Custom web apps, PWAs and customer portals in React – running on the same proven backend that powers our mobile apps.
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Whether you need a browser-based tool for your team or a portal your customers use every day – these four building blocks cover most web projects we take on.
We build custom web applications with React and comparable frameworks – responsive interfaces that work on every screen size and are tailored to your workflows instead of forcing you into someone else's. From planning tools to data-heavy dashboards, you get software that fits.
A PWA installs straight from the browser, works offline where needed and reaches users through a simple link – no app store required. It is often the fastest way to put an app-like product into your users' hands, on desktop and mobile alike.
Login areas, role-based permissions, dashboards and admin panels: we build portals where your customers help themselves and internal tools that replace spreadsheet chaos – connected to your existing systems through REST or GraphQL APIs.
Our web apps run on the same backend architecture as our mobile apps: Go, .NET or Node.js on Google Cloud Run, plus Firebase or Supabase where they fit. Add a mobile app later without rebuilding anything – and for pure marketing sites, we work with WordPress.
Together these four apps have passed 500,000 downloads. Where they run on cloud backends – Go on Cloud Run for Klaimo's geo calculations, .NET with live DATEX II data in the charging and electricity price app – those are exactly the services a web app or PWA would plug into as well.
Cloud-based time tracking with geo-fencing — built for teams spread across several sites and held to strict compliance rules.
Real-time transparency on charge points and electricity prices, built on AFIR-compliant DATEX II data.
An Android app that works through entire call lists on its own — wired straight into the operating system's telephony stack.
A bike-tracking app where every ride claims real territory on the map — with leaderboards, teams and a live map.
Clear scope, agile milestones, transparent pricing
Off-the-shelf software is fine until your processes stop fitting its assumptions. Then teams start copying data between tools, paying per seat for features nobody uses, and bending workflows around the product instead of the other way round. A custom web app maps your actual process: users open a URL, log in and work – no installation, no version chaos, one interface for exactly the tasks that matter. And with progressive web app development, that same app can be installed from the browser and keep working offline, without ever going through an app store.
We keep web application development lean and verifiable. Most projects start with an MVP – the smallest version real users can work with – and grow in agile milestones, so you see working software at every stage instead of a big reveal at the end. The front end is typically React; behind it we run Go, .NET or Node.js services on Google Cloud Run, with Firebase or Supabase where they fit, connected through REST or GraphQL APIs. Because that is the same backend architecture our mobile apps use, a web app you build today can share its data and logic with an iOS or Android app tomorrow – nothing gets rebuilt. You own 100% of the code, and we work remotely with teams across Germany and internationally from our base in Regensburg.
What determines the price is scope, not mystery. An MVP typically lands between €2,700 and €6,000, a full business application between €7,000 and €13,000, and complex platforms start at €20,000. The main cost drivers are the number of user roles and views, integrations with existing systems, offline capability and how much custom interface design you need. If a WordPress site or standard software would serve you better and cheaper, we will tell you – before you spend money on development.
Four steps from idea to release — with clear milestones and a working build at every stage, so you always know exactly where your project stands.
Goals, scope and architecture defined properly — including an honest read on effort, risks and the budget range.
Clear, usable interfaces that make sense without a manual.
Frontend, backend and APIs in clear milestones — after every step you get a version you can actually run.
Testing, store release and a clean handover — full source code included.
Every project is different, but you deserve a real number before the first call: three realistic price ranges to orient you — your actual cost range is fixed before the project starts, not after.
Proven technology instead of experiments at your expense — chosen for what your project actually needs.
Cross-platform frontend for iOS and Android
Auth, real-time data and backend logic
Scalable services, built with Go and .NET among others
Direct access to the operating system
Interactive maps and geodata layers
Subscriptions, monetisation and insights
Our price ranges are public: an MVP runs €2,700–6,000, a full business application €7,000–13,000, and complex platforms start at €20,000. Where your project lands depends on the number of screens and user roles, integrations with existing systems, and features like offline mode or real-time updates. After a short call you get a written estimate with a fixed scope – and you own 100% of the code either way.
A progressive web app (PWA) is a web app users can install straight from the browser – it gets an icon on the home screen, loads fast and can cache data for offline use. It is the right choice when you want app-like convenience without app-store distribution: internal tools, B2B portals, or products where sending a link beats asking people to install something. If you later need deep device access, the shared backend makes adding a native app straightforward.
A website presents – a web application does. If visitors mainly need information about your company, a WordPress site is usually the faster, cheaper answer, and we build those too. A web app is worth it when users log in and work with data: managing orders, tracking time, viewing dashboards. In the first conversation we help you sort this out honestly – selling you a web app you do not need helps nobody.
Yes – that is exactly how we build. Our backends run as Go, .NET or Node.js services on Google Cloud Run and expose REST or GraphQL APIs that browser front ends and mobile apps consume alike. Start with a web app today and add an iOS or Android client later, or the other way round – the business logic, database and user accounts stay in one place instead of being duplicated.
In most projects that is the point. We integrate through REST and GraphQL APIs and have connected external data sources in production – for example the European DATEX II standard for charging-station data in our charging and electricity price app. Whether it is your CRM, an ERP or a partner API: if there is an interface, we can build against it, and if there is none, we discuss realistic workarounds before the project starts.
That depends on scope, which is why we start small: an MVP – the smallest version real users can work with – is typically ready within a few weeks. From there the app grows in agile milestones, each one delivering working software you can test and redirect. You always know what is being built next and what it costs. And from the very first message, we reply within 24 hours Monday to Friday.
Tell us what you want to build – we reply within 24 hours (Mon–Fri) with an honest assessment and a clear price range. Free and with no strings attached.
📅 Book a free consultationSB-Techworks · Karim Belkacem · Lilienthalstr. 38, 93049 Regensburg, Germany · remote, on-site meetings by arrangement
