embedded Security & Optimization

Stack and heap memory analysis
Secure boot and firmware encryption
Compiler optimizations for speed, size, or power
Energy-efficient firmware design for battery-powered devices

🛠️ Development Tools & Technologies

Languages: C, C++, Embedded C, Python (for scripting & automation)
Microcontrollers: STM32, ESP32, nRF52, Atmel AVR, TI MSP430, Microchip PIC
IDEs & Toolchains: Keil MDK, IAR Embedded Workbench, STM32CubeIDE, MPLAB X, PlatformIO, Segger Embedded Studio
Build Systems: Make, CMake, SCons
Version Control: Git, GitHub, Bitbucket
Debugging Tools: J-Link, ST-Link, OpenOCD, GDB, UART logging
Protocols & Buses: I2C, SPI, UART, USB, CAN, LIN, RS485
OS & Middleware: FreeRTOS, Zephyr, CMSIS, lwIP, mbed OS
Testing: Unit testing (Unity, Ceedling), hardware-in-the-loop (HIL), CI/CD for embedded

📈 Industries & Application Areas

Consumer electronics (smart devices, wearables)
Industrial automation & robotics
Medical devices & healthcare monitors (compliant with IEC standards)
Automotive systems (CAN bus, ISO 26262 awareness)
Smart home & IoT products
Energy & environmental monitoring systems

🔍 Notable Projects

🔹 Smart Home Controller (ESP32 + FreeRTOS)

Developed the entire firmware stack for a smart lighting and HVAC controller with Wi-Fi and BLE connectivity. Features included OTA updates, MQTT cloud integration, local scheduling, and low-power operation for energy efficiency.
🔹 Industrial Sensor Gateway (STM32 + LoRa)

Designed firmware for an STM32-based industrial gateway aggregating data from multiple sensors via Modbus and transmitting to a LoRaWAN backend. Implemented watchdog, data buffering, and failsafe recovery for harsh environments.
🔹 Medical Wearable Device (nRF52832 + BLE)

Built real-time firmware for a Bluetooth-enabled wearable medical sensor. Ensured precise data sampling, BLE data streaming, and battery optimization. Complied with ISO 13485 software development lifecycle requirements.
🔹 Bootloader & Secure OTA (ARM Cortex-M4)

Implemented a dual-image bootloader with CRC checking and encrypted OTA update support over BLE and UART. Used AES-128 encryption and fail-safe mechanisms to prevent bricking during firmware upgrades.

🔧 Services I Offer

Firmware development from scratch (bare metal or RTOS)
Hardware interface driver development and board bring-up
Bootloader design and OTA update systems
IoT device firmware with cloud connectivity
Firmware optimization (memory, performance, energy)
Debugging and root cause analysis of embedded issues
Code refactoring, testing, and documentation for certification readiness

🎓 Education & Certifications

BSc in Electrical & Computer Engineering – [Your University Name]
Certified Embedded Systems Engineer – [Relevant Certifying Body]
Courses in Embedded Linux, RTOS Design, and ARM Architecture

✅ Why Choose Me?

✔ Deep Embedded Expertise: I’ve worked on a variety of platforms and tools, making me adaptable to virtually any embedded environment.
✔ Hardware-Aware Developer: I work closely with hardware engineers and am comfortable debugging both hardware and software-level issues.
✔ Reliable Delivery: I follow structured development practices with clear documentation, version control, and test coverage to ensure delivery of high-quality, maintainable code.
✔ Problem Solver: Whether it’s intermittent bugs, memory overflows, or real-time constraints, I thrive on solving complex embedded challenges.
✔ Flexible Engagement: Available for short-term development, long-term maintenance, or consulting roles. Comfortable working with startups, R&D teams, or as a solo contributor.
📬 Let’s Collaborate

If you need an embedded systems developer who delivers reliable, real-time, and resource-conscious firmware, I’d love to hear more about your project.

Whether you’re in early prototyping, scaling production firmware, or stuck with a critical issue — I’m here to help you move forward with confidence.

Message me today to get started or schedule a free initial consultation.

Let me know if you'd like this tailored to a specific microcontroller family, project type (e.g., medical, automotive), or platform (Upwork, Freelancer, Fiverr).