Dmitrii S.

10+ years developing embedded systems and system-level software - from RTOS firmware to complete IoT products. Author of Tendry Lab - open-source platform (firmware, CI, data infrastructure, UI) for environmental scientists and early-stage hardware startups who need to bootstrap product development without deep embedded expertise. See the portfolio items for more details: control-components, ci-components, device-hub, device-ui. Recent work: Built patented WiFi mesh system for industrial hydrogen devices. Led firmware teams through CE certification and mass production. ESP32 Firmware Development: - 6+ years commercial experience - Collaborated with Espressif on WiFi Mesh, BLE, and NVS improvements - Deep expertise in resource-constrained environments and real-time systems Core technology stack: - Programming Languages: C, C++17/C++20, Python - Platforms: ESP32, STM32, FreeRTOS, Linux/POSIX - Hardware Design: PCB design (KiCad), component selection, bring-up, JLCPCB manufacturing - Communication Protocols: TCP/IP, UART/SPI/I2C, Modbus, MQTT, BLE Open to: firmware development, driver work, protocol implementation, IoT products, system software.