Last-mile delivery software, agentic engineering, and safety-critical systems - Onfleet CTO Kjell Hedstrom builds teams and tech that thrive under real-world pressure. Kjell’s career spans commanding tanks in the Swedish army, setting up air traffic control at Heathrow, and building software for brain surgery. In this episode of SaaS That App, Kjell joins Aaron Marchbanks and Justin Edwards to explain how his background in safety-critical systems shaped his approach to engineering leadership, why he treats AI agents with the same trust-but-verify rigor as human developers, and what it took to overhaul Onfleet’s infrastructure, culture, and release process from the ground up. This podcast is brought to you by Delta Systems, your one-stop shop for front-end, back-end, and full-stack software development. At Delta, Justin and Aaron share the same philosophy when it comes to clients: they treat people like colleagues, not just customers. Maybe that’s why Delta typically spends years working with the same companies: how many software engineering firms can you say that about? So, if you’ve got a big SaaS project in mind but have no idea where to start, come and get a free scope and estimate from Delta Systems on their website. Got a burning idea for an episode, or a SaaS question you absolutely must know the answer to? Leave us a voice memo at SaaSThatApp.