Sebastian Vietz

From Ai driven increase of change to Safe Velocity, guided by SRE

AI Doesn’t Break Software Engineering. It Moves the Constraints.

Why reliability, invariants, and guardrails matter more as AI accelerates code production. Introduction AI has already changed the rate at which software can be produced. What remains unclear is how much faster software systems can safely change. The ability to produce change is not the same as the ability to absorb its impact. Systems, operational […]

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Picture with titles of the series and anecdote surrounding an emergency centers dispatch terminal showing "no signal" on their displays

Ep.05 – No One Can Reach Dispatch

Inspired by the 2021 Meta outage – The day communication itself became the incident It started like any other morning at the city’s emergency coordination center. Calls came in, dispatchers relayed instructions, and fire, ambulance, and police units fanned out across the grid. Then, almost imperceptibly, something shifted. A few responders began reporting silence on

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Hotel guest trying to get into the lobby but one of 3 doors is not working. Confusion occurs as folks navigate to the remaining 2 entrances.

Ep.03 – The lobby doors are jammed

Inspired by the Oct 2026 Azure service disruption – Imagine you manage a large hotel. Your main revolving doors — the high-traffic entryways that connect guests to everything inside — are like the Azure Front Door technology service in cloud terms. Through them, guests reach check-in desks, concierge, key access, dining reservations, spa bookings —

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two hospital workers standing next to an empty contact list

Ep.04 – A hospital contact list gone missing

Inspired by the October 2026 AWS us-east-1 outage – Imagine a large hospital that updates its emergency contact list every hour. Suddenly, nobody can call the ER, security, or pharmacy — the whole hospital’s coordination grinds to a halt until someone manually restores the contact list. That’s essentially what happened inside AWS’s DNS automation: a

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