Freelancer profile translated to English.
Back to original languageAbout Martin
Web Developer | Next.js | React.js | Typescript
8+ years of experience - ex-CTO - 3 B2B SaaS startups co-founded - 100+ clients supported.
I handle projects from idea to production: product scoping, architecture, development, quality, delivery, and handover.
Goal: deliver quickly, cleanly, and build a sustainable technical foundation.
🔧 What I can do for you
- Develop your product from scratch (web, mobile, API, AI)
- Strengthen your team
- Design and deliver critical features
- Structure/refactor a codebase to make it maintainable
- Advise you on technical choices and product roadmap
⭐ Why work with me
- **Product + technical vision**: I think about usage, business value, and feasibility
- **Hands-on experience**: 3 SaaS platforms delivered and operated in real-world conditions
- **Reliable execution**: clean, tested, documented code
- **Clear communication**: regular updates, explained trade-offs, no gray areas
- **Long-term approach**: scalable architecture, simplified onboarding, easy handover
📈 My experience at a glance
- 8+ years in fullstack, mobile, and AI development
- Ex-CTO / ex-co-founder of startups (LVL UP, FIXEE, Tikaway/Kolus)
- 3 SaaS products built from the ground up (acquisition, evolution, maintenance)
- AI expertise applied to products: RAG, LLMs, business assistants
Main Stack
Frontend / Mobile: TypeScript, JavaScript, React, Next.js, React Native, Svelte, SvelteKit
Backend / Data: Node.js, NestJS, PostgreSQL, MongoDB, Supabase
AI & Integrations: LangChain, OpenAI API, Milvus, Twilio, Stripe
Methodologies: DDD, TDD, SOLID
My way of working
- Quick scoping of needs and priorities
- Clear roadmap with concrete deliverables
- Iterative development with frequent progress updates
- Secure deployment + documentation + handover
- Post-delivery support as needed
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 50km), Paris (up to 50km), Marseille (up to 50km), Strasbourg (up to 50km), Lille (up to 50km)
Experience
- LVL UPLead DeveloperSOFTWARE PUBLISHINGJanuary 2025 - April 2026 (1 year and 3 months)Lyon, France🎯 Mission: Digitize dance school management by replacing Excel/paper with a complete cloud solution.💡 Challenge: Schools managed everything manually (registrations, payments, scheduling) with the associated problems: no real-time synchronization, missed payments, complex permission management, no student overview.✅ Solution delivered from scratch:Complete development of the SaaS platform (architecture, backend, frontend) with SvelteKit and Supabase. Custom design system (Shadcn + Tailwind) for a modern and consistent interface.Key features developed:• Comprehensive management of orders and payments with automated installments (Stripe integration)• Granular roles and permissions system• Management of classes, registrations, and dynamic scheduling• Dual interface: complete admin view and simplified student view• Extensive customization per school to fit each need🎨 Support beyond code:As a co-founder and technical lead, I also contributed my vision to:• UX Design and user journeys• Product strategy and development priorities• Business and marketing decisions📈 Result: 17 schools acquired in the first year, all satisfied. Operational, scalable platform ready to grow.
- FIXEELead DeveloperSOFTWARE PUBLISHINGJuly 2023 - September 2025 (2 years and 2 months)Lyon, France🎯 Mission: Increase the efficiency of industrial after-sales services through real-time omnichannel communication coupled with an AI assistant that leverages past resolutions.💡 Challenge: Industrial after-sales services were losing time and money with limited communication and loss of know-how with each problem resolution. A solution was needed to facilitate communication (video calls, photos, videos, chat, WhatsApp) while retaining expertise for future interventions.✅ Solution delivered from scratch:Complete development of the SaaS platform (architecture, backend, frontend) with React, Next.js, and Node.js. Advanced AI system with RAG (Retrieval-Augmented Generation) to power the intelligent assistant.Key features developed:• RAG system to leverage past resolutions and improve knowledge retention• Integration of LLMs for intelligent assistance and automatic translation• Real-time omnichannel communication via Twilio: video, chat, SMS, WhatsApp• Complete ticketing system with fine-grained permission management• Real-time annotation tool on video streams for remote assistance🎨 Support beyond code:As an associate CTO and technical co-founder, I also contributed:• Product vision and challenging strategic decisions (sparring partner to the CEO)• Recruitment and technical team management (interns, freelancers)• Technical lead: coordination and skill development of the team• UX Design and definition of user journeys• Proposing ideas for product priorities📈 Result: 30+ paying satisfied clients. Operational platform with a successful handover upon my departure (support until successor recruitment).
- kolus.ioLead DeveloperSOFTWARE PUBLISHINGNovember 2021 - January 2023 (1 year and 2 months)Lyon, France🎯 Mission: Reduce unnecessary travel for industrial technicians through a complete and user-friendly remote assistance solution.💡 Challenge: Following the Tikaway project (connected glasses + SaaS), a pivot towards a simplified web solution to accelerate customer adoption. A need for an accessible, efficient, and intuitive platform to replace costly travel with real-time remote assistance.✅ Solution delivered from scratch:Complete architecture redesign for accelerated customer adoption. Fullstack development (React, Next.js, Node.js) of a simplified and performant web solution.Key features developed:• Real-time omnichannel communication via Twilio: video, chat, SMS• Real-time annotation tool on video streams for collaborative assistance• Advanced ticketing system with fine-grained permission management• Dynamic customer assistance workflows with React Flow to guide interventions• Sharing of technical documentation and collaborative annotations🎨 Support beyond code:As CTO and technical co-founder, I also contributed:• Product vision: defining the roadmap and priorities for the successful pivot• UX Design: user journeys optimized for technicians and clients• Technical team management (interns, freelancers)• Strategic decisions to simplify and accelerate adoption📈 Result: Successful pivot of Tikaway to Kolus with rapid customer adoption. 50+ satisfied clients. Product taken over and sustained by the acquirer.
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Education
- Master in Information TechnologyEpitech2019