Freelancer profile translated to English.
Back to original languageAbout Harold
Freelance Full Stack Developer specializing in Web, Mobile, and innovative architectures (Web3 & AI). I support startups, scale-ups, and companies in designing high-performance, secure, and scalable products, from idea to deployment.
My role: transforming complex business needs into robust and pragmatic technical solutions, with a product focus and without unnecessary over-engineering.
What I concretely bring:
- Full stack web, mobile, AI development (high-performance applications, polished UX, maintainable and scalable architectures)
- Design of secure backend & APIs, oriented towards performance and scalability
- Integration of advanced technologies (blockchain, Web3, AI) when they bring real business value
- Architectural & product vision, with a strong R&D and innovation culture
- Intelligent use of AI to accelerate development while ensuring quality and reliability
Key experiences:
- Lead developer on projects with high technical stakes (R&D, space, data traceability (CNES), finance)
- Development and deployment of complete web & mobile platforms (from MVP to scalable product)
- Collaboration with international institutions and companies
- Technical direction and team management on complex products
What sets me apart:
- Dual product & architecture expertise
- Ability to simplify technical topics
- Approach focused on real business impact
- Autonomy, reliability, and long-term vision
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- DROPP
On Malt
Full Stack Web & AI DeveloperSOFTWARE PUBLISHINGApril 2026 - April 2026Full-stack development within an artificial intelligence project, with complete management of different components, from backend to user interfaces, including AI model integration. - ZynorkFull Stack Web & Mobile DeveloperENTERTAINMENT AND LEISUREFebruary 2026 - Today (6 months)Toulouse, FranceBuilding the MVP of an innovative fitness platform designed as a "sports Airbnb," allowing owners of underutilized spaces (gyms, hotels, courts, studios, individuals, etc.) to generate passive income through a subscription and intelligent redistribution system.Objectives:
- Design and develop the MVP from scratch
- Structure a scalable and evolvable architecture
- Translate an ambitious business vision into a concrete digital product
- Lay the technical foundations for future growth
Actions:- Definition of the technical architecture and product foundation
- MVP development (frontend, backend, database)
- Implementation of key logics: credit card payment and fund redistribution
- Design of the establishment dashboard and the management system for activities, bookings, and payments
- Close collaboration with the founder on product vision and business model
Results:- MVP launched and accessible online, validating initial product hypotheses
- Implementation of key features for onboarding establishments and users
- Initial structuring of a revenue model based on subscriptions and intelligent redistribution
- Solid and scalable technical base ready to support scaling
- Successful alignment between business vision and product execution
- SARL Nuits ToulousainesCreation of the Frankielanuit websiteRESTAURANTS AND FOOD SERVICEFebruary 2026 - April 2026 (2 months)Toulouse, FranceDesign and development of a custom website, with an approach focused on client needs, technical performance, and online visibility.Objectives:
- Design a modern, high-performance, and scalable website
- Precisely meet the functional needs and client expectations
- Optimize website visibility through an effective SEO strategy
Actions:- Website development with Next.js for the front-end and Strapi for content management
- Analysis and consideration of business needs and specific client constraints
- Structuring of content and pages with an SEO logic
- Implementation of technical optimizations (performance, markup, accessibility)
- Integration and adjustment of functionalities based on client feedback
- Continuous collaboration with the client to refine the project and ensure its coherence
Results:- High-performance, modern website tailored to client needs
- Robust and scalable technical architecture
- Improved search engine visibility through SEO optimizations
- Smooth and consistent user experience
Reviews
Recommendations
+3
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Education
- Développeur Web et Web Mobile, Programmation / développeur informatique, généralWild Code School2021Développeur Web et Web Mobile, Programmation / développeur informatique, général
- Développeur web mobile avancé, Programmation / développeur informatique, généralWild Code School2022Développeur web mobile avancé, Programmation / développeur informatique, général
Certifications
- Ethereum and Solidity: The Complete Developer's GuideUdemy2023