Name: Leading head first with Feature Flags!
Start: 2026-05-28T14:00:00+0200
End: 2026-05-28T14:45:00+0200

Leading head first with Feature Flags!

FILLING

Thursday May 28, 2026 14:00 - 14:45 CEST

🧩 PM/UX ARENA

Limited Capacity filling up

A brief review of how I’ve used feature flags in the past, from:

Trying to contain demand during the early days of Deliveroo, using flags to avoid being overwhelmed with orders: the burger-equivalent of a DDoS attack;
Replacing the spaghetti code for an overly complex recommendation engine at RentalCars·com, and safely deprecate thousands of completely unstructured lines of code;
Quickly changing a financial risk model at a bank because the CTO (rightfully) thinks people in my team are dangerous key-smashers who shouldn’t be trusted with keyboard; to
How flags have helped surf the constant wave of great LLM fundamental models, and the occasional provider outage.

This, interleaved with lessons learned while building different flags systems:

Adoption depends on convenience, and making sure adding a flag isn’t seen as an overhead, or looming technical debt.
Flags need monitoring: both their state, but also how much they are called, and what happens after in your code.
Finally, how automated and agentic coding will change the role of flags in development.

Speakers

Bertil Hatt

DATADOG

Bertil has been a Data scientist and leading data teams for the last 26 years, and a solution engineer at Eppo (since acquired by Datadog) for the last two.
He’s worked for company as varied as Booking·com, Meta (twice), Farfetch, a few gaming studios, and start-ups where the lessons where epic, but whose names are better left forgotten. He built the original Data stack at Deliveroo and hopes that none it is still used... Read More →

Thursday May 28, 2026 14:00 - 14:45 CEST
🧩 PM/UX ARENA 135 Rue Sadi Carnot, Ronchin, France

Dev / Tech, Conference

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Dev Summit 2026

Bertil Hatt

Attendees (46)

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Dev Summit 2026

Bertil Hatt

Attendees (46)

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