
Esther
Embedded Systems And Firmware Engineer
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Embedded Systems Engineer
Fiverr • Freelance
May 2019 - Present • 7 yrs 4 mos
As a freelance Embedded Systems Engineer, I develop and troubleshoot embedded solutions for clients across IoT, automation, electronics, and hardware projects. My work includes ESP32 and STM32 firmware development, embedded C programming, sensor integration, wireless communication, peripheral configuration, hardware interfacing, debugging, and system testing. I work with platforms and tools including Arduino, ESP-IDF, STM32CubeIDE, STM32CubeMX, and FreeRTOS. I develop solutions involving WiFi, Bluetooth/BLE, MQTT, UART, I2C, SPI, CAN, GPIO, ADC, PWM, timers, and other common embedded interfaces and peripherals. I also assist with PCB-related projects, component and peripheral integration, firmware-hardware communication, prototype development, troubleshooting, and improving existing embedded systems. My projects range from individual modules and firmware features to complete embedded prototypes that combine hardware and software. Through freelance projects, I focus on understanding client requirements, selecting practical technical approaches, writing maintainable firmware, testing functionality, identifying and resolving issues, and delivering clear project files and documentation. My goal is to help clients turn embedded and electronics ideas into reliable working prototypes and practical products while maintaining clear communication throughout the development process.