Matlali believes that coding can lead to a generation of innovators. "And you don't need money - it's one of the few industries that all you need is sweat capital. It is a matter of opportunity and role models."
No one knows this better than she does. Orphaned at a young age, she and her six siblings went to live with her grandfather, in Belfast, Mpumalanga. A few months later an aunt died and five more children joined the family.
It was her grandfather, a gardener who woke at 4am each day, rode a bicycle to work and earned R150 a month, who gave her the confidence and will to make something of her life. "If you study hard," he would say, "you will never remember you were an orphan."
"He was an old, traditional man but he never made me feel like 'just a girl'. He wanted me to become a doctor. If he met an orphan who had become successful he would come home and say, 'This could be you.'
"There were days when we would go to the neighbours and ask for tea or sugar or matches. It was really tough but we were inspired irrespective of our circumstances."
When Matlali got her matric, her grandfather went to Beares and bought her a three-CD music system that he paid off in instalments.
"I am who I am because of him," she says.
And it's probably why she never gave up on her dream.
She has had stickers made for all her geeks, quoting Albert Einstein: "It's not that I'm smart, it's just that I stay with problems longer."