Web app
A web application built to scale, not to limp along
A custom web application — SaaS, internal dashboard, client tool — needs to hold up the day your business takes off, not just on launch day. We build robust web applications in Next.js and React, with authentication, billing and architecture designed from the start to grow with you, with no full rewrite six months later.
- Architecture designed to scale
- Authentication, billing and user roles included
- We can take over a fragile existing application
The problem
What a poorly architected application costs you
A patched-together tool works fine on day one. The problem shows up when it has to grow.
01
The prototype can't take the load anymore
A tool patched together to validate an idea breaks as soon as user numbers grow. Rebuilding the architecture under pressure costs more than building it properly from the start.
02
Authentication and roles are improvised
Managing who has access to what, and securing user accounts and recurring payments, requires a rigorous architecture. An improvised solution quickly becomes a security hole.
03
Poorly integrated SaaS billing blocks growth
Subscriptions, free trials, plan changes, compliant invoices: an approximate billing setup generates errors and unhappy customers who cancel.
04
A fragile legacy no one dares touch
Legacy code, poorly documented, with no tests, that the team dreads modifying for fear of breaking everything. Every new feature becomes a risk rather than an improvement.
Our answer
An architecture that lasts
Every web application we deliver is designed to support growth, not just to work in a demo.
Architecture built to last
Clear structure, separated responsibilities, well-designed database: your application supports growth in user numbers without a full rebuild.
Authentication and role management
Secure login, fine-grained permission management by role, two-factor authentication if needed: security best practices built in from day one.
Integrated billing and subscriptions
Connected to Stripe or an equivalent to handle subscriptions, free trials, plan changes and compliant invoices, without building from scratch.
Clear, actionable dashboard
Your users and your team see the information that matters, presented simply. A good dashboard saves time on every login.
Ready to scale
Infrastructure and code designed to absorb rapid user growth without performance loss or service interruption.
Taking over existing applications
We audit and take over fragile existing applications: fixing technical debt, securing the system, then evolving it calmly, without a full rebuild unless it's necessary.
Preview
The level of craft, live
The site you're browsing right now is built with the same technical rigor as our web applications: clean architecture, measured performance, documented code.
Process
From call to launch in 4 steps
01
Discovery
A workshop to define essential features, user roles and required integrations. Firm quote within 48h.
02
Design & architecture
Mockups of key screens and definition of the technical architecture and database. Two rounds of revisions included.
03
Development
Feature development, authentication and billing integration, testing. Tracked on a demo environment.
04
Launch & follow-up
Production deployment, data migration if needed, team training. Then 30 days of included bug-fix warranty.
Budget
How much does a custom web application cost?
A firm price after scoping. The range depends on the number of features, integrations, and architecture complexity.
from
€5,900
Custom web application, authentication and billing included. Free detailed quote within 48h.
- Dedicated technical architecture
- Authentication and role management
- Billing and subscription integration
- Custom dashboard
- 30 days of included bug-fix warranty
FAQ
Your questions about web applications
Our commitments, in writing
Quote within 48h
A detailed, firm estimate — not a vague range.
Code delivered, code you own
You walk away with the full Git repository. No hidden dependencies.
Maintenance covered
Fixes, updates, and monitoring after launch.
Revisions included
Every phase includes planned rounds of feedback in the quote.
Your project deserves an architecture built to last
Describe your application and your growth goals: a detailed, firm quote within 48h, free.
Response within 24h