Job Title: Senior Embedded Firmware Engineer – IoT

Company Name: Techno Global

Job Url: https://www.glassdoor.com/job-listing/senior-embedded-firmware-engineer-iot-nordic-nrf-zephyr-rtos-techno-global-JV_KO0,60_KE61,74.htm?jl=1010065587234&src=GD_JOB_AD&uido=8F81817D7E4D6DD58197A01932B37671&ao=1136043&jrtk=5-yul1-0-1jjrjkgftia6o805-2191db11da1883ef&cs=1_e90b7e51&s=58&t=SR&pos=104&guid=0000019cf73a41a1bd9b78958fb9e951&jobListingId=1010065587234&ea=1&vt=w&cb=1773674316601&ctt=1773674331778

Job Description: Senior Embedded Firmware Engineer – IoT (Nordic nRF / Zephyr RTOS)

Remote
$20.00 - $100.00 Per Hour (Employer provided)

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Your qualifications for this job

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Version control
Internet of Things
Firmware
Embedded systems
Git
SDKs
RTOS
Debugging
C
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4G/LTE


Universal asynchronous receiver-transmitter (UART) protocol


Key management


Microcontrollers

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FIRMWARE Essential Knowledge

Development Platform

Programming in C/C++ for microcontrollers (ARM Cortex-M33 in the case of the nRF9151).

Use of the nRF Connect SDK (based on Zephyr RTOS) for the nRF9151, including:

Devicetree configuration
Kconfig configuration
RTOS management: tasks, queues, semaphores, and power management (PSM, eDRX for LTE)
Protocols and Connectivity

Implementation of stacks such as:

MQTT
CoAP
HTTPS over LTE-M / NB-IoT
Use of TLS / DTLS and certificates for secure communication (Secure Socket API of the nRF9151).

Bus communication protocols:

SPI
I2C
UART
PDM
PWM
(all available in the nRF9151)

LoRa / LoRaWAN protocol for the LoRa1278-C1 module.

Power Management

Optimization of power consumption for IoT devices: implementation of PSM (Power Saving Mode), eDRX, and wake/sleep cycles.

The nRF9151 can reach as low as 2.7 µA in PSM, therefore the firmware must properly take advantage of this capability.

Debugging and Tools

Use of SWD + J-Link / nRF9160 DK for flashing and debugging.

Analysis with:

ITM
ETM
DWT
(available in Cortex-M33)

Basic CI/CD, version control using Git.

Management of OTA (firmware update over-the-air) for deployments in the field.

Embedded Security

Use of Arm TrustZone and Arm CryptoCell-310 (present in the nRF9151) for:

Secure boot
Key storage
Secure communications
Please indicate:

What experience do you have in PCB board design using Nordic chips?
If you have used the C programming language, in what type of project did you use it?
What work have you done with Zephyr RTOS?
Finally, please confirm whether you have experience or at least a working knowledge of the topics described above.

Pay: $20.00 - $100.00 per hour

Work Location: Remote