Plateforme SaaS B2B
Subscription online service for businesses: single sign-on to company accounts (SSO), real-time dashboards, programmatic access (API), links to contact management.
Made-to-measure development
Custom-built websites.
No off-the-shelf software.
Some projects don't fit any off-the-shelf software. For those, I build fully custom web applications: fast, able to absorb growth, secure, and shaped exactly to your business. You keep total control over your product.
5,0/5 · 66 verified reviews
50+ projects shipped
10 years of experience
In detail
Off-the-shelf software like WordPress or PrestaShop is perfect for 80% of projects. But for the remaining 20% — subscription online services (SaaS), platforms, dashboards, line-of-business applications, complex marketplaces — custom development becomes necessary. Not to look "more modern", but because it is the only way to get: native speed, with no superfluous software layer; an architecture that absorbs growth; security you control, free of the known flaws of widespread software; and code 100% shaped to the business.
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Custom development is justified when bending standard software would cost more than replacing it: pricing rules no module covers, a catalogue with unusual relationships, deep links to an ERP — the internal management software —, volumes that bring a generic tool to its knees. It is not justified for a standard catalogue, however large: PrestaShop then costs less and is easier to maintain. The real difference lies in what comes after.
With no community and no automatic updates, maintenance has to be planned from the scoping stage.
Features
What you get.
Method
How we proceed.
01
Defining the product
A workshop to pin down precisely what the application must do. User journeys, data organisation. Choice of technologies.
1-2 weeks
02
Laying the foundations
Architecture document: screens, server, database, hosting. Working, rehearsal and production environments prepared.
1 week
03
Designing the whole
Figma mockups of the entire journey, a set of reusable components, a clickable prototype to validate before coding.
2-4 weeks
04
Building in 2-week stages
A demo at the end of every stage: you watch the product advance. Automatic tests written in parallel, code systematically reviewed.
6-20 weeks
05
Putting it to the test
Everything is tested: features, behaviour under heavy load, security (audit against common flaws, OWASP). You sign off, I fix.
2-3 weeks
06
Launching and keeping it alive
Progressive opening to the public when relevant. Active monitoring. Fixes and improvements over the long term.
Ongoing
Real cases
A few examples.
Marketplace B2C verticalisée
Specialised marketplace: instant catalogue search (Elasticsearch), payment automatically split between vendors, complex approval flows.
FAQ
Frequent questions
Why build custom rather than use an off-the-shelf platform (CMS)?
For cases where an off-the-shelf platform becomes a brake: critical speed, heavy growth in traffic, very specific business rules, complex connections with your other software, high security requirements. If you have to bend your project to fit into a CMS, it's usually a sign it isn't the right fit.
How much does a custom-built site cost?
A simple first version (MVP): €15,000 to €35,000. Full web application: €35,000 to €100,000. Subscription platform (SaaS) or complex project: €80,000 to €250,000+. Billed by time spent (€600 to €800 per day) or at a fixed price, whichever you prefer.
What is the timeframe for a custom project?
First version: 2 to 4 months. Full application: 4 to 8 months. Very complex projects: 8 to 18 months. I work in short stages, with intermediate deliveries so you can validate progress regularly.
Which technologies should I choose for my project?
It depends on the project. Classic web application: PHP 8.2 with Laravel or Symfony, a MySQL or PostgreSQL database. Real-time exchanges: Node.js (WebSocket). A subscription platform built to grow: Next.js with a separate data layer. I recommend the technology suited to your context, not the trendy one.
And after launch?
Bug fixes, new features added over time, round-the-clock site monitoring. Fixed-price maintenance package or time-based billing. I hand over full documentation so you stay autonomous.
Can I take the code and switch providers?
Absolutely. The code belongs to you and lives in your own code repository (Git). Full documentation. No forced dependency on me or on a tool, unlike some closed platforms. That's one of my commitments.
See also
Related pages.
Let's start
Ready for your project?
Free quote within 48h. Response within 24h. No commitment.