Freelancer profile translated to English.
Back to original languageAbout Wiam
Tech Lead & Full-Stack/IoT Developer - From embedded to cloud
Versatile engineer with 9 years of development experience and 3 years in technical leadership, I work across the entire technology chain: from embedded firmware/systems (C/Rust) to web/mobile applications (React/Node.js), including cloud architecture and IoT systems.
My added value
I intervene at different levels depending on project needs: development, architecture, or team coordination. This versatility allows me to understand the challenges at each level and facilitate communication between different stakeholders.
As CTO of a medtech startup, I led the development of a telemedicine SaaS platform. My role: architecting the overall solution, developing critical components (IoT gateway in Rust, WebRTC integrations, embedded system), coordinating a team of 3 developers, and overseeing external contractors. This experience allowed me to navigate between technical challenges (real-time, scalability, embedded) and business aspects (product roadmap, client interface).
Areas of expertise
Architecture & Tech Lead: Design of complete architectures, product roadmap, team coordination (5+ developers)
Web/Mobile Development: React/React Native applications, REST/GraphQL APIs, Node.js/NestJS backends
Embedded Systems & IoT: Real-time firmware (C/FreeRTOS), Linux gateways, wireless protocols
Infrastructure: Microservices, Docker, AWS, PostgreSQL, CI/CD
Pragmatic approach
I adapt to the real needs of the project: technical lead to structure a team, full-stack developer to quickly deliver an MVP, embedded developer to optimize critical firmware. My cross-functional experience allows me to bridge the gap between hardware, software, and business teams.
Technical Stack
C • React • Node.js • TypeScript • NestJS • GraphQL • Rust • FreeRTOS • AWS • Docker • ESP32 • STM32
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Paris (up to 50km)
Experience
- MobilityCareCTO - Tech LeadMEDICALSeptember 2022 - June 2025 (2 years and 9 months)Paris, FranceDevelopment of a telemedicine SaaS platformArchitecture and development of a complete online telemedicine solution. Backend design in NestJS with microservices architecture and GraphQL API. Development of real-time interfaces for video consultations and patient monitoring.Implementation of real-time transmission via WebRTC for video consultations and WebSocket for vital data monitoring. Implementation of complex medical workflows with rights management and GDPR compliance.Development of React web and React Native mobile applications for patients and practitioners. The deployed architecture ensures reliable and secure communication between the different stakeholders (patients, doctors, institutions), with interfaces adapted to the constraints of the medical sector and high availability.Extension of the system with integration of connected medical devices via an IoT gateway developed in Rust on embedded Linux, enabling secure data collection and transmission from field medical equipment.Technologies:React, NestJS, GraphQL, TypeScript, PostgreSQL, WebRTC, WebSocket, React Native, Docker, AWS, Redis, Rust, Embedded Linux
- IcohupEmbedded Systems DeveloperINTERNET OF THINGS (IOT)January 2020 - March 2022 (2 years and 3 months)Limoges, France
Development of dosimetry sensors
Main tasks:- Firmware development on ATMEL SAMD21 and ESP32 microcontrollers, under FreeRTOS, to ensure sensor reliability and performance.- Implementation and optimization of wireless and wired communication protocols: WiFi, Bluetooth, NFC, UART, SPI.- Electronic support: hardware modifications, schematic validation, and component integration monitoring.- CE certification supervision for export, ensuring product compliance with current standards.Technical Environment:C, FreeRTOS, ATMEL SAMD21, ESP32, WiFi, Bluetooth, NFC, UART, SPI - CONTINENTALEmbedded Systems DeveloperAUTOMOBILEJanuary 2019 - December 2019 (1 year)Toulouse, FranceEmbedded systems developer - Classic AUTOSAR IntegrationConfiguration and integration of Classic AUTOSAR modules in the EB Tresos environment. Parameterization of software components and communication layers for embedded automotive systems.Technologies: Classic AUTOSAR, EB Tresos, Embedded Systems, C
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Education
- Engineering Degree, Embedded Electrical Electronic SystemsEI.CESI - Engineering School of CESI2017Diplôme d'ingénieur, Systèmes Electriques Electroniques Embarqués
- University Diploma of Technology, Electrical Engineering and Industrial ComputingIUT of Saint Etienne2012Diplome Universitaire de Technologie, Génie Electrique et Informatique Industrielle