Frequently asked questions

BugFyx is the software company of Patrick Willemsen from ’s-Hertogenbosch, the Netherlands. I maintain and secure apps built with AI, for example with Lovable, Bolt.new, v0, Replit, Cursor or Claude: I fix bugs, close security holes and take care of hosting, database, monitoring and backups. I also build custom SaaS and web apps: projects start at €5,000, and you get a fixed price up front. You always work with me directly, with fixed prices and response times in writing.

For founders without a technical background who built an app with AI, for small and medium-sized businesses with an internal tool they made themselves or with AI, and for start-ups with a new app that is going to market. What they have in common: the app works, but they want someone who takes care of security, database and hosting and can be reached when something goes wrong.

I take over apps built with Lovable, Bolt.new, v0, Replit, Cursor, Claude or another AI tool. The technology underneath is usually React, Next.js or Vue with TypeScript, and a database in Supabase, Firebase or PostgreSQL. Node.js, Python, Java and Spring Boot are familiar ground too.

BugFyx is based at Siloweg 3 in ’s-Hertogenbosch, the Netherlands. I work for clients across the Netherlands and abroad, mostly remotely. If you are in the Den Bosch area, we can also meet in person.

Yes. I work in Dutch and English, and I explain technical matters without jargon.

The App Check is an inspection of your app for a fixed price of €600 excl. VAT. I check security, database, hosting, backups, outdated packages and code quality. Within 5 working days you get a plain-language report with the risks ranked red, orange and green, and we go through it together in 30 minutes.

The fixed price covers one app with up to 15 screens or pages, one database and up to 3 connections to other services, such as payments, email or signing in with Google. Simply count the screens you can open in your app, such as sign-in, dashboard and settings. If your app is bigger, you get a fixed quote first.

If you start a maintenance plan within 30 days of the App Check, I deduct the full €600 from your plan. The App Check then costs you nothing extra.

Access to the code, for example through GitHub, and read access to your hosting and database, such as Supabase, Firebase or Vercel. Plus a short explanation of what your app does and who uses it. I help you share that access.

The App Check is the inspection and the report. What needs fixing, I pick up afterwards: within the support hours of your maintenance plan, or separately for €100 an hour. You choose what gets fixed.

Every plan includes monitoring of your app, a daily check for known vulnerabilities (CVEs) with the matching updates, backups and protection of your data, management of hosting and database, and a fixed number of support hours a month for bug fixes, small changes and advice. Basic has 5 hours, Plus 10 hours with WhatsApp, Business 20 hours with WhatsApp and phone.

For an outage I respond within 2 hours, on working days between 9:00 and 17:00. For a serious incident at the weekend within 4 hours. A bug that does not stop your work, I pick up the next working day. These times apply in every plan. Because your app is monitored, I often get an alert before you notice.

One-off extra hours cost €100 an hour. If you need more hours every month, you add them to your plan for €80 an hour, a 20% discount.

Not long: every plan can be cancelled monthly, with a notice period of one month.

Yes. You can keep building with Lovable, Cursor or another tool. I keep an eye on what changes, and if a new version breaks something or opens a hole, I fix it.

No. I do not carry out formal penetration tests or issue pentest reports. If you need one for a certification or a client’s requirement, a specialised firm is the right party. With the App Check and maintenance, I make sure your app goes into that well prepared.

I check whether secret keys are out of the code, whether your database only shows what a user is allowed to see, for example with Row Level Security in Supabase, and whether sign-in and permissions work properly. Every day I check your app’s packages for known vulnerabilities (CVEs) and update them. And I take care of backups and well-protected access to your data.

On the technical side, yes: I make sure your app protects personal data properly, with restricted access, encrypted connections and backups. I do not give legal advice on the GDPR, such as your privacy statement or data processing agreements.

SaaS platforms, web apps, internal tools, customer portals and integrations between systems. Everything runs in the browser. I do not build mobile apps for the App Store and Google Play, or desktop software.

We first decide together what the first version needs to do. Then you get a fixed price for exactly that version, so you know the cost up front. Projects start at €5,000 excl. VAT. I build in short rounds and show you what is there along the way, so you can steer.

With Java and Spring Boot for the backend, PostgreSQL as the database and Vue with TypeScript for the front end. Proven technology that banks use too and that many developers know. My own SaaS Traecy runs on it as well.

No, all prices on this site exclude VAT.

One-off hours cost €100 an hour excl. VAT. For bigger jobs and custom software you get a fixed price up front.

Basic suits a stable app that needs a fix now and then. Plus suits an app with paying users that keeps growing, and gives you WhatsApp for quick questions. Business is for an app your business runs on, with phone availability within an hour. After the App Check I give you advice.