Hi, I'm Jeffrey van Rossum 👋
I'm a product engineer from the Netherlands. I have been building things for the web since 2004.
I make SaaS apps and WordPress plugins, and I design, build, sell and support them myself. Most recently, I have launched Datalumo and Veldform. I also maintain a handful of open-source projects.
I take freelance work occasionally, and I am interested in it always. You can find me on X, GitHub, YouTube and Instagram, or reach me by email.
Products
Datalumo ·
Datalumo reads your website, docs and files, then answers your visitors' questions with AI.
SaaS
Gravity Forms Send to API ·
Forward Gravity Forms entries to virtually any REST API. Pick a method, authenticate, map your fields, and go.
€39
Veldform ·
WordPress form builder that feels like a native extension of WordPress, with payments, API connections and AI.
€49
VoiceThisText.com ·
A SaaS for generating, hosting, and distributing text-to-speech audio across several TTS models.
SaaS
Open-source
GitHub
github.com/jeffreyvr
TailPress
· WordPress starter theme with Tailwind CSS, Vite, and an installer.
1.5k ★
DropBlockEditor
· Livewire-powered block editor for Laravel apps.
122 ★
WP Settings
· Build settings pages for WordPress plugins without wrestling the Settings API.
89 ★
Paver Editor
· Drag-and-drop block editor built for PHP developers.
47 ★
WP Meta Box
· Register custom meta boxes in WordPress plugins with less boilerplate.
6 ★
TailPress Installer
· Installer for TailPress.
4 ★
Easy Liveblogs
· Liveblogs for WordPress, cover live events with real-time, chronological updates.
4 ★
WP Mail
· Send polished, responsive WordPress emails with a fluent API.
3 ★
TailPress Framework
· Framework for TailPress.
13.2k ↓
Contextr
· Analyze text with AI, spam, sentiment, moderation, with confidence scores.
50 ↓
Writing
all posts
2026
Introducing Datalumo
08/26
DocSigner: sign PDFs in your browser
07/26
I sold 143 licenses and never asked for feedback
07/26
2025
Simplifying WordPress Emails with a Fluent API
07/25
Video: WordPress theme development with Tailwind CSS and Vite
04/25
Freelance?
Occasionally. Interesting? Always.
Tell me what you're building. I usually reply
within a day.
get in touch →
Whereabouts