Founder @ stroma.design | Performance Intelligence | prev Eng Manager @MultiChoiceGRP
Joined September 2009
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145 Photos and videos
Apr 7
Since ChatGPT dropped, we're all 10x engineers now. So the web must be getting faster, right?
Wrong.
I pulled 4 years of empirical performance data for the South African Insurance sector. The findings are sobering. 🇿🇦
A short thread on the 'Interaction Tax' 🧵👇
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Apr 7
4️⃣ The Hardware Subsidy: The only reason the sector hasn't ground to a halt? Consumers upgrade their phones, which masks the bloat.
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Apr 7
In an era where it's easier than ever to ship code, it's harder than ever to stay fast.
Where does your funnel sit on this curve? Run a scan to see your risk and opportunity: 🔗 stroma.design/scan
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Jan 20
Day 4: Bring your own Drum Kits 🥁
Drag & Drop your own samples directly into the sequencer (bulk import or per-track)
I'm debating adding persistence so you can A/B test kits without re-dragging. Would you use that?
#buildinpublic #webaudio
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Jan 19
💡Stop over-indexing on synthetic Lighthouse audits that don't represent your real users.
Lighthouse tells you that your site is slow. The web-vitals library (attribution build) tells you what is slow.
Instead of a generic number (LCP: 2.4s), pipe the full diagnostic context as custom dimensions to your analytics tool:
1. debug_target (The exact DOM element)
2. debug_time_to_first_byte
3. debug_element_render_delay
Give it a go! 📦 npm install web-vitals
#PerfMatters #WebPerf
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Jan 16
Day 3: Ghost notes Grid Locks 👻
1. Sequencer now fills gaps with quiet, syncopated ghost hits (like a real drummer)
2. Ability to 'lock' tracks that bypass swing and stay on grid.
(Demoing the lock on the Kick below to keep the beat anchored 👇)
#buildinpublic #webaudio
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Jan 14
Day 2: Finally cracked the math behind the #jdilla swing. 🍩
Got the humanize dial working - it injects specific micro-shifts (push/pull) to the kick, snare, and hihats to get that off-grid feel. It’s starting to sound properly "drunk" now.
Sound on 👇
#buildinpublic #webaudio
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Jan 9
Been sleeping on the Web Audio API and @GoogleMagenta.
Trying to recreate that iconic #jdilla swing in the browser. 🥁
props to @cwilso for the article on audio clocks (web.dev/articles/audio-sched…)
basic step sequencer for now 👇
#buildinpublic #webaudio
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17 Nov 2025
Finally built up the courage to give my first talk.
Stream link:
youtube.com/live/SKJRVwwUBaw…
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Jonathan Booysen retweeted
24 Oct 2019
The separation between design and development is self imposed. Don't build a bridge. Tear down the wall.
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Jonathan Booysen retweeted
9 Aug 2019
I just published Africa’s next billion-dollar start-up. link.medium.com/WqGP3JvP0Y
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Jonathan Booysen retweeted
13 Jun 2019
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Jonathan Booysen retweeted
18 Nov 2018
We have thousands of incredibly shitty programs and apps that were shipped on time. Deadlines don’t make things better.
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8 Aug 2018
Will this be live-streamed @WitsUniversity ?
8 Aug 2018
Jack Ma, the founder of Chinese e-commerce giant Alibaba, will on Wednesday launch the "Netpreneur Prize" initiative on his first ever visit to South Africa.
#JackMa #Alibaba
africannewsagency.com/busine…
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4 Jul 2018
Cool webinar series from InVision—DesignTalks: UX Copy. Check it out here: invisionapp.com/webinars/des…