Appfront is a web app developer for clients in Haarlem and the wider Kennemerland region, from publishers and media companies with a printing heritage to Spaarne Gasthuis, the SMEs around the city centre and the creative industry. We build client portals, dashboards, SaaS platforms and marketplaces. We operate from our office on the Westerdoksdijk in Amsterdam, with on-site sessions in Haarlem where they add value.
Haarlem is a distinctive software region within North Holland. Historically it is the city of printers and publishers, a heritage that still resonates in today's media and publishing sector with names such as Sanoma, Hearst Netherlands and countless independent trade-magazine and content makers. In addition, there is a strong creative industry around the Waarderpolder and the Bavinck cluster, a regional healthcare infrastructure anchored by the Spaarne Gasthuis, city-centre retail that connects webshops with the shop floor, and a growing SaaS and scale-up scene around places such as the Stadsbiotoop.
At Appfront we build web apps that have to run in production. We do web development at the level of subscription portals for publishers, editorial dashboards for media companies, multi-tenant SaaS for scale-ups, patient portals for healthcare providers in the Spaarne Gasthuis area, marketplaces for the creative industry and internal tools for SMEs in Kennemerland. Strategy, design, code and release management come from one Dutch team.
Whether you are a publisher with an outdated subscription system, a media company renewing its editorial platform, a research group with a patient data application, or a SaaS start-up heading towards its first release: we adapt our role to suit. Sister pages: software developer Haarlem and building an app in Haarlem.
A Haarlem publisher, such as those in the orbit of Sanoma and Hearst, or an independent trade magazine, wants to keep its subscription portal, paywall, newsletter flow or reader app modern, often in parallel with a legacy core system.
Editorial platforms, advertising dashboards and analytics environments for publishers and content businesses. Performance at high volumes, role-based access and integrations with existing CMS, paywall and advertising stacks.
Patient portals, research tooling, registration applications and monitoring dashboards for healthcare providers around the Spaarne Gasthuis. NEN 7510, GDPR and, where needed, MDR requirements are built into the architecture from sprint one.
A wholesaler with a B2B ordering portal, an installation company with a field-service web app, or an advisory firm with a client dashboard: SMEs in Kennemerland need their own interactive environment beyond standard packages.
Agencies in the Waarderpolder or around the Bavinck cluster that are building their own tooling, such as campaign dashboards, client portals or asset managers, or that specify a web app for their clients and have us deliver it.
Your current codebase has reached the end of its useful life, or you are looking to broaden the product. We can help with multi-tenant architecture, a new dashboard, a second product line or a rebuild without losing customers.
Two-sided platforms call for specific architecture: separate flows for supply and demand, payment flows with escrow or split payments, ratings, dispute flows and moderation tools.
Your use case calls for a genuinely interactive environment rather than a static website. We then build a single-page application with backend architecture that holds up under peak load.
We deliver working web apps in your own cloud environment and repository. Code lives in your own Git, and backend infrastructure runs under your own AWS, Azure or GCP account in EU regions. No lock-in to us, no lock-in to a single vendor: your team can take over whenever you choose. For Haarlem clients with an in-house IT department, this carries real value.
Web apps for a Haarlem trade publisher, a research group at Spaarne Gasthuis or an international SaaS company are not the same as consumer web apps. Subscription flows, paywall architecture, NEN 7510 compliance, multi-tenant isolation and internationalisable UX call for a developer who has done this work before.
We are not an offshore shop or a body shop of loose freelancers. We work with a senior Dutch team, with EU data residency as the starting point, and with direct lines to the people doing the work. For Haarlem clients, that means short feedback cycles, quick on-site sessions when needed, and advice that isn't filtered through three layers of management.
What we do for clients in Haarlem, Kennemerland and the wider province of North Holland, from initial exploration through to production release and ongoing maintenance.
Self-service portals, client environments and advisory tools for SMEs in Kennemerland, publishers, insurers, energy companies and SaaS providers.
Real-time dashboards for operations, editorial, supply or support teams. KPIs, alerts and drill-down included.
