Recruitment

• Embedded Linux Platform Engineer – IoT / Smart Hub
• ESPHome Engineer – Advanced Configuration & Device Integration

Embedded Linux Platform Engineer – IoT / Smart Hub

The company is developing its own Linux-based platform for smart hubs and IoT devices SMHUB-OS - an example of device running that platform is here: https://smlight.tech/global/smhub.
The system combines an embedded Linux core, backend services, and a web interface (frontend), providing centralized management of device networks, network configuration, radio modules, and integrations.
The architecture supports network stacks (Ethernet, Wi-Fi, 4G/LTE), OTA updates, and app installations (such as Node-RED, Zigbee2MQTT, etc.), as well as work with peripheral modules (IR transmitter and receiver, audio subsystem, buzzer, addressable LED strips, SD card, USB, UART/I2C buses, and others) and in future - cloud sync/control system.

We are looking for an engineer to participate in the development and maintenance of the SMHUB-OS core system, backend logic, and integration with the frontend (React/WebSocket).

What will you do

• Develop and maintain a Linux platform for embedded devices (RISC-V SoC)

• Integrate system modules (Ethernet, Wi-Fi, 4G/LTE, radio modules, GPIO, USB, Wi-Fi, IR transmitter/receiver, UART, I2C, etc.)

• Configure U-Boot, rootfs, and partition logic (RAUC, read-only rootfs, user data)

• Develop backend services (Python / FastAPI, possibly C/C++) for managing configuration, telemetry, and device status

• Integrate system services (NetworkManager, ModemManager, WireGuard, systemd, MQTT)

• Interact with the frontend via WebSocket JSON API (a dedicated frontend engineer works on this part)

• Build a secure architecture with privilege separation between the web interface and system services

• Implement and maintain OTA update and system recovery mechanisms

• Debug drivers, startup scripts, and interfaces (UART, I²C, SPI, USB)

• Prepare technical documentation and participate in system architecture design

Technologies used

• Linux kernel, U-Boot

• Python (FastAPI), Bash, systemd

• SQLite / JSON for configurations

• RAUC / OTA updates

• Collaboration with ReactJS frontend

• Additional experience with Zigbee2MQTT, Node-RED, Matterbridge, Z-WaveJS is a plus

Requirements

• Experience with Embedded Linux / SBC (Single Board Computers, RISC-V architecture preferrable)

• Understanding of Linux kernel, drivers, bootloaders, and device tree

• Experience building backend services (FastAPI)

• Knowledge of network stacks (Ethernet, Wi-Fi, LTE, VPN)

• Ability to analyze system logs (dmesg, journalctl, strace)

• Understanding of system security and privilege separation principles

• Experience integrating frontend via WebSocket or REST API

• Self-organization, attention to architecture and stability

• English proficiency for communication with the engineering team

• Preferably, experience in IoT / Smart Home / Automation

Please submit your application by this link: https://forms.gle/9L749uaUPRCLeP2n6 

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.

What will you do

• 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, 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

Please submit your application by this link:  https://forms.gle/gUeGaQVb6kpeoyjb9