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

7 years of experience
17 projects online
5/5 on Malt

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

Who am I?

A cook first, a developer for 7 years

My name is Léo Guillaume. I retrained as a developer in 2017 and went on to earn an MSc in artificial intelligence and data at Epitech Rennes. Today I design the software small and medium businesses rely on every day, and I build it to last.

Tools still in use today

At Kodeva, I built three business apps for companies of 20 to 200 employees: they are still in production. At Izidoor, I developed the booking platform now used by around thirty sports and leisure organizations, and I became a shareholder. Since 2026, I have also been building the platform and AI assistants of PrePeers, a startup that helps 15 to 25-year-olds choose their path.

I start from your trade

I founded Dibodev in 2025 to work directly with small and medium businesses. Before writing a line of code, I put myself in the shoes of the person who will use the tool: their days, their habits, what wastes their time. Only then do I replace spreadsheets, paperwork and repetitive tasks.

One contact, a known price

You deal with me from the first call to maintenance, with no go-between. The price is set by a quote before work starts. The project is delivered in stages, so you can test the tool as it grows and adjust early.

At a glance

Company: Dibodev, sole proprietorship founded on June 20, 2025
Based in: Saint-Erblon, near Rennes (Ille-et-Vilaine, France)
Service area: Rennes, Ille-et-Vilaine and Brittany, and remotely across France
Experience: 7 years in the trade, with software still used in companies of 20 to 200 employees
Education: MSc Pro (master's level) in artificial intelligence and data, Epitech Rennes
Languages: French (native) and professional English

Listed as an Activateur France Num

Since October 2026

See my listing

My services are listed in the directory of Activateurs France Num, the French government's initiative to help small and medium businesses go digital. By joining the network, I made these commitments to businesses:

The first meeting is free, to understand your needs before any quote.
I tell you about the France Num aid and schemes that apply to you.
If I'm not the right person, I point you to another Activateur.

France Num is coordinated by the Directorate-General for Enterprise with the regions, the chambers of commerce, the chambers of trades and professional organisations.

Why work with an Activateur France Num? (in French)

In the press

November 5, 2026

Bretagne Économique, the news outlet of the Brittany chambers of commerce, published a profile of me: how I went from cook to developer specialising in AI, and the custom artificial intelligence I build for small businesses, schools and independent professionals, from guiding students to sorting emails automatically and analysing sales.

“Many businesses still think AI comes down to ChatGPT.”

Read the article (in French)

Find me elsewhere

Client review

A word from a client

Verified review · Malt, May 2026

« 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 French

See the review on Malt

Career

My background

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

Experience

Since June 2025Current
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.
- PrePeers (EdTech): an AI guidance platform built on conversational AI (LLM, RAG). Development of the B2C and B2B interfaces, the embedded chat, the .NET CRM integration and the analytics tracking. Results: about 82% of sign-ups completed and more than 1,100 sign-ups per quarter
- LEXIAL (international law firm · Paris, Brussels, Geneva): harmonized email signatures across the firm (custom management tool) and an optimized online presence for the founding partner
- DevLeadHunter: a prospecting automation chain, designed and built end to end (detection of businesses without a website, AI enrichment, automatic website generation, A/B campaigns with follow-ups, Stripe and Qonto payments). Results: 100% deliverability, about 66% open and click rates, about 33% conversion
- A2M Ôrizon Solution: a complete online presence built from scratch for a social care company (CMS-editable website, professional email, SEO, continuous deployment). Results: 4,000 visits, 1,000 unique visitors and regular contact requests
- NightForge: an autonomous orchestrator that runs AI coding agents (Claude Code, Cursor) in the background across 2 machines and 8 accounts, controlled remotely from an iOS app, with automatic recovery and quota optimization
- Nuxt
- Storyblok
- Python
- FastAPI
- Tauri
- Stripe
Since April 2026
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 build 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
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.

Skills

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