Freelancer profile translated to English.
Back to original languageAbout Jonathan
Senior C++ Developer, Tech Lead, and Engineering Manager, I intervene in a hands-on/hands-off manner on complex and performance-critical software systems.
With over 9 years of experience, I am a senior C++ engineer focused on backend and complex systems, with strong experience in health/med-tech, crypto, and critical software, in environments where reliability, security, and execution quality are essential.
I specialize in modern C++ and backend architectures, with strong proficiency in Python and hands-on experience in Rust, focusing on software architecture, performance, robustness, and long-term maintainability.
As Head of Software at Astraveus, I led and structured a multidisciplinary software organization while remaining technically involved, transforming R&D prototypes into industrialized and regulated software, used by internal teams and external partners.
I bring a hybrid profile combining deep technical expertise and software leadership: from hands-on development and architecture to technical direction, team structuring, and delivery responsibility.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- AstraveusHead of SoftwareMEDICALMay 2024 - Today (2 years and 3 months)Le Kremlin-BicĂȘtre, FranceAstraveus is a biotech company specializing in the automated production of cell therapies (CAR-T).Its Lakhesysâą technology is a miniaturized and automated platform, compliant with cGMP standards, covering RUO to clinical phase applications.It combines microfluidics, biology, robotics, and software to ensure reliability and reduce manufacturing costs.As Head of Software, I lead the vision and software implementation of the Lakhesysâą platform, at the interface of product, quality, and regulatory affairs.đ Key Achievements- Transformed R&D software into a production-ready platform used by our users.- Defined and implemented the architecture and development standards.- Implemented a delivery framework balancing agility and regulatory requirements (GAMP5, ISO 13485, 21 CFR Part 11).- Mentored junior profiles towards technical leadership and expert roles, increasing velocity and optimizing costs.- Technical leadership of software, hardware, microfluidics, and biology integration.đ§ Responsibilitiesđ» Software Development & Architectuređ„ Management: Leading a multidisciplinary team of 14 engineers and specialists.đ° Budget Management: Managing an annual budget of âŹ2 million.âïž Methodology & Compliance: Agile framework compatible with GAMP5 / ISO 13485, compliance with 21 CFR Part 11 & EU Annex 11.đ€ Delivery & Partnerships: Coordination of external partners and cross-functional teams.𧰠Tech Stackđ„ïž Desktop: C++ 23, Qt, vcpkg, Ubuntu, GTest, OpenCV, Boost, nlohmann-jsonđ Embedded: C++ 23, CMake, vcpkg, Raspberry Pi⥠Firmware: C, SPI, STM32đ Backend & Web: Python, FastAPI, Next.js, TypeScriptđ Monitoring & Traceability: PostgreSQL, InfluxDB, Kafka, Grafana, Elasticsearch, ELK𧱠CI/CD & Tools: GitHub Actions, SonarCloud, Docker, Jira, Notion
- CMA-CGMC++ Lead Software EngineerIMPORT AND EXPORTFebruary 2024 - May 2024 (3 months)Marseille, FranceCMA CGM is one of the world leaders in maritime transport and logistics, offering innovative and sustainable transport solutions across over 420 ports in 160 countries.đĄ Mission & ProjectFreelance mission within CMA CGM's innovation department.Development of a Proof of Concept (POC) aimed at creating an intelligent maritime navigation solution (a true Google Maps / SNCF Connect for maritime transport) integrating operational, meteorological, and logistical constraints specific to the sector.This mission also included an in-depth technical benchmark of candidate technologies, intended to guide strategic choices of stakeholders for the future product.đšâđ» Role & Responsibilities- Technical lead of a team of 3 engineers specializing in operational research and algorithms.- Definition of the software architecture and technological choices for the POC.- Supervision of the development of the maritime route calculation engine based on the RAPTOR algorithm.- Coordination with data and R&D teams to integrate business and infrastructure constraints.âïž Technical Environment- Languages: C++20, Python (pandas)- Build & dependency management: CMake, vcpkg- Libraries: fmt, spdlog, magic-enum, nlohmann-json, Boost, GTest- Infrastructure: Ubuntu, Docker, GitLab, Jenkins CI- Algorithms: RAPTOR (Routing Algorithm for Public Transport Optimisation)đŹ Short freelance mission, focused on the design and technological validation of a software platform with high innovation potential.
- Spot WalletSenior back-end developer | C++ / Rust / PythonBANKING AND INSURANCEApril 2023 - January 2024 (9 months)Paris, FranceSpot is a self-custodial crypto wallet that makes managing cryptocurrencies simple, fast, and secure.Compatible with Bitcoin, Ethereum, Polygon, Solana, Tezos, NFTs, and over 200 tokens, Spot allows you to store, exchange, buy, sell, or stake crypto, while maintaining full control of your assets.The application offers native integration with the Web3 and DeFi ecosystem (OpenSea, Magic Eden, Uniswap, Aave, Compound, etc.) via WalletConnect.A fast-growing startup, Spot was acquired by Voodoo, marking a major success and the natural end of my contract.đĄ Project & RoleParticipation in the development of the Spot mobile application (Android & iOS), in a demanding technical environment.Within a multidisciplinary team of 7 people, I was primarily responsible for backend development and DevOps infrastructure, with a strong focus on security, scalability, and blockchain connectivity.âïž Technical Environment- Languages: C++20, Rust, Python (Flask)- Build & dependencies: CMake, vcpkg- Blockchain / Web3: REST API, RPC, libbitcoin, cryptopp, OpenSSL- Libraries: Boost, cppcodec, fmt, gtest, nlohmann-json- Systems: macOS, Ubuntu, iOS, Android- Infrastructure: GitHub, CI/CD, Docker, KubernetesđŹ Rich and technical startup experience, concluded by the acquisition of Spot by Voodoo.
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Education
- Master's Degree: Expert in Information Technologies, Computer EngineeringEPITECH - European Institute of Technology2020BAC +5 : Expert en Technologies de l'information, Ingénierie informatique
- Scientific BaccalaureateLycée Le Corbusier2015Baccalauréat scientifique