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ESPHome Engineer – Advanced Configuration & Device Integration

SMLIGHT develops cutting-edge smart home and IoT hardware, including Zigbee, Matter, and multi-radio hubs, smart LED controllers, and modular Wi-Fi devices.
Our devices run platforms such as ESPHome, Linux-based SMHUB-OS, SLZB-OS and custom firmware, ensuring flexibility, transparency, and integration with major ecosystems like Home Assistant.

We are now looking for an ESPHome Engineer — someone who lives and breathes YAML, understands the internals of ESPHome, and can transform complex hardware configurations into efficient, elegant, and maintainable firmware builds.

Responsibilities

  • Design and maintain ESPHome configurations (.yaml) for new and existing devices (Zigbee coordinators, LED controllers, IR transmitters, sensor modules, etc.)

  • Implement and optimize device logic, sensors, communication buses, and peripherals (UART, I²C, SPI, ADC, PWM, GPIO, etc.)

  • Develop modular and reusable YAML templates for product lines and internal projects

  • Ensure firmware compatibility across multiple hardware variants (ESP32, ESP32-S3, ESP32-C6, etc.)

  • Collaborate with hardware and firmware engineers to map pinouts, components, and features

  • Integrate device configuration with Home Assistant, MQTT, and API endpoints

  • Maintain clear structure, documentation, and versioning for all YAML builds

  • Test, debug, and validate configurations on physical hardware

  • Provide input for future hardware designs to improve ESPHome compatibility

Requirements

  • Proven experience with ESPHome (advanced YAML configuration, custom components, lambda usage)

  • Deep understanding of ESP32 / ESP8266 microcontrollers and hardware interfaces (UART, I²C, SPI, ADC, PWM, GPIO, etc.)

  • Knowledge of Home Assistant, MQTT, and related smart-home ecosystems

  • Experience debugging hardware-related issues (logs, compile errors, pin conflicts, etc.)

  • Strong skills in structuring and documenting ESPHome projects

  • Ability to work independently and propose improvements to hardware/firmware integration

  • Familiarity with electronics schematics, sensors, and peripheral modules

  • Basic knowledge of Python / C++ (for ESPHome custom components) is a plus

  • English proficiency for communication with the engineering team

Nice to have

  • Experience with Matter, Zigbee2MQTT, or Tasmota

  • Familiarity with Jinja templates and YAML modularization

  • Prior contributions to ESPHome community or public repositories

  • Experience working with LED controllers, IR devices, or multi-radio hubs

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