Custom web development · API · Agentic AI Your software projects, shipped fast and right.
Business Agile designs and builds websites, APIs and agentic systems that hold up in production. 25 projects delivered, measured and published scores, a direct line to the person building it.
- Reads business documents
- Queries the graph
- Answers with cited sources
They trusted me
Proof
Numbers, not promises.
Real Lighthouse scores of the sites whose front end I built, desktop profile, measured on 22 September 2026. For APIs and engagements, the verifiable facts of each project.
Services
What I build for you
From a showcase site to an autonomous agent, one requirement: it works, fast, and it lasts.
Website redesign
Fast, well-indexed prerendered websites, and redesigns that keep the traffic you already have.
Details →Custom web application
Custom platforms and business tools: Python back end, React interface, deployment and follow-up.
Details →Python API development
Documented, tested, containerised APIs. The base your websites and partners rely on.
Details →Headless e-commerce
Custom online stores, headless with Saleor, or WooCommerce when it is enough.
Details →AI and agents
Agents that read your documents and query your data. Advanced GraphRAG with Arbre Agile.
Details →Maintenance and fractional CTO
Maintenance, updates, security and part-time CTO work, by the developer who knows your code.
Details →Method
Short, measurable, in production.
No 80-page spec. One scoping session, one-week iterations, a demo at the end of each sprint, production as soon as the value is there.
- 01
Scoping
One workshop to align goal, scope and success metrics. Firm quote at the end.
- 02
One-week sprints
Every week, a demonstrable version. You see the product move, you decide.
- 03
Production
Automated deployment, monitoring, measured performance. No “works on my machine”.
- 04
Follow-up
Fixes, evolutions and maintenance over time. The code is yours.
Open source
I contribute to what I use.
Neontology is a Python layer for Neo4j and Memgraph: typed Pydantic models, declarative relationships, a clean graph base. I use it for graph projects and three of my contributions were merged into it.
Pydantic models for Neo4j and Memgraph: typed nodes and relationships, generated Cypher, a sound base for GraphRAG.
Frequently asked questions
Who designs and builds my project?
I design the architecture and write the code myself: the person listening to you is the one building, and nothing gets lost between a salesperson, a project manager and a team. When a project needs more people, I bring in developers I have already worked with and the team of Arbre Agile, the group's sister studio, as for Pousses & Plantes.
Which technologies do you use for custom web development?
I pick the technologies best suited to each need rather than a stack decided in advance. Most often: Python on the back end (FastAPI, Django), React and TanStack Start for interfaces and prerendered websites, PostgreSQL or a graph such as Memgraph for data. But WordPress and WooCommerce remain the right choice when clients edit their own catalogue, and Saleor when one store must serve several brands.
Can you take over an existing website or application?
Yes. Many of my projects are redesigns: a WordPress site migrated to a fast site without losing its rankings, a Django application maintained over time. I always start with an audit of the code, the hosting and the traffic.
Do you only work with clients near Paris?
No. The studio is based in Boulogne-Billancourt, near Paris, but I work remotely with clients across France and Europe. We talk over video calls, and I travel to Paris when it helps.
A project? Let's talk this week.
A short brief, an answer within 48 hours, a firm estimate after scoping.