Custom web application development for businesses held back by off-the-shelf software, spreadsheets or an outdated system. We design and build web applications around your own processes: customer portals, internal tools, SaaS platforms and real-time applications that run in any browser, with nothing to install.
- Built around your process: not a package you have to work around, but software that does what your business needs.
- Fast: short load times and good Core Web Vitals are a requirement from design onwards, not an afterthought.
- Secure: roles and permissions, encryption and protection against common attacks from day one.
- Integrated: with your ERP, CRM, accounting or e-commerce platform through APIs.
Why a Custom Web Application?
Off-the-shelf SaaS and no-code tools are fine to start with. A custom web application becomes worthwhile when:
- your team spends more time on workarounds than on the work itself;
- data is scattered across spreadsheets, separate tools and email;
- you want to give customers or partners their own environment, with your workflow and branding;
- per-user licence costs keep rising while the package only half fits;
- the software itself is the product you sell.
A web application runs in the browser: users install nothing, updates reach everyone instantly and the application works on laptop, tablet and phone.
How We Build Your Web Application
- Discovery. We discuss what the application needs to do, who it is for and which systems it has to work with.
- Design and architecture. Screens, data model, roles and integrations are captured in a design you review before development starts.
- Short development sprints. After each sprint you see working software in a staging environment and can course-correct. We start with the core and expand from there.
- Go-live. With automated tests, monitoring and a deployment pipeline, so new versions go live safely.
- Operations and evolution. Hosting, updates, security and new features, if you want us to.
Web Applications We Build
Customer and partner portals. A dedicated environment where customers, suppliers or partners view orders, documents, invoices and status. Every user type only sees what it is allowed to see; permissions are enforced in both the interface and the backend.
Internal tools and business applications. Planning, registration, workflows and admin screens that replace spreadsheets and manual work. Read more about internal tools.
SaaS platforms. When your web application is the product, you need multi-tenancy, subscriptions, billing and scalability from the start. See SaaS platform development.
Progressive web apps (PWA). A PWA is a web application that behaves like an app: installable on the home screen, usable offline and with push notifications, without app stores. For many businesses a faster and cheaper route than a separate mobile app.
Real-time web applications. Dashboards, monitoring and collaboration tools where data updates live over WebSockets. See also real-time dashboards.
The first version of a new product. Want to test an idea with real users quickly? Start with an MVP that can grow later.
Web Application Architecture
Good architecture determines how easy your web application is to maintain, extend and scale later. We choose the technology per component, based on what the application needs to do:
- Frontend: React with Next.js and TypeScript. Server-side rendering where speed and search visibility matter, a single-page application where interaction is central.
- Backend: Rust for maximum speed and many concurrent users, C# / .NET for complex business logic and Microsoft environments, PHP for applications that need to be built fast.
- Data: PostgreSQL, MySQL or SQLite, with Redis for caching and sessions.
- Infrastructure: Docker and automated deployments, so staging and production are identical.
Fast and Secure
Speed. Small bundles, lazy loading, optimised images, caching and a CDN where it helps. On the backend: efficient database queries and caching in the right places. We measure during development, not after launch.
Security. Passwords are hashed securely, sessions are managed properly and sign-in can use OAuth2/OpenID Connect and two-factor authentication. Input is validated and output encoded, so SQL injection, XSS and CSRF don't stand a chance. Personal data is handled in line with the GDPR.
Integration with Your Systems
A web application rarely stands alone. We connect it to your ERP, CRM, accounting or e-commerce platform through API integrations, and where needed build a dedicated API for your application, mobile app or partners: see custom API development.
Frequently Asked Questions about Web Application Development
What is the difference between a website and a web application?
A website is mainly for reading: information, pages, perhaps a contact form. A web application is for working: users log in, enter data, start processes and see their own data. Think of a customer portal, a planning tool or a SaaS product.
Web application or mobile app: which do I need?
For most business use cases a web application is the best start: one codebase, works on every device and no app store needed. A PWA adds many app features, such as offline use and push notifications. A native mobile app makes sense when you rely heavily on the phone itself, such as the camera, Bluetooth or background tasks.
Can you take over or modernise an existing web application?
Yes. We start with an assessment of the code, architecture, security and performance. Then we improve the existing application or replace it step by step, without your users being left stranded. See also legacy modernisation.
Where does the web application run?
Wherever you want: on your own servers or with a cloud provider of your choice. We can also take care of hosting, monitoring and updates for you.
Do we own the source code?
You can. Ownership of the source code is set out in the contract, and the code can be fully yours, including documentation and tests.
Let's Build Your Web Application
Whether you are starting from scratch, replacing a system your business has outgrown or adding a web application on top of an existing system: we think along from the very first conversation.