IoT / Embedded Connectivity Engineer (TCU Development)

Facomsa; Lliçà de Vall; On-site; EUR 42,000 - 56,000; Full time

Job summary

Facomsa is expanding its R&D Connectivity team in Spain to develop a next-generation Telematics Control Unit (TCU). You will work on end-to-end firmware for embedded MCUs, connecting vehicles to the cloud over 4G/5G, with secure OTA updates and ISO/SAE 21434 alignment.

Responsibilities include implementing MQTT communication, CAN bus data acquisition, and secure boot/certs, while collaborating with Hardware, Software and Validation teams to bring innovative mobility solutions to market.

Qualifications

• Degree in Telecommunications or related technical field.
• Solid C programming for embedded systems.
• Knowledge of MQTT, TCP/IP, HTTP/REST; basic cybersecurity concepts.
• Familiarity with CAN bus and automotive networks.

Responsibilities

• Develop TCU firmware in C for automotive MCUs.
• Implement cloud integration using MQTT and AWS IoT SDK.
• Integrate CAN bus to collect data from ECUs.
• Design secure firmware update mechanisms (FOTA) per ISO 24089.
• Collaborate with hardware, software, and validation teams.

Skills

C programming

IoT protocols

CAN bus

Cybersecurity basics

Self-starter

Education

Engineering degree in Telecommunications / Computer Science / Electronics

Tools

MQTT

AWS IoT Core

FOTA concepts

Job description

Currently, Facomsa is expanding its R&D Connectivity department with 1 IoT Embedded Engineer.

Our primary mission is to take two-wheeler and four-wheeler intelligence to the next level. You will be directly involved in the end-to-end development of our next-generation Telematics Control Unit (TCU), connecting vehicles to the cloud using 4G / 5G, secure IoT protocols (MQTT, AWS IoT Core), FOTA (Firmware Over-The-Air), and CAN bus.

As connected vehicles require robust protection against cyber threats, you will also play a key role in developing secure-by-design firmware aligned with modern automotive cybersecurity and software update standards (ISO/SAE 21434 and ISO 24089).

What you'll be doing:

• Develop TCU firmware: Write, test, and maintain robust embedded software in C for automotive microcontrollers and connectivity modules.
• Cloud & Telematics Integration: Implement cloud communication using MQTT and the AWS IoT SDK to stream real-time vehicle telemetry, alerts, and diagnostics.
• In-Vehicle Networking: Integrate CAN bus communications to acquire data from vehicle ECUs, sensors, and instrument clusters.
• Secure FOTA Updates (ISO 24089): Help design and implement reliable, fail-safe Firmware Over-The-Air (FOTA) update mechanisms compliant with ISO 24089:2023.
• Embedded Cybersecurity (ISO/SAE 21434): Implement security features such as secure boot, TLS/crypto libraries, certificate management, and data encryption following ISO/SAE 21434:2021 guidelines.
• Cellular Integration: Work with cellular modem modules (4G LTE, evaluating 5G modules).
• Collaborative R&D: Collaborate closely with the Hardware, Software, and Validation teams to bring innovative connectivity solutions to market.

Requirements:

• Education: Degree in Telecommunications Engineering, Computer Science, Electronics, or a related technical field.
• Programming: Solid foundation in C for embedded systems / microcontrollers.
• IoT Protocols & Security Basics: Basic understanding of IoT protocols (e.g., MQTT, TCP/IP, HTTP/REST) and fundamental cybersecurity concepts (TLS/SSL, symmetric/asymmetric encryption, digital signatures).
• Automotive Networks: Familiarity with or understanding of CAN bus communication.
• Mindset: Self-starter, quick learner, security-conscious, and passionate about solving complex engineering challenges.

Nice-to-have Skills:

• Experience with AWS IoT SDK / AWS IoT Core and device provisioning/certificates.
• Experience or exposure to bootloader design, dual-bank memory architectures, and FOTA implementations.
• Experience integrating cellular modems (AT commands, 4G/LTE Cat-M1/NB-IoT, or 5G).
• Experience with Secure Elements, Hardware Security Modules (HSM), or crypto hardware acceleration.
• Familiarity with automotive cybersecurity standards (ISO/SAE 21434:2021) and software update engineering (ISO 24089:2023).
• Familiarity with hardware/bus debugging tools (CANoe, PCAN, Oscilloscopes, Logic Analyzers).

Experience:

• 2 to 3 years of experience in embedded systems or IoT development.
• We understand that you cannot be a master of every standard or technology right away. If you have solid fundamentals and passion for IoT, cybersecurity, and connected mobility, you will learn and grow with us!

Conditions:

• Schedule: 40 hours per week with a flexible working schedule