Custom Web & Web Application
Development
Custom web development for businesses that have outgrown templates: websites, headless storefronts and web applications built around how your team works. AvixDigital works with teams in the Netherlands, Germany, the wider EU, the UK and the US, using React, Next.js, Node.js, Webflow and WordPress.
Built for peopleResponsive design · Clear user journeys
Platforms & frameworks
Custom website development
We choose the platform from your goals, content workflow and integrations, then build a foundation your team can manage after launch. For theme-based stores and editable business sites, see our dedicated Shopify development and WordPress development services.
See it live: our Figma-to-Webflow build for Flow Storage, a self-storage company near Roermond. We also build headless Shopify storefronts as part of our Shopify development service.
Headless commerce with React and Next.js
When a theme starts to limit your storefront, a separate React or Next.js frontend can connect to Shopify or another commerce platform through its APIs. We assess your catalogue, markets and operations first and recommend headless only when the extra build, hosting and maintenance are justified.
- Next.js & React storefronts
- Shopify & headless CMS APIs
- Headless vs theme assessment
- ERP & inventory integrations
Webflow development your team can update
When design detail matters and your marketing team wants to publish without a developer, Webflow is a strong fit. We turn Figma designs into responsive, CMS-driven Webflow websites, adding custom JavaScript and GSAP interactions where they support the story without slowing the page.
- Figma to Webflow builds
- CMS collections & templates
- GSAP scroll interactions
- Client-First class structure
WordPress as a custom or headless CMS
WordPress suits content-heavy sites and teams who already know it. We build custom themes and components with ACF and PHP, or run WordPress as a headless CMS behind a Next.js frontend, with sensible plugin choices, accessible journeys and security hardening agreed for your hosting.
- Custom themes & components
- Advanced Custom Fields (ACF)
- Headless WordPress with Next.js
- Security hardening & updates
Web applications
Web application development & integrations
When a standard website cannot support your workflow, a custom web application can connect customers, staff and business systems. We build React and Next.js interfaces with Node.js back ends for client portals, dashboards and tailored business tools.
We start by defining the users, key tasks, data and integrations. That scope sets the architecture, testing plan and launch approach. Where an interface needs design work first, we prototype it in Figma through our UI/UX design service.
-
Front‑end & back‑end development
Secure API design and custom database work with Node.js, Express and MongoDB, structured so new features are easier to add later.
-
REST & GraphQL API integrations
Connect your application to CRMs, ERPs, payment providers and inventory tools, with agreed sync rules, error handling and data ownership.
-
Core Web Vitals optimisation
Performance testing and improvements to loading, interaction and layout stability. Results depend on the site, hosting and third-party services.
How we work
Our web development
process
-
01
Technical audit
We review your stack, content, data and integrations to decide what to keep, fix or replace.
-
02
Architecture & scope
We map data models, server logic and hosting, then agree milestones and an estimate before development starts.
-
03
Agile development
We build in short, reviewable sprints with React, Next.js, Node.js, Webflow or WordPress, so you see progress early.
-
04
QA & launch
We test key journeys across devices, check accessibility and Core Web Vitals, set up redirects, then plan a controlled launch.
/ Questions & answers
Custom web development FAQs
Clear answers on websites vs web applications, cost, timelines, technology and support after launch.
What is custom web development?
Custom web development means designing and building a website or web application around your content, workflows and integrations, instead of adapting a ready-made template. It suits businesses with specific user journeys, data or performance needs. Many projects still use a CMS such as WordPress or Webflow; the custom part is the structure, components and functionality built for your team.
What is the difference between a website and a web application?
A website mainly publishes information and guides visitors to act, such as reading, booking or getting in touch. A web application lets signed-in users complete tasks with their own data, for example a client portal, dashboard or booking system. Many businesses need both. Our website vs web application guide explains how to decide.
How much does custom web development cost?
Cost depends on scope: the number of page templates, custom features, integrations, content and the level of testing. A CMS-driven marketing website on WordPress or Webflow is usually a smaller investment than a web application with user accounts, dashboards and system integrations. After a discovery call, we share an estimate and milestones so you know what is included before work starts. See our typical starting prices.
How long does a custom website or web application take to build?
As an initial guide, a scoped WordPress or Webflow website or a standard ecommerce build may take 4–8 weeks, while custom-coded Shopify themes and web applications may take 8–12 weeks or longer. Integrations, content readiness and feedback affect delivery. We confirm milestones and an estimate after discovery.
Which technologies do you use to build web applications?
We work with React, Next.js and the MERN stack: MongoDB, Express.js, React and Node.js. The choice depends on your application, data model and integrations. Public pages and private dashboards have different rendering, indexing and access requirements, which we plan during discovery.
Can you integrate our CRM, ERP or other third-party APIs?
Yes. We build REST and GraphQL integrations between websites, web applications and business systems such as CRMs, ERPs, payment providers and inventory tools. Before quoting, we review API access, data ownership, sync rules and how failures are handled, so your team is not re-entering data by hand.
Do you offer website maintenance and support after launch?
Yes. After launch we can look after security and dependency updates, uptime and performance checks, and small improvements under a support arrangement agreed with you. The scope depends on your platform and hosting. If you would rather manage the site in-house, we hand over documentation and access so your team can take it over.
Still have a question?
Tell us what you’re building. You’ll get straight answers and a clear scope, timeline and price.
Discuss your projectFree estimate · No obligation
- Web applications
- React
- Next.js
- Node.js
- Webflow
- Headless commerce
- API integrations
- Core Web Vitals
More services
Explore other services
Most projects combine design, development and the right platform. See how the other services fit together.
All services-
Ecommerce
Shopify & Shopify Plus
- Shopify
Custom Liquid themes, storefront improvements and ecommerce integrations. A development approach shaped around your catalogue, customer journey and store operations.
Explore Shopify development – Shopify & Shopify Plus -
Content & commerce
WordPress development
- WordPress
- Elementor
Editable business websites, custom Elementor components and WooCommerce functionality. Give your team a site they can manage, with the flexibility your project needs.
Explore WordPress development -
Design
UI/UX & brand design
- Figma
User journeys, Figma prototypes and visual identity for websites and digital products. Clear navigation and thoughtful interfaces that guide people to their next step.
Explore UI/UX and branding – UI/UX & brand design