60fpson a 5-year-old laptop
Halo Editor
2026Lead front-end
A node-based shader editor that runs the graph on the GPU. The hard part was keeping the canvas at 60fps while React owned the panels around it.
- React
- WebGL
- Rust/WASM
Available for Q4 2026
I build the web thatreacts back
A front-end engineer who treats the browser as a canvas: motion, 3D and interaction, shipped to production at sixty frames a second.
- 10yr
- In production
- 42
- Projects
- 60fps
- Non-negotiable
Selected work
Things I shipped
Six projects where the interface was the product. Role, stack and the number that actually moved.
+38%trial-to-paid
Cadence
2025Creative technologist
An onboarding flow rebuilt as one continuous scroll scene. Interaction did the explaining that three tooltips used to fail at.
- Next.js
- Framer Motion
- GSAP
1.2Mpoints, no jank
Meridian Globe
2025Front-end
A real-time data globe rendering a million-plus points. Instanced geometry and a custom frustum cull kept it interactive on a phone.
- Three.js
- TypeScript
- GLSL
11 appsone design system
Ostara OS
2024Design engineer
A component system shared across eleven internal tools, built so a product manager could ship a page without a designer in the room.
- React
- Radix
- Tokens
4.7★App Store
Slow Radio
2024Interaction lead
A generative visualiser that reacts to whatever is playing, drawn on a canvas synced to the Web Audio analyser at frame rate.
- Svelte
- Web Audio
- Canvas
9 daysconcept to demo
Third Signal
2023Prototyper
A pitch prototype that had to feel real in under two weeks. It landed the round, then became the actual product.
- React
- R3F
- Zustand
How I work
Prototype early, measure always
The order matters. Building the risky part first is how you find out in week one, not week nine.
01
Prototype the risk
The scariest interaction gets built first, rough, so we learn whether it is even possible before the plan depends on it.
02
Design in code
No pixel-perfect mockup of a thing that moves. The design is the running build, reviewed in the browser.
03
Budget performance
A frame budget and a bundle budget from day one, checked on real hardware, not just the machine I built it on.
04
Systematise
Once it works, it becomes components and tokens so the next feature is cheaper than this one was.
05
Ship in slices
Behind flags, in small pieces, so the risky thing reaches real users before it is load-bearing.
06
Hand over
Docs, a walkthrough and a month of questions answered, because a clever build nobody understands is a liability.
About
Engineer first, but the fun kind
I sit in the overlap where design hands off and engineering picks up, and I have spent ten years arguing that the handoff should not exist. The best interfaces are designed in code, by someone who can feel a dropped frame.
That means I write the shaders and the state machine, I care about the bundle size and the easing curve equally, and I will not ship a thing that stutters on a mid-range phone just because it looks great on my laptop.
Design and engineering are one job, done in the browser
60fps on a mid-range phone or it does not ship
Motion that means something, never decoration
Documented and handed over, so it outlives me
10yr
Shipping to production
42
Projects
3
Conference talks
60fps
Non-negotiable
Practical
The questions before a contract
Day rate for contract work starts around €900, with a lower fractional-lead rate for longer engagements. Fixed-price only for tightly-scoped prototypes, because interactive work discovers its own requirements and an hourly ceiling protects us both. Tell me the budget and I’ll tell you honestly what fits inside it.
Contact
Tell me the problem
What you’re building, when it needs to exist, and roughly the budget. All three, ideally. The third one saves us both a week of dancing around it.
Work
hey@vesper.dev
Based
Amsterdam · remote
Code
github.com/vesper
Writing
vesper.dev/journal