Freelancer profile translated to English.
Back to original languageAbout Valentin
Embedded electronics engineer and enthusiast, I assist individuals, start-ups, SMEs, and industrial clients in bringing their ideas to life, from requirements to market launch.
I can undertake specific tasks (electronics, low-level software, mechanical design) or manage global projects, collaborating with my associate who is a software expert. Together, we cover all stages of product development: R&D, prototyping, CE marking, industrialization, and small to medium-scale production.
We transform your ideas into patented, industrialized, and marketed products, integrating industrial constraints from the design phase. Depending on your needs, we can handle a specific phase (study, prototyping, industrialization) or the entire project.
Through our Protelec structure, we have an extensive network of suppliers (France and Asia) and various equipment (electronic components, 3D printing, tooling...), which accelerates your project's realization.
I look forward to discussing your future projects!
For high-level software projects, you can also contact my associate on Malt 👉 Lucas Teissier.
French
Native or bilingual
English
Fluent
Can work on-site
Toulouse (up to 50km)
Experience
- PROTELECDevelopment of a secure Li-Po charging solutionMEDICALFebruary 2025 - June 2025 (4 months)Toulouse, France📌 Development of a secure and monitored charging solution for batteries, integrating thermal management, RF compatibility, and advanced monitoring.➡️Technical Design and Development
- Study and integration of complex components: BQ25703 charger, STUSB4500 controller, TPS259461 e-Fuse, MAX17320 fuel gauge, and ESP32-S3 for battery monitoring and control.
- Design of power stages and power supplies including ESD protection, EMC filtering, power management for Raspberry CM4 + Wi-Fi/4G modules, and charging of secondary equipment.
- Complete schematic design and 4-layer routing using KiCad. Management of strict miniaturization constraints, top-only placement, thermal optimization, and RF compatibility.
- Development of a second controllable power PCB (5x10 W) for charging secondary equipment.
- Development of C++ drivers and firmware, including deep sleep, current/temperature monitoring, and charge safety.
➡️Testing, Validation, and Optimization- Prototyping and electrical validation with manual corrections for reliability.
- HF, thermal, and electrical measurements to ensure performance and safety.
- Definition of specific harnesses and test procedures to secure critical functions.
- Sourcing and optimization of active/passive components and Wi-Fi/4G antennas (cost, performance, security).
➡️Production and Industrialization- Production of a small series of 30 units for field validation.
- Manual harness design and complete technical documentation for industrial reproduction.
- Supplier recommendations to ensure quality and reliability.
💡Tools & Expertise**Software**: KiCad, Fusion 360, VS Code + Docker.**Languages**: C/C++, Python.**Protocols**: I2C, UART, USB, Wi-Fi, Embedded RTOS.**Expertise**: Power circuits, thermal management, RF compatibility, miniaturization, battery safety. - PROTELECCo-founderTECHJune 2021 - Today (5 years and 1 month)Toulouse, France📌 **Design office in electronics, mechanics, and software**, we have supported start-ups and industrial clients in developing tailor-made solutions. We have primarily worked in the industrial and IoT sectors, from specifications to manufacturing.Examples of achievements:➡️IoT Project: Development of home automation sensorsDevelopment of a network of connected sensors (controlled sockets, motion sensors...) linked to a central hub (MPU ARM Cortex A5 architecture), managed by a web application.➡️Industrial Project: Production optimization toolingDevelopment of a test tool to validate electronic boards during production. This tool simulates signals, measures specific points, and programs microcontrollers during conformity tests. It also allows for results tracking, data visualization, and export.➡️Industrial Project: Production toolingDevelopment of a wire cutting tool for specified lengths using a stepper motor that manages wire unwinding and servomotors that perform the cut. The operator can set the length and number of wires to cut using a screen to prepare for production.💡Some technologies used:**Programming Languages**: C, C++, Python, PHP, Javascript, SQL.**Web Applications and Processes**: Apache, SQLite, MQTT, SSL, cURL, jQuery, Bootstrap.**Hardware**: SAMA5D3 (ARM Cortex A5), PIC18F, STM32, ESP, Raspberry Pi, MRF89, Arduino, OLED display, stepper motor, servomotor.**Communication Protocols**: SPI, UART, I2C, Bluetooth, Wifi, LoraWan.**OS**: Debian, Raspbian, Custom Linux (Buildroot), RTOS.
- NENUFARMCo-founder & CTOTECHJanuary 2019 - June 2025 (6 years and 5 months)Toulouse, France📌 As CTO at Nénufarm, I played a central role in the design, development, and launch of the "Aquarium Potager" (Vegetable Aquarium). This role led me to manage all technical aspects, from concept to industrialization, including managing a multidisciplinary team and relations with suppliers.➡️Technical Design and Development:
- PCB schematics and routing (KiCad), electrical and thermal simulations, 3D renderings, iterative prototyping from manual assembly for initial tests to industrial PCBA for final validation.
- 3D modeling (SolidWorks, Fusion 360) considering various manufacturing processes (3D printing, thermoforming, plastic injection, machining, etc.), assemblies, and photorealistic renderings.
- Software development for ATtiny and ATSAMD microcontrollers (C/C++, Git).
- Sourcing and selection of electronic and mechanical components, with a constant focus on cost optimization.
- Design of electronic and mechanical tools dedicated to automation and production testing, with specific developments on Raspberry Pi, Arduino, and ESP (C/C++/Python).
- Creation of comprehensive technical documentation (Specifications, design, testing).
- Performance and validation testing to ensure compliance with requirements, including CE marking.
➡️Production and Supply Chain Management:- Development and optimization of manufacturing processes.
- Supplier identification, management, and quality control.
- Implementation and management of an ERP system (Dolibarr) to structure production operations.
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Education
- Engineering degree in embedded systems, mechatronics specializationCESI Labège2018Industrie & innovation, informatique & numérique