Senior Embedded Firmware Engineer
EER Poland
Senior Embedded / Firmware Engineer
(RTOS, communication, critical systems, secure embedded systems)
Scope of Duties
This is not a typical embedded role. It involves designing systems, deterministic communication, real-time, and responsibility for key product elements.
You will work from low-level firmware to backend communication.
In practice this means:
- Development of firmware for security components and communication modules
- Designing and improving communication between two MCUs
- Working with real-time logic, state machines, and error handling
- Creating and maintaining hardware drivers (UART, SPI, I2C, GPIO)
- Designing and developing wireless communication systems (BLE onboarding, provisioning, data exchange)
- Ensuring stable communication with the backend through OCPP over WebSocket (or similar device-cloud protocols)
- Working on OTA and system resilience in the production environment (rollback, recovery, update security)
- Low-level debugging using professional tools (JTAG, SWD, logic analyzers, etc.)
- Designing APIs and communication layers between system modules
Technology and Architecture
The system consists of two main units:
- Security/power controller: nRF5340 or similar low-power MCU (RTOS/embedded firmware)
- Communication/application controller: i.MX RT1061 or similar application-grade MCU (RTOS/embedded Linux optional)
MCUs communicate through a proprietary protocol designed for determinism and consistency.
Communication with the backend is realized based on OCPP over WebSocket or a similar device-cloud protocol.
Requirements
- Very good knowledge of C/C++ in embedded systems
- Experience working with MCUs (e.g., STM32, nRF, ESP32, or similar)
- Knowledge of communication protocols: UART, SPI, I2C, and BLE (or other wireless)
- Experience in designing embedded systems (architecture, not just implementation)
- Ability to debug HW/SW systems (JTAG, SWD, system logs)
- Experience in designing interfaces and APIs between system components
Highly Desired
- Experience in secure embedded systems (device identity, secure update concepts, integrity, tamper resistance)
- Experience with OTA/bootloaders (rollback, recovery, update safety)
- Knowledge of RTOS systems (FreeRTOS, Zephyr, or others)
- Experience with device ↔ backend communication (WebSocket, MQTT, REST)
- Automotive/industrial embedded background
- Knowledge of provisioning systems/fleet management/BLE onboarding
Nice-to-Have (but not required)
- Experience with OCPP
- Zephyr RTOS
- Embedded Linux (Buildroot/Yocto)
Working Conditions
- 100% remote work - you can work from anywhere
- B2B: up to 8,000 EUR net per month
- Flexible working hours
- Collaboration with an experienced system/firmware team
- Real impact on the architecture and product development direction
Vacancy posted 2 days ago
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