Freelancer profile translated to English.
Back to original languageAbout Mohamed Said
Embedded Software Engineer with 5 years of experience in the design, development, and integration of complex embedded systems. Specializing in microcontrollers (STM32, NXP, PIC, ESP32), communication protocols (CAN, SPI, I2C, UART, BLE, LoRa, Ethernet), and real-time systems (FreeRTOS). Proven experience in low-level development (C, C++, ASM → C) and in implementing secure solutions (bootloader, OTA, encryption, digital signatures).
Ability to manage R&D projects from end-to-end: software architecture, hardware drivers, human-machine interfaces (Python, Qt, Android), industrial standards (IEC61850, NFIEC), and configuration management tools (GitLab, Jira, SVN).
Further training in Cybersecurity and IoT (University of Cergy Paris).
Trilingual (French, English, Arabic).
Arabic
Native or bilingual
English
Fluent
French
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- R&D CATU Groupe SICAMEEmbedded Software EngineerINTERNET OF THINGS (IOT)June 2024 - Today (2 years)Paris, FranceProject 3: Design and implementation of a new software architecture for a railway catenary earthing control card (SECUM Project)- Implementation of a sequencer-driven software kernel- Development of new product features- Adaptation of detection algorithms to ensure compliance with electrical standard evolutions.- Tools: MPLAB IDE, C, PIC, I2C, Standards: NFIEC/61243-1, 61243-2, 61243-3.Project 2: Software migration of a microcontroller (from Assembly to C) with the addition of new multi-caliber functionalities for the voltage detector - (CC756 Project, 3 months)- Migration of old Assembly (ASM) software to C on a new PIC microcontroller platform- Technical study, definition of software architecture, and implementation of a sequencer- Selection of the microcontroller suited for the product's functional needs- Development and integration of new multi-caliber detection functionalities- Writing of the project's technical documentation.- Tools: MPLAB IDE, C, PIC, I2C, MCP23009, Standards: NFIEC/61243-1, 61243-2, 61243-3.Project 1: Development of a voltage and drop detection device communicating with a mobile application via BLE [CAT’SAFE] (8 months)- Development of product operating algorithms on PIC in C.- Emulation of the mobile application with a Python HMI- Encapsulation of the specific protocol within the UART protocol (Python)- Setup of communication (product/HMI) via UART (Python)- Tools: MPLAB IDE, VS Code, Python, C, UART, BLE, PIC.
- R&D FAREEmbedded Software EngineerTECHJune 2023 - May 2024 (11 months)Pithiviers, FranceMigration and integration of software for a new range of RF products:- Migration of old code (on PIC µC) to Cortex M4 microcontrollers- Encapsulation of the TNET communication protocol (wired) into an RF protocol (wireless)- Implementation of new product functionalities.- Writing of the project's technical documentation.
- Groupe Telnet,Embedded System EngineerTECHJanuary 2021 - January 2023 (2 years)TunisiaDevelopment of an industrial measurement device on a microcontroller communicating through various protocols (Modbus, TCP/IP, IEC61850):- Integration of the FreeRTOS real-time operating system- Development of the driver for the ADE9000 measurement component- Setup of SPI communication between the microcontroller and the ADE9000- Design and implementation of electrical measurement acquisition algorithms- Development and implementation of current and voltage measurement calibration algorithms- Development of a software layer for inter-core event management on a multi-core microcontroller- Development of external communication protocols (Ethernet, Modbus, IEC 61850) with implementation of security mechanisms via MBDTLS.- Design and development of a secure Bootloader for project firmware updates.- Implementation of software security mechanisms for code integrity and authenticity verification during updates (digital signature, hash verification).- Integration of cryptographic functions (SHA-256, RSA/ECC) for firmware validation and protection against code injection attacks.- Management of secure Over-The-Air (OTA) update processes with metadata and certificate verification.- Setup of a secure rollback system to restore the previous version in case of update failure.- Testing and validation of the Bootloader on embedded targets with simulated failure and attack scenarios.- Tools: MCUXPRESSO, NXP RT117 (dual core), ADE9000, OMICRON CMC430, SPI, Ethernet mms, ModBus, IEC61850, TCP/IP.
Recommendations
Be the first to recommend Mohamed Said
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Master's degree in Cybersecurity and IoTUniversity of Cergy Paris2023Mastère spécialisé cybersécurité et IOT,
- Engineering degree in Network and Electronics EngineeringNational Engineering School of Tunis2021Cycle d'ingénieur en génie Réseau et électronique,