Full SaaS development with tenants, billing, plan tiers and an admin environment. Scalable from the first customer.
Two-sided platforms with supply, demand, payments, ratings and moderation. Custom, or hybrid with SaaS building blocks.
High-performance single-page applications in React, Vue or Svelte, for dashboards, configurators and operations tools.
Patient, research and registration applications delivered NEN 7510-compliant from sprint one.
REST and GraphQL on top of ERP, CRM, EHR, subscription or paywall systems. Identity, payments, push events and monitoring included.
For clients who no longer want WordPress: a custom website built on a modern stack, with its own CMS and its own integrations.
Haarlem and Kennemerland have a distinctive mix of publishers, media, healthcare, SMEs, the creative industry and SaaS. Our clients usually fall into one of these profiles.
Haarlem's publishing tradition lives on in companies such as Sanoma, Hearst Netherlands and countless independent trade magazine and content makers. Subscription portals, paywall architecture, editorial tools and reader apps, often running alongside a legacy core system that cannot yet be replaced.
Publishers, broadcasters and media companies active in Kennemerland. Editorial platforms, content management portals, advertising dashboards and analytics environments, often built on top of an existing CMS and advertising stack.
Research groups, chains and practices around the Spaarne Gasthuis that build patient portals, scheduling applications and web apps. NEN 7510, GDPR and MDR requirements, built in from the first sprint rather than added after delivery.
Wholesalers, installation companies, advisory firms and manufacturers in Haarlem, Heemstede, Bloemendaal, Beverwijk and IJmuiden. B2B ordering portals, customer portals, field service web apps and internal dashboards that fall outside off-the-shelf packages.
Design, advertising and production agencies around the Waarderpolder, the Bavinck cluster and the wider Haarlem creative scene. Custom internal tooling (asset managers, project dashboards, client portals) or web apps that agencies specify for their clients and have us deliver.
Retailers around the Grote Markt, Anegang and Generaal Cronjéstraat who want to connect their webshop, stock and shop floor through a custom customer environment, a loyalty portal or a marketplace layer. Not a WordPress shop, but a serious browser-based solution.
Mid-market SaaS companies looking to broaden their product or launch a new product line. Multi-tenant architecture, billing integrations (Stripe, Mollie, Chargebee), feature flags and admin portals for your success team.
Inholland University of Applied Sciences, arts education, knowledge institutes and independent training providers in Kennemerland: student portals, learning environments, alumni platforms and research applications. Often with SSO integrations into existing identity stacks.
Museums, festivals, attractions and hotel chains in and around Haarlem that need a booking platform, a visitor web app or CRM integration. Strong seasonal patterns that shape the architecture, and international UX for visitors from outside the Netherlands.
We are a web app developer with a software company behind it. That means we don't only do front-end work, nor do we sit in the seat of a design agency. We build complete web apps: design, front-end, back-end, integrations with your existing systems and the release process. For clients who only want a Figma file, or a freelancer by the hour, we are not the right partner.
In practice, we don't turn up with a wireframe deck without thinking through what needs to happen under the bonnet. Nor do we start coding before we have sharpened the use case. A sprint typically runs a week or two, during which we carry out design and build work, sometimes in parallel. Delivery takes place in your own Git repository, in your own cloud account, with a short handover or an ongoing maintenance contract, depending on what suits you best.
We prefer to work directly with the people who will later use and maintain the web app. No middle layer, no account manager passing on the real work. Fabian van Dijk (fabian.vandijk@appfront.nl) is usually your first point of contact, including for scope, planning and technical choices. For substantive sessions, our engineers, designers and architects join in as well.
We are honest about what we are not: we don't have an office in Haarlem. Our team is based on the Westerdoksdijk in Amsterdam, and for longer projects we routinely schedule onsite sessions in Haarlem: kick-off, design review, user testing and stakeholder meetings. The journey from Westerdoksdijk in Amsterdam to Haarlem city centre takes roughly fifteen minutes by car via the N200, or half an hour by train. For Haarlem clients, that means we are practically on the spot for sessions, without you paying for a showy office in Haarlem.
