Custom management software
Scheduling, quotes and invoices, inventory, time tracking: a tool that replaces your spreadsheets and fits the way you work.
From €5,000
Freelance web developer in Rennes
I'm Léo Guillaume, an independent developer based near Rennes, France. I design websites, business applications and custom software for small businesses, SMEs and freelancers in Ille-et-Vilaine and Brittany, with a single point of contact and a price set before we start.
- 7 years of experience
- 17 projects online
- 5/5 on Malt
- Reply within 24h
- Free quote
- No commitment
What I do
Websites, apps and software for businesses in Rennes
A precise need rather than a catalogue: you describe your business, I suggest the simplest tool that solves the problem, and I build it.
Professional website
A clear, fast website that ranks well on Google and that you can update yourself.
From €1,500
Mobile app
An iOS and Android app for your field teams or your customers.
From €3,500
Automation and AI
Sorting requests, extracting data from your documents, automatic replies: AI built into your tools.
From €2,500
How I work
A freelancer in Rennes, without the travel
Whether you are in Rennes, elsewhere in Brittany or further away, the project runs the same way: remotely, with short video calls, and a tool you test as it takes shape.
Everything happens remotely
A first call on Google Meet or by phone, then a short check-in at every stage. You don't have to block half a day to host me, and the project moves faster.
A single point of contact
You talk to the person who designs and develops your tool, from the first call to maintenance. No sales rep, no project manager in between, no subcontracting.
The code and the data are yours
You receive the source code, the hosting access and documentation. If you ever want to change provider, nothing holds you back.
Prices
Prices known before we start
Every project is quoted at a fixed price in a free estimate. Here are the ranges seen on my projects, so you know where you stand before even writing to me.
Website
From €1,500
A showcase site of a few pages, fast and well referenced, that you update yourself.
Automation or small tool
From €2,500
A specific need: an automation, a dashboard or an AI integration in an existing tool.
- Most requested
Custom management software
€5,000 to €15,000
Scheduling, inventory, quotes, time tracking: most small business tools fall within this range.
Maintenance and improvements
€100 to €300 per month
Hosting, backups, updates and fixes. Larger improvements are quoted separately.
I also work by the day, on a time and materials basis: €400 per day.
The first call and the quote are free.
Net prices: VAT not applicable (article 293 B of the French General Tax Code).
Work
Projects delivered in Rennes and Brittany
A booking platform used by around thirty sports and leisure businesses, the website of a services company, two management tools still in production in SMEs, and my own products.
:quality(75))
WebsiteSaaSBusiness app
Izidoor
Sports & leisure booking SaaS platform
July 2025See the project
:quality(75))
Website
A2M Ôrizon Solution
Professional showcase website with CMS for social services company
December 2025See the project
:quality(75))
WebsiteSaaSBusiness app
Gest-Time
Work time management software for businesses
January 2022See the project
WebsiteSaaSBusiness app
Stockpme
Stock and inventory management software for SMEs
March 2022See the project
:quality(75))
SaaSBusiness appAISoftwareMobile app
DevLeadHunter
Automated Prospecting for Selling Websites to Tradespeople
October 2025See the project
:quality(75))
SoftwareBusiness appAIMobile app
GoupixDex
Scan, Price, and Sell Pokémon Cards on Vinted and eBay
April 2026See the project
Browse by project type
How it works
How a project works
One point of contact, from the first call to maintenance.
- Call
A free first call
We look together at how you work and what wastes your time. If existing software is enough, I will tell you.
- Quote
A clear fixed-price quote
Scope, price and milestones are set before we start: no bad surprises along the way.
- Development
Delivery in stages
You test the tool as the project progresses and your feedback is taken into account before launch.
- Support
Launch and follow-up
I import your existing data, train your team and take care of maintenance and improvements.
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 MaltFrequently asked questions
What people ask me before starting
How much does a freelance web developer in Rennes charge?
I work at a fixed price: a showcase website starts at €1,500, a mobile app at €3,500, a business application sits between €5,000 and €15,000 and an AI automation starts at €2,500. On a daily rate, I charge €400 per day. Net prices, VAT not applicable (article 293 B of the French tax code).
How long does a project take?
The timeline is set in the quote according to the scope. I deliver in stages: you use a first useful version quickly, then the tool grows with your feedback, without waiting for the end of the project.
Freelancer or web agency in Rennes: what is the difference?
With an agency, you talk to a sales rep then a project manager, and development is often subcontracted. With me, you talk directly to the person who designs and codes your tool, for a price without overheads and faster decisions. For a very large project involving several specialities, an agency remains a good choice.
Can you come to our offices?
I work remotely, on Google Meet or by phone, with regular check-ins. It is more efficient for you and for me, and it changes nothing to the quality of the follow-up: you see the tool progress at every stage.
Which technologies do you work with?
Nuxt and Vue.js for websites and interfaces, Node.js, Python and .NET on the server side, PostgreSQL for data, Tauri for desktop applications, and the OpenAI, Mistral and Anthropic APIs for AI. I pick widespread technologies, so that any developer can take over the project.
What happens after the launch?
You can stop there: the code and the access are yours. Most clients take a maintenance plan of €100 to €300 per month, which covers hosting, backups, updates and small improvements.
Do you only work with businesses in Rennes?
No. I'm based near Rennes, in Saint-Erblon, and I work with businesses across Ille-et-Vilaine (Rennes, Saint-Malo, Vitré, Fougères, Redon, Bruz, Cesson-Sévigné), Brittany and elsewhere in France. Since everything happens remotely, the city changes nothing to how the project runs.
Blog
Further reading
Three articles to choose your provider in Rennes and understand what I do on a project.
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Freelance Nuxt Developer in Rennes: What I Actually Do on Your Projects
Migrating from Nuxt 2, server-side rendering, SEO, AI visibility, and custom business applications: what a freelance Nuxt developer near Rennes actually delivers for your projects.
6 min read
Read article 
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Freelancer or Agency in Rennes: Which to Choose for Your Custom Business Tool?
Hiring a freelancer or an agency in Rennes for your custom software solution? A local developer gives an honest comparison of both options and explains when each makes the most sense.
5 min read
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Custom Business Application Developer in Rennes: Why Proximity Makes All the Difference
Entrusting your custom business tool to a freelance developer near Rennes: what proximity truly changes, with a real-world case study and an honest budget breakdown.
7 min read
Read article A web or software project in Rennes?
Describe your need in a few lines: I reply within 24 hours with first ideas and a budget range.
- contact@dibodev.fr
- 06 42 19 38 12
- Saint-Erblon, near Rennes