Systems I've designed, built, and shipped.
Each case study follows the same honest structure: the challenge, the solution, the stack, and the outcome. Work under NDA is described in general terms — no confidential figures, no invented ones.
Telecom CVM Campaign Engine
Major Tanzanian telecom fintech · In production
A 7-stage Kafka pipeline powering 42+ campaign types for one of Tanzania's major telecom fintechs.
AI Transaction Failure Detection
Telecom fintech (internal) · Architecture phase
AI-powered detection and diagnosis of mobile money transaction failures — finding problems before customers report them.
FIFA World Cup 2026 Rewards API
Telecom fintech (internal) · Designed & built
A sports-data-driven rewards engine that turns live World Cup moments into customer rewards inside a consumer fintech app.
TangazaMax
Own product · Live in testing
A print-on-demand marketplace where Tanzanian artists upload designs and earn from shirts, mugs, bags, pillows, and wall art.
NexCard
Product + client engagements · Live, NFC hardware pilot
A digital business card platform — QR and NFC tap sharing, wallet passes, lead capture, and analytics — with an NFC hardware pilot.
Personalized Wedding Pages
Envaita · Prototype complete
One unique link per wedding guest — invitation, RSVP, and secure QR entry pass before the day; a keepsake album after it.
MPENYO WhatsApp Sales Bot + CRM
MPENYO · Delivered
WhatsApp-based book sales automation with a CRM, order tracking, and reporting — built on the official Meta Cloud API.
Smart Kanisa
Faith Fusion Digital · In development
A complete church management system with WhatsApp at its core, built for Tanzanian congregations and denomination networks.
Chakula POS
Own product · In development
A Swahili-first restaurant point of sale with mobile money payments and TRA VFD tax compliance built in.
Duka-Link
Own product · In development
A digital storefront that gives Tanzanian small sellers a real catalog, a shareable shop link, and orders they can track.
Want something like one of these?
Tell me which case study looks closest to your problem and where yours differs — that's the fastest way to a useful first conversation.