Freelancer profile translated to English.
Back to original languageAbout Antoine
CTO of Founders | React · Next.js · TypeScript | 6 years of experience
Do you have a clear product vision but no one to turn it into technical reality? An MVP that struggles to fully satisfy your users, a no-code stack that slows you down, a need for a tech right-hand man to structure the build?
I act as CTO for founders. I translate your vision into a product delivered now and scalable from end to end, with an ROI-focused approach and controlled costs from day one.
Specifically:
→ Translation of founder vision into an actionable technical roadmap
→ Architecture designed to last (not to be redone in 6 months)
→ End-to-end build: front, back, infra, payments, data
→ Build vs buy trade-offs, control of cloud and SaaS costs
→ Foundations that allow a team to take over without debt
What sets me apart: a rare profile combining web dev, SaaS, and Data Engineering. I have worked in large corporations (Transdev, Canal+, OVH, Publicis), SMEs, and startups, including one as CEO. Therefore, I understand your business challenges as well as your technical and financial constraints.
Achievements:
→ B2B/B2C SaaS and white-label: scalable, multi-tenant, polished UX
→ iOS & Android mobile apps in React Native (including Velvet, +1000 users)
→ Stripe Connect with multi-level commissions, mastered end-to-end
→ Reporting tools and dashboards for demanding data teams
→ Scraping and automation to accelerate your operations
→ Programmatic SEO/SEA sites generating tens of thousands of pages
Turnkey approach: a stable, scalable, and profitable product. Every technical decision is filtered through ROI and business trajectory.
Stack: React.js, Next.js, TypeScript, NestJS, Adonis, Tailwind CSS, ShadCN, Prisma, Stripe Connect, React Native, GraphQL, AI/LLM engineering.
Contact me to understand your challenges and propose a concrete approach. Response within 1 hour.
English
Native or bilingual
French
Native or bilingual
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km), Nantes (up to 50km), Marseille (up to 50km)
Experience
- NeodyaFounding EngineerSOFTWARE PUBLISHINGApril 2026 - Today (4 months)Paris, France
Founding Engineer | MVP, Growth & Scalability
I act as aFounding Engineeron a product in the launch phase, with the goal of designing and developing, from the first line of code, a platform for generating and leveraging leads at scale.The project is part of atest & learnapproach, with a strong focus on rapidMVPvalidation through revenue generation from the first production release.I am the sole developer and I structure the entire technical stack and develop the first tools to automate the generation of business site templates, and the management and distribution of leads via an existing AI Voice Agent.Since the start of the mission, I have been involved in:- Designing and developing a full-stack platform (TypeScript / Next.js) for real-time lead sales using Stripe Connect
- Scalable and maintainable data schema, reflecting business needs
- Creating a large-scale dynamic page generation system (Psea)
- Developing a fully configurable back-office for business page generation
- Automating workflows related to lead acquisition and management via an Adwords integration
- Integrating payment solutions (Stripe, Stripe Connect)
- Implementing an AI chatbot for qualifying needs via self-hosted dify
- Setting up a performance and scalability-oriented architecture (Cloudflare, VPS, light CI/CD)
Currently in production, the platform's MVP allows for the generation and orchestration of significant lead volumes for the startup to be self-funded.Technical context:- TypeScript
- Next.js / tansack start
- NestJS & Websocket
- Cloudflare (Workers, edge computing)
- API Development
- Stripe / Stripe Connect
- Databases
- CI/CD
- Scalable architecture
- Workflow automation
- Hello CoachNext.js, React Native and Nest.js Developer - CEOSOFTWARE PUBLISHINGJuly 2025 - Today (1 year and 1 month)Paris, FranceFull development of Hello Coach, a white-label SaaS application for training centers to professionalize their sports coaches and digitize their activities.Design and development of the coach back-office with Next.js, React, TypeScript, TailwindCSS (SSR, routing, performance, modular architecture).Development of the backend architecture with NestJS, TypeScript, DTO, Auth, Redis, Docker Swarm on a modular, scalable, multi-tenant SaaS-oriented monorepo.Development of the mobile application for coaches with React Native, state management, navigation, secure API integration.Implementation of a white-label SaaS architecture: multi-client management, customization, data isolation.Integration of payments with Stripe Connect: account onboarding, commission management, automatic transfers, webhook management.Implementation of automated tests, CI/CD, production deployment, environment management.Management of scalability, data security, performance, and long-term maintainability.👉 In-depth expertise in designing and scaling a transactional SaaS (marketplace / commission-based model).
- VelvetWeb and Mobile Front-end Backend Developer Next.js | React Native | TypescriptSOFTWARE PUBLISHINGJanuary 2025 - Today (1 year and 7 months)Paris, FranceEnd-to-end development of a modern dating application with React Native via Expo, from technical design to production deployment.Front-end architecture and development of the showcase website with Next.js, React, React Native, TypeScript, JavaScript, TailwindCSS, with a focus on performance, maintainability, and user experience.Design of web and mobile interfaces optimized for conversion and user retention (engagement-oriented UX).Robust Back-end development with Nest.js, WebSocket, BullMQ, Auth, DTO, TypeScript, JavaScript.Implementation of a real-time chat system via WebSocket with intelligent connection management and scalability.Integration of an AI model for automatic detection of non-compliant content (proactive moderation and legal risk reduction).Design and optimization of the user feed algorithm to improve engagement, relevance, and time spent on the application.Implementation of a scalable and performant architecture (asynchronous management via BullMQ, clear separation of responsibilities, DTO for robust API contracts).
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Education
- Application Designer DeveloperUdemy2021
- Master 2 Grande École ProgramNeoma Business School2020Master en Management - Data & Information systems
Certifications
- MicrosoftPL-3002024
