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Kampala, Uganda · builder, operator & AI engineer

I build software that works inside African constraints.

Self-taught developer turned founder and AI/LLM engineer. Fifteen years shipping products across East & West Africa — grocery delivery at scale, civic AI on WhatsApp, ESG analytics, and the businesses built around them.

Jonathan Paul Katumba
$500K+
Capital raised across ventures
13
CTO-founders mentored
4
African markets shipped in
15+
Years building

What I do

A rare builder, operator and development-sector three-in-one.

Build

Full-stack & AI products. Offline-first, mobile-money, WhatsApp-native — built for how Africa actually uses software.

Operate

The founder’s seat. P&L, unit economics, ops and logistics. I built and ran Minute5 as CEO and CTO, scaling grocery delivery across four markets.

Consult

Development-sector delivery. Digital strategy for MSMEs and donors — currently leading a GIZ programme for 100 women-led businesses.

Teach

Mentoring & training. 13 CTO-founders at MEST, facilitator at Refactory, and my own Big Brain workshop.

Selected work

Things I’ve built and shipped.

See all projects

Writing

Notes on building, business and the journey.

Read the blog
MEST, More Than Just Code and Cash.
MEST Africa Apr 16, 2024

MEST, More Than Just Code and Cash.

Forget everything you think you know about tech incubators. MEST is more than just code and cash. It's a whirlwind adventure of self-discovery, where you'll not only learn to solve Africa's biggest problems but also figure out who you are in the process. Buckle up for a rollercoaster ride of learning, laughter, and late-night brainstorming sessions (with a mandatory dose of fun, of course!). This is the inside scoop on what MEST is really about, straight from a 2023 graduate who learned to balance hustling hard with celebrating even harder.

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From Frustration to Innovation. Whatever can go wrong will go wrong
Reseach and development (R&D) Mar 2, 2024

From Frustration to Innovation. Whatever can go wrong will go wrong

When we hear the term R&D, we usually simply smile and move on with life convincing ourselves that R&D is for big companies. Its so cruicial for startups as well but how to do it right and lean is where the challenge comes in and friends do I have lessons from this very recent painful experience.

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Is cloud computing and cloud PC a big deal?
cloud Sep 12, 2023

Is cloud computing and cloud PC a big deal?

Explore my journey into cloud computing, where I unveil its transformative potential for individuals and businesses. Join the mission of the Jabari team to democratize cloud computing, offering insights into the future of computing with cloud PCs. A must-read for tech enthusiasts and developers, it illuminates the cloud's evolving role in shaping our digital world and fostering future innovation.

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Have a problem worth solving?

I take on a small number of build and advisory engagements. Tell me what you’re trying to ship.

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