Ultra-fast interfaces for internal tools.
Slow internal tools quietly cost companies thousands of hours of productivity every year.
I design and build ultra-fast interfaces for AI and document workflows — annotation platforms, review systems, and other tools used all day by professionals.
My specialty is eliminating workflow bottlenecks: keyboard-first interaction, zero-lag performance, and interfaces that stay fast under real workloads.
Faster interfaces mean higher throughput, fewer errors, and less user frustration.
Hire me for:
- Power-User UX (keyboard-first workflows)
- Annotation & Labeling Interfaces (RLHF / ML)
- High-Volume Document Workflows
- Data Validation & Review Tools
Typical clients include AI startups, SaaS companies, and product teams building complex internal tools.
Example HITL Tool
Gearbox HITL Data Validator
A greenhouse ML team needed to label thousands of tomato images to train their ripeness model — fast and accurately. I built a keyboard-first interface that let specialists rate images without touching the mouse.
View Interactive Demo →Let's talk
If your team is losing time to a slow or clunky internal tool, I'd like to hear about it. Send me a short email or plan a 20-minute call to see if I can help.
About Me
Building interfaces for people who use them all day — and notice every wasted second.
I'm Eric, a frontend developer with a focus on high-velocity internal tooling. I've been freelancing since 2007, and the work I find most satisfying sits at the intersection of complex data, fast interaction, and users who have zero patience for friction.
I specialise in the kind of tooling AI and ML teams need most — annotation platforms, RLHF labeling interfaces, data validation tools. Problems where interface quality directly affects the quality of the work being done.
I'm based in the Netherlands and available for work with clients worldwide.