Jonathan Tiret

Yo, you gotta hear about Jonathan Tiret. This guy’s the real deal in the tech startup world. He’s a YC S23 alum, but his story’s way more than just that. Dude’s been crushing it in the tech scene for a while now.

So, he’s now the co-founder and CTO of Upstream, which is basically trying to change how teams talk and work together. Imagine an email client made just for team collab – super slick, super needed. But what’s crazy is how he’s gotten here.

Jonathan’s got mad experience in SaaS, engineering, and product dev. Before Upstream, he was VP of Engineering at Doctrine – which, by the way, got acquired – and he held big tech roles at PhotoBox, HiPay, and SnapCar. This guy’s been deep in the trenches, building stuff that actually works and scales.

He started out in iOS dev, even working on cool shit like the official Roland Garros app – yeah, the tennis one. That’s where he cut his teeth. Then he went on to build Dino Gaïa, which was like one of France’s biggest online games back in the day. So, he’s been around the block, making things people love.

He’s been an investor since 2020, backing startups like Yummy – a delivery app for LATAM. He’s not just about building his own empire; he’s all in on supporting the next wave of founders. That shows he’s got a real passion for startups and innovation.

And here’s the thing – he’s not just some tech guy. He’s a builder who’s seen it all, from gaming to enterprise SaaS, to investing. His process screams one thing: he’s driven by a desire to create stuff that matters, to push boundaries, and to always be learning. Starting Upstream after splitting from his co-founder post-YC? That’s some real grit – he’s not afraid to take risks, learn from shit, and keep going.

Bottom line: Jonathan Tiret is a seasoned tech pro who’s been through the highs and lows, and now he’s shaping the future of team collaboration. He’s the kind of founder who’s been there, done that, and still isn’t done. No Cap – this guy’s a force to watch.