Cloud Native AI Summit
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Florian Margaine

Speaker

Florian Margaine

Field CTO · Upsun

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About

Florian is an experienced engineering leader with a strong background in software development and open-source contributions. He has worked across a range of technical roles, contributing to everything from early-stage startups to large-scale cloud platforms. Throughout his career, he’s focused on building scalable systems and leading high-performing teams with a strong emphasis on engineering culture and continuous improvement. He’s also an active open-source contributor, with work spanning tools and ecosystems like the Linux kernel, PHP, Node.js, and npm. Whether experimenting with languages like Go or Common Lisp or building developer-focused tools, Florian enjoys staying close to the code and sharing knowledge with the broader community. Currently, Florian serves as Field CTO at Platform.sh, where he helps connect technical strategy with customer success, bridging the gap between engineering and real-world platform adoption.

Session

So... which stack?

Talk

Choosing a technology stack for interactive AI apps, in the age of coding agents. You're starting a greenfield project in 2026: an interactive AI application with live UI updates, background workers, and agents talking to LLM providers. Your team is polyglot, and a coding agent writes most of the code — so which technology stack do you actually pick? This talk tours the major ecosystems — Symfony, Laravel, Phoenix, Django, .NET, Go, Node.js, and Java — through three maturity lenses: AI/agentic support, background workers, and interactive UI. Spoiler: every ecosystem has a weak leg, and there is no perfect-score stack. Then we get to the real point: the deciding factor has shifted. Before coding agents, team expertise picked the winner — you went with what you knew. Now that agents write the code and reading fluency is trainable, the question is no longer "how well can we write this?" but "how well can we run this?" — hosting support, laptop-friendliness, and operating cost become the tiebreakers. And since switching stacks is cheaper than ever, your platform choices shouldn't be the thing that locks you in.

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