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Fred Klopper

Web developer and newsletter specialist with 25+ years of experience

I've worked as a freelance web developer from Arnhem since 2011. From 2017 to 2025 I combined that with a part-time job at Laposta, the Dutch email marketing platform. There I specialised in newsletter templates and email marketing integrations.

I work on a project basis for agencies and direct clients. I follow common coding standards and test thoroughly before delivery. Clear communication and realistic planning are part of it.

I pick things up quickly, work independently and adapt easily to other developers, designers and the way they work.

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Fred Klopper

What I'm good at

Web development

  • Next.js, React and TypeScript
  • Payload CMS and Tailwind CSS
  • PHP, MySQL and PostgreSQL
  • Docker, Git and GitHub

WordPress and Drupal

  • Custom plugins and modules
  • WooCommerce integrations and custom work
  • Themes with Bootstrap, Sass and LiveCanvas
  • Migrations and technical optimisation

AI

  • Claude and Claude Code as a daily development partner
  • Building, reviewing and testing with AI
  • Every line of code stays my responsibility

Email marketing

  • WordPress plugins for Laposta
  • MJML newsletter templates
  • Fiig: live images in email
  • Laposta, Mailchimp, Mailjet and MailerLite

Design

  • Adobe Photoshop, Illustrator and InDesign

How I work

  • Project-based
  • Coding standards and thorough testing
  • Clear communication
  • Independent and flexible

What I work with every day

  • Claude
  • Next.js
  • React
  • TypeScript
  • Payload
  • Tailwind CSS
  • PostgreSQL
  • Docker
  • WordPress
  • WooCommerce
  • Drupal
  • PHP
  • JavaScript
  • HTML
  • CSS
  • Sass
  • Bootstrap
  • LiveCanvas
  • MJML
  • Laposta
  • Mailchimp
  • Mailjet
  • MailerLite
  • GitHub
  • Visual Studio Code
  • Adobe Creative Cloud
  • Apple

Experience

  1. 2011 to now

    Freelance web developer, Miix

    Drupal and WordPress development, Custom modules and plugins, MJML newsletter templates, Complete website projects, Hosting on my own VPS.

  2. 2017 to 2025

    Web developer, designer and helpdesk, Laposta

    Newsletter templates, Technical support and helpdesk, Design and build of API integrations, Design and development of laposta.nl.

  3. 2003 to 2011

    Web developer and database analyst, IrisZorg

    Intranet and intranet applications, Database analysis and optimisation, Print: flyers, brochures, posters, Technical support and documentation.

Experiments