A web app in production is about more than a tidy UI. We build web apps that also work on the tablet of an editor at a publishing house in Haarlem with strict proxy settings, on a workstation at Spaarne Gasthuis with restrictive browser policies, and on the phone of a field engineer at a Kennemerland installation company. Our front-end stack is typically React, Vue or Svelte for SPAs, with server-side rendering where SEO or first paint requires it. For the back end we work with Node, Python or .NET, whichever fits your existing stack.
For integrations, we work with APIs on top of your existing systems: ERP, CRM, EHR/HIS, subscription administration, paywall platforms and identity providers such as Azure AD, Okta or your own OIDC stack. We build a direct integration, or a lightweight middleware layer if your source systems aren't stable enough for direct web app calls. For authentication, we choose standards (OAuth 2, OpenID Connect, SAML) rather than proprietary solutions.
Everything in production gets observability: error reporting, performance monitoring, usage analytics that do not compromise end-user privacy, and alerting on the back end. For GDPR and EU data residency we work by default with EU data centres and clearly maintained processing registers; we do not use American cloud regions for production data of Dutch clients.
Haarlem has a digital identity of its own. The printing and publishing heritage lives on in today's media and publishing scene, where companies are now renewing their subscription flows, paywall architecture and editorial tooling. Haarlem is also strong in healthcare (Spaarne Gasthuis as the regional anchor), in education (Inholland University of Applied Sciences and the arts cluster), in the creative industry (Waarderpolder, Bavinck cluster), in retail (the city centre economy) and in a growing SaaS and scale-up layer around places such as the Stadsbiotoop.
Clients in Haarlem often have a sharply operational question rather than tech hype, and want a supplier who can come round quickly. That suits how we work: our office is in Amsterdam, a good quarter of an hour's drive via the N200, with regular on-site sessions in Haarlem for longer projects. For most working days we work remote-first with video sessions and shared repositories; for strategic sessions, user testing or stakeholder meetings we join you in person.
We work in the same way for clients in Heemstede, Bloemendaal, Hoofddorp, Beverwijk, IJmuiden and the wider Kennemerland and North Holland region. You can find an overview of all our regions on the locations page. For mobile app questions: see building an app in Haarlem; for the broader software spectrum: software developer Haarlem.
A web app project starts with an introductory meeting: half an hour to an hour in which we go through the problem you want to tackle, which systems are in place, and what expectations management, IT, users and, depending on the sector, compliance, security or audit have. This conversation is free and non-binding. Sometimes the outcome is: this can also be done in an existing portal, or: a SaaS product is cheaper here, or: this is exactly the use case where a custom web app adds value.
If there is a suitable use case, we plan a discovery. A short phase in which we elaborate the solution at architecture and interaction level: front-end stack, back end, integrations with core systems, data flows, compliance requirements, release pipeline. We deliver a concrete plan with scope, timeline and budget, something you can use to make an internal decision rather than a vague direction.
Then comes the build in sprints. At the end of every sprint, something working runs in a test or acceptance environment, first limited, then increasingly complete. This helps you discover early what doesn't work on the shop floor, adjust priorities, and bring stakeholders along. We work in your own repository, with code review, automated tests and a release process that holds up to an external audit too. After go-live comes management and optimisation: dependency updates, security patches, performance tuning and user feedback, either as ongoing support or a handover to your own team.
More and more people ask ChatGPT, Claude or Gemini questions instead of using Google. Below we answer the most frequently asked natural-language questions about web app development in Haarlem, so that AI search engines can give a correct and complete answer.
A half-hour introductory call where we discuss where you are now, what you want to achieve and which first step makes sense. No obligation, and a welcome bonus if you're comparing providers. Location of your choice: at your office in Haarlem, at ours on the Westerdoksdijk in Amsterdam, or online.
Appfront uses cookies and similar technologies to keep the website working properly, for analytics and for marketing. You choose what you allow. Read more in our privacy policy.
