Mtuthuko Mngomezulu

Founder, iSinkwaMtase · Generative-AI engineer

KwaThema, Ekurhuleni · South Africa

Why I built GoldChat

Every app wants your phone number, then hands it to whoever else is in the room. I wanted one where my friends find me by a username, and my number stays mine.

The other half is data. Most chat apps are built for people who don’t think about megabytes. GoldChat is about 5 MB, compresses photos before they send, and works on a weak connection — because that is the phone most of the world actually carries.

The short version

Mathematics at Wits — the University of the Witwatersrand in Johannesburg — then years on the data floors of one of South Africa’s big four banks, and now building generative AI for enterprise software. GoldChat is what I do after hours, but it is built the way I build at work.

Now Generative-AI Engineer
Telephony voice agents, conversational AI, recommendation and price-estimation systems
to 2025 Senior Data Scientist
FNB South Africa — FirstRand group
before Data Scientist II
FNB South Africa — FirstRand group
2024 Founder, iSinkwaMtase
Creative venture studio from KwaThema — music, media, AI, technology
2022 IEEE-published researcher
ICEET 2022, recommendation systems, with the University of the Witwatersrand
Wits Computer Science & Applied Mathematics
Honours in Data Science

Where I work now, and the full history with dates — that is all on my LinkedIn. It is public, and it is the place I keep current. Click through and check me properly.

See my LinkedIn → mngomezulu.africa GitHub iSinkwaMtase

What GoldChat does with your details

Your phone number is used once, to verify that it’s you. It is never shown to other users and never sold — people find you by username. You can block or report anyone, and delete your account and everything in it from inside the app.

The full detail, including what we do not yet do, is written plainly in the privacy policy. If something there worries you, email me and say so.

Talk to me directly. I read these myself: communications@isinkwamtase.com. If GoldChat breaks, or you think something about it is wrong, that is the address.

Back to GoldChat