Léo Guillaume, full-stack and AI freelance developer near Rennes

I am the founder of Dibodev. I build custom business apps, management software, websites and AI automations for small and medium businesses in Rennes, Brittany and across France.

Discuss my project

Portrait of Léo Guillaume, full-stack and AI freelance developer near Rennes — Léo GuillaumeFounder of Dibodev, near Rennes

Who am I?

My name is Léo Guillaume. Before writing code, I worked as a cook. In 2017, I started retraining as a web developer, and in 2020 I turned it into my job by joining the Web@cadémie at Epitech Rennes as a work-study student, then went on to earn an MSc in artificial intelligence and data.

Since then, I have built tools people use every day: three business apps at Kodeva, still running in small and medium businesses, then the Izidoor booking platform, now used by around thirty sports and leisure organizations.

In 2025, I founded Dibodev to work directly with small and medium businesses. My goal: replace spreadsheets, paperwork and repetitive tasks with simple tools designed for the people who use them.

Since April 2026, I have also been on a mission for PrePeers, an EdTech startup that uses artificial intelligence to help 15 to 25-year-olds choose their path. I build the platform and the AI chats that guide students, all the way to partner schools' websites.

I work alone, in direct contact with you, from the first call to maintenance. Every project has a fixed price with a clear quote, and is delivered in stages so you can test the tool as the project moves forward.

At a glance

Company: Dibodev, sole proprietorship founded on June 20, 2025
Currently: Full-stack and AI mission at PrePeers, an EdTech startup, since April 2026
Based in: Saint-Erblon, near Rennes (Ille-et-Vilaine, France)
Service area: Rennes, Ille-et-Vilaine and Brittany, and remotely across France
Experience: 6 years of professional experience: work-study at Kodeva and Izidoor, then freelance
Education: MSc Pro (master's level) in artificial intelligence and data, Epitech Rennes
Languages: French (native) and professional English

Find me elsewhere

A word from a client

We asked Léo for help on a Nuxt project. I recommend him because he understood our needs very quickly and worked fast and efficiently. I particularly appreciated how easy he was to onboard and to communicate with.

GillesCTO of PrePeers

Client review published on Malt in May 2026, translated from FrenchSee the review on Malt

My background

Six years building tools people use every day, from work-study positions to my own clients.

Experience

Since April 2026Current
Full-stack and AI developer
PrePeers · Freelance mission, EdTech startup near Lyon
PrePeers helps 15 to 25-year-olds find their path with a conversational AI, then connects them with the schools that suit them. I am the lead developer of the platform's interfaces.
- End-to-end student journey: sign-up, profile and conversation with Lola, the guidance AI
- Lily, an AI chat embedded on partner schools' websites, and the schools' management area
- CRM integration in the .NET API and full analytics tracking of the journey, with about 82% of sign-ups completed
- Nuxt 4
- Vue 3
- TypeScript
- LLM
- .NET
- Azure
- PostHog
Since September 2025
Founder and freelance developer
Dibodev · Sole proprietorship, near Rennes
I design and build custom business apps, management software, websites and AI automations for small and medium businesses, at a fixed price.
- A2M Ôrizon Solution: a website with a CMS built from scratch, 4,000 visits since launch
- NightForge: an orchestrator that runs AI coding agents autonomously, controlled from a mobile app
- GoupixDex: AI recognition of Pokémon cards and automatic listing on Vinted and eBay
- Nuxt
- Storyblok
- Python
- FastAPI
- Tauri
- Stripe
January 2023 to July 2025
Full-stack engineer
Izidoor · Work-study, booking SaaS
A booking and management platform for outdoor sports schools: sailing, skiing, kayaking or surfing.
- Complete business back office: bookings, schedules, Stripe payments, point of sale and statistics
- An unstable product taken over and made reliable, now used by around thirty organizations handling thousands of bookings per season
- A contribution rewarded with equity: I am now a shareholder of Izidoor
- Nuxt
- TypeScript
- GraphQL
- PostgreSQL
- Stripe
- Docker
October 2020 to August 2022
Full-stack engineer
Kodeva · Work-study, software for small businesses
Three business SaaS apps built from scratch in an agile team, then distributed to companies by Breizhtic.
- Stockpme: stock and inventory management with QR labels
- Gest-Time: working time, timesheets and approval for field teams
- Still running in companies of 20 to 200 employees, replacing paper and Excel
- C#
- .NET
- Nuxt
- Vue.js
- SQL Server
- MongoDB

Education

2022 to 2025
MSc Pro, artificial intelligence and data
Epitech Rennes · Master of Science, work-study
A program focused on applying AI to real projects: NLP, fine-tuning models such as CamemBERT, processing large datasets. Projects: pneumonia detection on X-rays (CNN and KNN) and natural language travel planning.
- Python
- Machine learning
- NLP
2020 to 2022
Web@cadémie
Epitech Rennes · Two-year program, work-study
Intensive web development training: JavaScript, Node.js, APIs and databases, with projects deployed to production.
- JavaScript
- Node.js
- SQL
2013 to 2016
Vocational diploma in cooking
Notre-Dame hospitality high school, Saint-Méen-le-Grand · Before my career change
A first path in hospitality and catering, before retraining as a web developer in 2017.

What I can do

Skills built on projects running in production, from the first screen to the launch.

Web apps and SaaS
Business back offices, customer portals, dashboards and desktop apps that are fast and pleasant to use.
- Nuxt
- Vue.js
- TypeScript
- Tailwind CSS
- Tauri
Artificial intelligence
AI chats and conversational assistants, AI agents, data extraction from your documents and machine learning models.
- Claude
- OpenAI
- LLM
- RAG
- NLP
- Python
APIs, data and payments
Reliable APIs, well-structured databases, online payments and connections to your tools: CRM, emails, text messages.
- Node.js
- .NET
- FastAPI
- PostgreSQL
- Stripe
Launch and monitoring
Automated deployment, audience analytics and SEO, so the tool keeps living after delivery.
- Docker
- GitHub Actions
- PostHog
- Storyblok
- SEO