Freelancer profile translated to English.
Back to original languageAbout Jonas
🎯 Product Web Developer – 20 years of experience, including 15 as a freelancer
I assist founders, product teams, and SMEs in transforming an idea into a concrete application, from functional scoping to production deployment. My playground: SaaS, MVP, and rapid prototypes.
🧠 A Product-First Approach
Move fast on a first version, validate usage in the field, then evolve the solution properly. I prioritize simplicity, performance, and maintainability over technical complexity. The goal: deliver a product that works from launch and lasts over time.
⚡ Modern Stack, Centered on Next.js
I primarily work with Next.js to build fullstack applications that are fast to deploy and robust to scale. A proven foundation for moving from prototype to production SaaS without rewriting everything.
🤖 Applied AI
I integrate AI components to automate business workflows, improve user experience, or accelerate the processing of certain tasks – where it brings real value, not just for show on a landing page.
🚀 What I excel at:
✔️ Design and development of SaaS MVPs
✔️ Rapid prototyping to validate a product idea
✔️ Custom business applications
✔️ Integration of APIs and third-party services (payment, AI, etc.)
✔️ Production deployment
✅ Response within 1 hour via Malt messaging
An MVP to launch?
A prototype to validate?
A SaaS to build?
👉 Let's talk about your project.
French
Native or bilingual
English
Fluent
Can work on-site
Saint-Brieuc (up to 50km), Paris (up to 50km), Nantes (up to 50km), Rennes (up to 50km), Bordeaux (up to 50km)
Experience
- MobflowAssociate CTOSeptember 2025 - Today (9 months)Partnered on Mobflow, a SaaS platform dedicated to the digitalization and automation of international mobility for apprentices.Mobflow transforms a complex administrative process involving multiple stakeholders (apprentices, training centers, companies, foreign partners) into a fluid and fully dematerialized digital workflow.
🚀 SaaS Architecture and Development of a Complex Business Application
My role in the project:✔️ Definition of the SaaS technical architecture✔️ Design and development of the core application✔️ Implementation of multi-stakeholder automated workflows✔️ Development of automatic document generation✔️ Integration of a multi-party electronic signature system✔️ Management of deployments and infrastructure✔️ Steering technical evolutions and scalability📄 Automation of Documents and Electronic Signature
Mobflow addresses a common business challenge:international mobility management often relies on multiple documents, manual approvals, and scattered exchanges.The solution enables:✔️ Automatic generation of mobility agreements✔️ Electronic signature involving multiple signatories✔️ Complete real-time case tracking✔️ Reduction of administrative errors✔️ Paperless workflow✔️ Significant time savings for teams✔️ Better traceability of international cases🎯 Digitalization of Administrative Processes for Organizations and Multi-Stakeholder Structures
This project illustrates a key challenge faced by many organizations:👉 Transforming a cumbersome administrative process into an automated, reliable, and accessible business application.🧠 Modern SaaS Technologies and Self-Hosted Infrastructure
Next.jsSupabaseDocumensoVercelPartially self-hosted infrastructure - EI - Jonas MilletFullstack JS Developer | React | Next | AISOFTWARE PUBLISHINGJanuary 2010 - Today (16 years and 5 months)Saint-Brieuc, France
🚀 Fullstack Development
✔️ Custom Business Applications(internal tools, activity management, booking, inventory, invoicing…)✔️ SaaS Creationfrom the initial idea to a platform used by clients or teams.✔️ MVP and Prototype Developmentto quickly test an idea with users or investors.✔️ Process Automationeliminating double entries, synchronizing between tools, automatic document generation.✔️ Modernization of Existing Toolsreplacing Excel files or outdated applications.🤖 Integrating AI into Business Tools
I also assist companies in integrating artificial intelligence for practical uses:✔️ automatic summary generation✔️ intelligent document search✔️ automation of repetitive tasks✔️ internal assistants based on company dataThe goal remains the same:save time, ensure data reliability, and simplify team work.+200 companies assistedConcrete projects, used daily by their teams. - Meilleure Chaîne de MagasinsAI ChatBot Development | Node.js | Make | React | Claude AIRETAIL (SMALL BUSINESS)October 2024 - May 2025 (7 months)Saint-Brieuc, FranceFeasibility analysis: Data size / response timePostgreSQL database testsMake.com scenarioNode.js backend developmentBackend deploymentReact Tailwind frontend developmentPublication and QA testing
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Education
- Computer Management Technician degreeAfpa2002
- ReactJs Specializationo'clock2022ReactJs (Class components et Hooks) Redux Middlewares Websocket Tailwind API Rest Axios