Custom web application

Thecustom web application is our most technical service: SaaS, client portal, business platform, intranet, marketplace, lightweight ERP. This is what we build when a showcase site or e-commerce store is not enough — when you need a web application that executes complex business logic, manages users, automates processes, and evolves over time.

For which projects?

• B2B SaaS : a business tool sold as a subscription to other companies (sector-specific CRM, schedule management, automated quote generation…)
• Recommended version : authentication, dashboard, document upload/download, encrypted messaging (for attorneys, accountants, and medical practices)
• Business platform : construction project management, multi-warehouse inventory management, job scheduling, property rental management
• Marketplace : vendor/client marketplace with intermediated payment (Stripe Connect)
• liberal professions : employee portal, HR management, leave requests, expense reports
• Mobile application via PWA : installable smartphone app without going through app stores (saves the 30% App Store/Play Store cut)

Our technical stack

Depending on the need: WordPress with in-house plugins for simple projects with an editorial CMS, Laravel or Symfony for complex PHP applications with REST/GraphQL API, Next.js or Astro for fast front-ends typical of modern SaaS products, Node.js + Fastify for real-time APIs. Databases: MySQL, PostgreSQL, MongoDB depending on the case. Hosting: LiteSpeed/Cloudways/OVH based on constraints (GDPR, HDS, performance).

Our custom application methodology

1. In-depth functional scoping (2–5 days) : user story workshops, identification of critical flows, MVP prioritization.
2. Interactive UX/UI mockups (1–2 weeks) : Figma wireframes, user journey validation with your target users.
3. Development in sprints (4–12 weeks) : weekly deliveries, client demos, progressive adjustments.
4. Testing + qualification (1–2 weeks) : functional testing, load testing, security testing (OWASP Top 10).
5. Production deployment + training (1 week) : deployment, administrator and user training, technical documentation.
6. Support and updates : corrective maintenance included for 3 months, updates from the catalog.

When to choose a custom application over an off-the-shelf SaaS?

If an existing SaaS covers 80% of your needs and the remaining 20% are not strategic, go with the SaaS — lower cost, lower risk. If your requirements are genuinely specific (your business has its own logic that no off-the-shelf product covers) OR if you want to sell the solution to others (build a SaaS), a custom application becomes the right choice. We help you decide honestly during the scoping phase.

Available for 100% remote or on-site engagements

For custom applications, the video call + Git repository workflow works very well: we work with clients throughout the Var (Toulon, Hyères, Carqueiranne, Fréjus…) with weekly video check-ins. On-site presence available on request for the initial scoping and demos. See our network of 19 Var towns.