Web & mobile apps in Nantes, from concept to deployment
Web and mobile development in Nantes: custom applications, native or cross-platform. A modern approach where AI speeds up every step, from prototype to production.
Web & mobile development: what you can hand over to me
New builds, legacy takeovers, consulting or team leadership. The scope adapts to the project, and you keep a single point of contact.
From-scratch Development
Complete creation of your digital project, from idea to production
- Scalable architecture
- Modern technologies
- Native AI integration
- Automated DevOps
Legacy & Modernization
Modernization of existing applications with the latest technologies
- Complete technical audit
- Progressive migration
- Performance optimization
- Enhanced security
Tech Consulting & Strategy
Technical expertise to define the best approach for your projects
- Architectural audit
- Technology choices
- Technical roadmap
- Cost optimization
Team Leadership
Building and leading development teams for ambitious projects
- Developer recruitment
- Technical management
- Project coordination
- Team mentoring
Client/Dev Mediation
Technical interface between your business needs and development teams
- Needs translation
- Quality monitoring
- Clear communication
- Conflict management
Hybrid Approach
No Code, Low Code or traditional development, whichever the project actually calls for
- Fast prototyping
- Contained costs
- Easy to adjust
- Scales if the project grows
Your innovation projects, partly funded
Sergent.dev is accredited for the French Innovation Tax Credit (Crédit d'Impôt Innovation, CII) through 2030. If your SME entrusts me with designing a prototype or a pilot installation of a new product, my invoiced work counts toward your innovation tax credit.
This accreditation (no. 31881669), granted for the years 2026 through 2030 by the French national CII expertise unit, certifies the ability to carry out innovation work on behalf of third parties. I help you identify the eligible share of your project and provide the supporting documents for your tax filing.
Scheme reserved for SMEs under the EU definition, subject to project eligibility.
Check your project's eligibilityThe tools I actually use
This list moves with the projects. Here is what currently runs on mine, from the front end to the databases.
Frontend & Mobile
- React / Next.js
- Vue.js / Nuxt.js
- React Native
- Flutter
- TypeScript
- Tailwind CSS
Backend & API
- Node.js / Express
- Python / Django
- PHP / Laravel
- GraphQL / REST
- Microservices
- Serverless
Cloud & DevOps
- AWS / GCP / Azure
- Docker / Kubernetes
- CI/CD Pipelines
- Terraform
- Monitoring
- Load Balancing
No Code / Low Code
- Bubble.io
- Webflow
- Zapier / Make
- Airtable
- Notion API
- Retool
Artificial Intelligence
- OpenAI GPT
- Claude AI
- LangChain
- Vector Databases
- RAG Systems
- AI Workflows
Databases
- PostgreSQL
- MongoDB
- Redis
- Supabase
- Firebase
- Prisma ORM
AI, used with judgment
I lean on AI for what automates well: code generation, tests, documentation. Whatever ships to production is still read and understood by a human.
AI on the business side, for companies that want to use it day to day, lives on sergent.ai, in French (opens in a new window). That site is in French.
How a project actually goes
Six steps, always the same. At any point you know what is done, what is in progress and what remains.
Analysis & Discovery
In-depth audit of your needs, technical constraints, and business objectives
- Existing technical audit
- Needs analysis
- Strategic recommendations
- Detailed estimate
Architecture & Design
Design of technical architecture and user interfaces
- Technical architecture
- UX/UI mockups
- Functional specifications
- Development plan
Development
Iterative development with continuous integration and frequent deployments
- Versioned source code
- Technical documentation
- Documented APIs
- Dev/test environments
Testing & Validation
Automated testing, quality validation, and acceptance testing with end users
- Automated tests
- Code quality audit
- User testing
- Performance optimizations
Deployment
Secure production deployment with monitoring and rollback plan
- Production deployment
- Monitoring setup
- Team training
- User documentation
Support & Evolution
Continuous maintenance, fixes, evolutions, and optimizations
- Technical support
- Fixes & evolutions
- Optimizations
- Tech watch
Is your team looking to upskill? I also run React and Next.js training in Nantes, for schools and companies alike.
I build it, I host it too
Once delivered, your application can stay with me. Servers I administer, backups, updates, monitoring. One person responsible, from code to production.
Let's talk about your project, voice to voice
Three ways to get started, depending on where you are in your thinking.
Development projects
Web and mobile applications built with modern technologies
MO Estate - Real Estate Agency in Koh Samui
Public website and management platform for MO Estate, a real estate agency in Koh Samui, Thailand: nightly villa rentals, sales, online bookings, accounting and staff management.
- Next.js
- React
- Strapi
- +3
Cavavin - Interactive Wine Quiz
National wine shop franchise. Took over and updated a ReactJS and Strapi web app for a wine quiz.
- ReactJS
- JavaScript
- Strapi
- +3
QRaze - QR Code Generator and Tracker
Web application built with Next.js and TailwindCSS to generate and track QR codes.
- Next.js
- React
- TypeScript
- +5
Frequently asked questions
Yes, we build mobile apps (React Native) alongside web apps when it best serves your use case.