Custom Web Development
Four tiers based on your needs: a showcase site with an integrated business tool, a custom e-commerce store, an internal software for your company, or a SaaS platform to commercialise.
A clear process, readable steps
From discovery to delivery, you know exactly where your project stands.
Specifications
We analyze your functional and technical needs. We write the spec sheet, user stories and wireframes together.
Proof of Concept
For complex projects, we build a POC to validate technical choices before committing to full development.
Agile development
Development by iterations. You follow progress on a test environment and can validate at each step.
Your team puts it to work
Production launch, final tests, team training: the tool runs from day one. Documentation provided, and the project belongs to you.
Specifications
We analyze your functional and technical needs. We write the spec sheet, user stories and wireframes together.
Proof of Concept
For complex projects, we build a POC to validate technical choices before committing to full development.
Agile development
Development by iterations. You follow progress on a test environment and can validate at each step.
Your team puts it to work
Production launch, final tests, team training: the tool runs from day one. Documentation provided, and the project belongs to you.
Numbers, not buzzwords
custom projects delivered since 2025
of the code delivered on our custom projects, you own it
public: Celeste Motors and SwissMcars
generic WordPress site: only custom
Great experience with SDR Web! Complete redesign of my site + custom admin area to manage my projects: everything is smooth, fast and well thought-out. Highly recommend.
Marion Gs
Client · Google review ★★★★★
Our work
Websites that generate real results for our clients.
Our custom development packs
"From" pricing: your precise quote depends on your specs. Free audit before pricing.
Custom E-commerce Store
Ideal for: Large catalog, stock and logistics. For a simple store, the Sérénité + Tool Plan is enough.
Delivered in 4-8 weeks
Firm quote after specs
Then Pilotage from €129/month, no commitment- Shopify custom theme OR fully hand-coded store
- Stripe + Apple Pay + Google Pay setup
- Optimised mobile checkout (< 3 steps)
- Catalog + variants + stock management
- Product SEO + Schema.org Product
- Transactional emails (order, shipping, abandon)
- GA4 + Meta Pixel + server-side tracking (GTM)
- Source code delivered, you own it
Custom Business Software
Ideal for: Your internal software: CRM, ERP, workshop, HR platform…
Delivered in 6-12 weeks
Precise quote after specs
Then Pilotage from €349/month (optional, no commitment)- Complete signed specs document
- Single-tenant app (dedicated instance, no multi-client)
- Custom architecture (React/Next.js, NestJS, PostgreSQL)
- Authentication + fine-grained user roles
- Custom business modules (workflows, states, reports)
- REST API to integrate your existing tools
- Automated tests + deployment + monitoring
- Source code delivered, you own it
SaaS / Multi-tenant Platform
Ideal for: You're launching a subscription product to sell to multiple clients
Delivered in 2-3 months
Precise quote after specs
Then Pilotage Pro from €549/month, no commitment- Multi-tenant: each client has isolated workspace
- Stripe Subscriptions (plans, upgrade, churn)
- User onboarding + transactional emails
- Global admin + client dashboard
- Webhooks + public API + OpenAPI docs
- Pro GDPR: DPA, audit logs, user exports
- E2E tests + CI/CD configured
- Pilotage Pro recommended after (€549/mo)
Does this sound familiar?
The frustrations we solve every week for our clients.
Your internal tools are slowing you down
Shared Excels, Notion that lags with 5,000 rows, SaaS subscriptions stacking up. At some point, a custom tool costs less than a Frankenstein of templates.
Your clients deserve better than a Wix
Modern client portal, online booking, configurator, tracking dashboard, custom CRM... These features impossible with no-code attract premium clients.
You want to sell, not just exist
Marketplaces, SaaS, auction platforms, B2B tools with Stripe subscriptions. If you want to monetise and scale, custom is the only path.
Everything you need, nothing extra to buy
No "basic" pack that becomes "premium" next week. Everything is included.
Modern stack
React, TypeScript, Node.js, PostgreSQL: proven, performant technologies maintained for the long term.
User management
Authentication, roles and permissions, custom dashboards. Every user sees exactly what they need to.
Scalable architecture
We design your app to handle the load, even with thousands of users. Cloud infrastructure when needed.
API integrations
Connect your tool to existing services: payment (Stripe), mailing (Brevo), CRM, ERP, or any third-party API.
Advanced security
Our cybersecurity expertise applies to your developments: HTTPS, XSS/SQLi protection, security audits.
Maintenance & evolution
We stay available after delivery to fix, improve, and evolve. Your tool grows with your business.
Your application lives on: we keep it running for you.
Monthly improvements, monitoring, guaranteed support within 24 working hours: Pilotage plans take over after launch. From €129/month, no lock-in (30-day notice).
Discover Pilotage plansEverything you want to know before booking
Ready to see what it would look like with us?
15 minutes on the phone to scope your needs and propose the right solution. No commitment, no follow-up.
Slots available this week
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