Aaron Marshall is the founder of Over, one of the world’s most popular photo editing apps. Shortly after the app took off, about 18 months ago, Marshall and his family relocated from the US to Cape Town.

“I like telling stories,” says Marshall, “so my talk at Tech4Africa is going to be some stories from our life and our experience.

Marshall’s talk is entitled: Go Big and Go Home. The keyword, he says, is ‘and’. “I think we live in a really fascinating, opportune time. There are lots of things we can waste our time on. And since life is short, I really want people to be working on meaningful products that are important to them and have a meaningful impact. Not social entrepreneurship – but doing things with meaning and not wasting our best years working on things we don’t care about for people who don’t care.

“I want to inspire people to make things that have real meaning,” he says, “There are so many startups, app this, VC that. It’s not enough to talk about why we are doing something. We need to know ‘what is our purpose here?’ If you don’t have a strong purpose it’s going to crumble and it’s going to hurt. That’s also why I say Go Big and Go Home – there’s no point in building if have no family to go home too. “

Marshall says he’s never been to Johannesburg before and is really looking forward to visiting, as well as having a chance to see (and hug) some old and new friends at the Tech4Africa conference.