Embedded C Development Engineer - Radio Protocols (M/F)

Project overview

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🏠 2 days of remote work / week - 📍 Lyon (69) - Villeurbanne - 🛠 Minimum 5 years of experience

Developing a radio protocol, optimizing communication between embedded equipment, and intervening up to hardware debugging: this is the core of this mission.

We are currently looking for an Embedded C Development Engineer – Radio Protocols to work with one of our clients on fire detection systems.

You will work on the evolution of a radio protocol, low-level driver development, and the integration of communications between control panels and detectors.

A position that combines embedded C development, radio expertise, performance optimization, and technical responsibilities for a software component.

Your missions: from radio protocol to target integration

You will be involved in the entire development cycle of the radio component, from specifications to testing and releases.

1/ Radio development and integration

2/ Optimization and diagnostics

3/ Testing and software quality

4/ Technical referent for the radio component

Beyond development, you will be responsible for the technical monitoring of the component:

The technical environment

You will work on real-time embedded systems, with strong constraints on radio communication and energy consumption.

• Implement evolutions of the fire radio protocol, particularly security mechanisms related to the CRA (Cyber Resilience Act).
• Analyze RF engineer specifications and assess their software feasibility.
• Specify the D24 RaIL and ensure its convergence with the Alpha component's radio interface.
• Develop the logical layer of the Silicon Labs SI4461 driver and integrate the radio component on control panels (U5) and detectors (U3).
• Optimize timings, radio communication times, and energy consumption per exchange.
• Analyze communication failures and identify their root causes, including through hardware debugging.
• Work on the reliability of radio exchanges between equipment.
• Set up unit tests, non-regression tests, and bench protocol tests.
• Perform cross-tests between control panels and detectors.
• Set up continuous integration (CI) for the radio component.
• Perform reviews and validations of Pull Requests with the deputy referent.
• Manage versions and releases.
• Document technical choices and ensure their traceability.
• Contribute to the CRA compliance file.
• Share your knowledge and support technical transfer within the team.
• Language: Embedded C
• Microcontrollers: ARM Cortex-M, ideally STM32
• Architecture: bare-metal, real-time, low power
• Radio: sub-GHz protocols, MAC/link layers, SI446x transceiver drivers
• Security: AES, authentication, anti-replay protection, key management
• Testing and debug: automated tests, radio sniffer, logic analyzer, spectrum analyzer
• Quality: embedded CI/CD, static analysis, MISRA C

Project details

• Start: flexible
• Remote: hybrid
• Location: Grenoble, France, FR
• Rate: 56-59 EUR/h
• Languages: French