WDA

Web apps & SaaS.
Users, roles, connected services.

We build software where people sign in, you add teammates or customers, and everything plugs into the tools you already use—payments, APIs, email, and more.

  • User Roles
  • Billing Flows
  • API Integrations

What we build

From user accounts to integrations.

Typical work: inviting users, admin vs. customer views, subscriptions when needed, and wiring your product to other services through APIs and webhooks.

Apps with real users

Invite people, assign roles (admin, member, guest) and keep each user seeing only what they should.

SaaS-style products

Sign-up, teams or accounts, plans and billing—when you need a product people subscribe to, not just a brochure site.

Admin screens

Back-office views for your team: manage users, review activity, and run day-to-day operations in one place.

Internal tools

Replace spreadsheets and email chains with one app: approvals, handoffs, and repeatable steps your staff actually use.

Client portals

A simple login area for customers or partners: requests, files, and status—without giving them your internal tools.

Connected data

Pull numbers and events from your stack into views and exports so decisions aren’t scattered across tools.

Technology stack

Built on modern tools your product can scale on.

For most web apps and SaaS projects, we rely on React, Next.js, and Tailwind as a reliable base for speed, structure, and long-term maintainability.

React

Component-based frontend architecture for app screens, flows, and reusable UI logic.

  • Reusable interface components
  • State-driven UI behavior
  • Scales cleanly as features grow

Next.js

Production web framework for routing, SSR/SSG options, and backend endpoints in one stack.

  • App routing + server rendering
  • API routes for product logic
  • Great fit for SaaS foundations

Tailwind CSS

Fast and consistent styling system for shipping polished interfaces without CSS sprawl.

  • Consistent design tokens
  • Responsive UI implementation
  • Clean long-term maintainability

Infrastructure services

Production services we often use.

We choose proven services based on your product needs and risk profile. This gives you reliable operations without exposing internal architecture details publicly.

Cloudflare

Edge protection, DNS, caching and traffic security layers for stable public delivery.

Vercel

Frontend hosting and deployment workflows with predictable release pipelines.

GitHub

Repository management and CI/CD workflow automation for stable delivery operations.

Supabase

Database and backend foundations for fast product iteration with clear data ownership.

Under the hood

The boring parts, done right.

Permissions, how data is split between customers, and how your app talks to other systems—we nail that early so adding users and services doesn’t become a mess later.

A.Who can do what

Logins and permissions are planned up front—so adding users and roles stays simple as you grow.

B.Separate customer accounts

When one product serves many companies, their data stays apart—standard for SaaS and B2B portals.

C.Features in clear blocks

We split the app into sensible pieces so you can ship updates without breaking everything at once.

D.APIs and integrations

Connect payments, CRMs, email, warehouses—clean hand-offs between your app and the services you already use.

E.Background jobs

Heavy or slow work (reports, imports, notifications) runs off the main screen so the app stays responsive.

F.Logs and health checks

Basic visibility when something fails—so we’re not guessing in production.

Budget & timeline

Three product stages, based on complexity.

For web apps and SaaS, fixed service buckets are less accurate than product stages. We use 3 plans (MVP, Growth, Scale), then add optional modules in the pricing calculator.

MVP web app

€4.000

Typical timeline: 4-8 weeks

First production-ready version with core user flows and integrations.

  • Scope workshop: users, roles, and must-have flows
  • Authentication + permission baseline
  • Core screens and workflow implementation
  • 1-2 integrations (payments, email, or external API)
  • Launch support + handover

Growth platform

€6.500

Typical timeline: 8-12 weeks

Expanded platform with admin operations, automations, and stronger architecture.

  • Multiple user roles + account model
  • Admin dashboard + operational screens
  • Subscription/billing flow integration
  • Background jobs and automation basics
  • Monitoring and stabilization sprint

Scale SaaS system

€10.000

Typical timeline: 12-20 weeks

Multi-tenant SaaS setup with scalable data boundaries and integration layer.

  • Tenant separation + advanced permission model
  • Modular architecture + API strategy
  • Queues, workers, and background processing
  • Observability baseline (logs, alerts, health checks)
  • Rollout/migration plan for production usage

FAQ

Quick answers.

Users, subscriptions, APIs, timelines, and what happens after go-live.

What is the difference between a website and a web application?

A website is mostly pages and content. A web app is software: people log in, you manage users, and data changes over time (orders, settings, workflows).

Do you build multi-tenant SaaS systems?

Yes—when many customers each have their own space in the same product, we design that separation from the start.

Can you integrate payments and subscriptions?

Yes. We connect providers like Stripe (or your stack) so plans, invoices and webhooks match how your product works.

Do you build admin dashboards and client portals?

Yes—internal tools for your team and/or a simple area for clients, with permissions so each side sees the right things.

How long does development take?

Roughly 4–24 weeks depending on how many user types, integrations and moving parts you need.

Can you migrate an existing product?

Yes. We plan the switch in steps and keep users working while data and features move over.

What technologies do you use?

We pick tools that fit reliability and integrations—no need for you to care about the buzzword of the month.

How do you handle security and privacy?

Sensible defaults: who can access what, separation between customers where needed, and monitoring so issues surface early.

Do you offer long-term support after launch?

Yes—fixes, small improvements, and help as your usage grows.