Home / Services / Web App Development
We build fast, secure web apps: customer portals, internal dashboards and full SaaS products with subscriptions. Notion Tech designs and builds them in React, Next.js and Node.js, and we know what it takes to run SaaS because we run two products ourselves.
Everything a modern web app needs, built properly from the start.
Multi-tenant products with sign-up, subscriptions, roles and an admin area to run the business.
Logins where your clients book, pay, track jobs and download documents.
Dashboards and back-office apps that replace spreadsheets and email chains.
Live updates, notifications and messaging with Socket.io.
Stripe subscriptions, invoices, card payments and Australian GST handled correctly.
Role-based access, audit logs and exports that keep your data in your hands.
People judge software in the first minute: how fast it loads, whether the screens make sense, and whether it works on their phone. We design for that first minute and for the thousandth, with clear navigation, fast pages and forms that check themselves.
Behind the screens, a good web app is secure and boring in the best way. We separate each customer’s data, log important actions, back up automatically and watch the app after launch, so problems are found before your users notice them.
Rostery and AuditCore are subscription products we build and operate ourselves, with Stripe billing, onboarding, role-based permissions, help content and AI features. Building a SaaS product with us means borrowing everything we have learned shipping and supporting those platforms.
Multi-tenant data separation
Stripe subscriptions and trials
Admin console and support tools
Analytics and audit logs
AuditCore helps NDIS providers stay audit-ready: policies, staff compliance, incidents and risks in one place, with AI that checks evidence and prepares mock audits.
It runs on the same React and Node.js stack we use for client web apps.
Fixed scope, fortnightly demos, no surprises on price.
01
Users, goals and the core workflow, agreed with a fixed scope.
02
Clickable prototype tested with real users.
03
Front end, API and database built in two-week cycles.
04
Security checks, load tests and a staged go-live.
05
Analytics, support and a roadmap of improvements.
TypeScript
JavaScript
React
Next.js
Node.js
Express
Python
PostgreSQL
Socket.io
Tailwind CSS
Stripe
AWS
Docker
Still have a question? Talk to us.
A website mainly shares information. A web app lets people log in and do things: book, pay, manage data or run part of their business. Many projects combine both.
Yes. We build multi-tenant SaaS with subscriptions, onboarding, roles and admin tools. We run two SaaS products of our own, so we build with operating them in mind.
Yes. Every web app we build is responsive. If you need app-store apps too, we build them with React Native and share logic with the web app.
Encrypted connections, hashed passwords, separated customer data, role-based permissions, rate limits, audit logs and automatic backups, plus monitoring after launch.
On reliable cloud infrastructure, in Australia when your data needs it. We can host and support it or deploy to your own cloud account.
Tell us what you need. You will get honest advice and a clear next step.
Free first call. No obligation.
